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Posted by __fst__ 19 hours ago

Casio F-B100W-1A(www.casio.com)
396 points | 330 comments
lonfo 10 minutes ago|
I am going to take advantage of all the Casio expert to ask whether it is possible to invert the screen from dark background to light background in these watches. I have seen articles and tutorials online but the guy at the shop told me absolutely not. I have the ABL-100WE. Thank you
SwellJoe 14 hours ago||
Casio has been leaving a lot of money on the table in terms of nostalgia products. There's been a low rumble of demand for the Casio CZ series of synthesizers for a decade or more, and a bunch of non-Casio companies have cashed in on it (Behringer makes CZ-1 Mini, Arturia has CZ V, several other phase distortion synths exist). It's incredibly cheap to replicate, a simple early digital synthesis algorithm that'll run on anything; Korg has been making ARM-based emulation synths (basically a Raspberry Pi-like SoC in a keyboard form factor with some knobs) for a decade or more and I have to assume their margins are very comfortable since most of the guts are off-the-shelf low-cost parts rather than custom chips.

But, I guess their watches were always a bigger business than the synths.

TheOtherHobbes 11 hours ago||
Korg did it right - budget off-the-shelf processor, most of the money spent on the UI, wildly optimistic prices, no nostalgic ties.

The expensive part of a modern synth isn't the DSP board, it's the industrial design and tooling needed to build the rest of the hardware.

The CZ series was workable, but there really aren't many passionate nostalgic buyers waiting to drop a few hundred - minimum - on an expensive reissue.

piltdownman 3 hours ago|||
This is where Behringer absolutely shine - about a decade ago they established a fully automated mega-factory in Malaysia designed around Siemens’ Xcelerator portfolio, PLM/MES software, and Digital Twin technology.

Korg 2600 - ~ €1000 Behringer 2600 - €300

CZ Series doesn't have much cachet simply because phase distortion synthesis was the 'we have FM Synthesis at home' cheap alternative to 4 OP FM Synthesis in the 80s. About the only USP they have in that arena is the fact they're responsible for the 'Reese Bass' sound - the 'Wilhelm Scream' of Techno if you will.

indianwashlets 1 minute ago||
Malaysia? I don't think that intended land use went forward, check again?

They refurbed their Chinese on OTOH.

SwellJoe 10 hours ago||||
I don't think I buy that argument (that there aren't enough people interested in it).

It's not quite in the ball park of something like the DX 7 or several of the better known analog synths, which have nearly all seen re-issues, mini-versions, software emulations, etc., often several. Damned near every Roland synth from that era has seen a re-issue and official plugin. Yamaha has been more measured in their re-issue plays, but the DX did get a reface DX, along with the CS, CP and YC. FM synthesis has been wildly successful in nostalgia synths as well as novel takes on the idea (e.g. the Elektron FM groove box) and Korg's Opsix (I have two of them, the first gen small one and the big expensive one made in Japan), and Yamaha still ships FM synthesis engines in their high end workstations. And, there's at least four plugins that emulate the CZ (I'm working on a fifth to be released in another month or two).

I don't think all that would exist without some demand. I have a soft spot for early digital synths, and I think a lot of other folks do, too. I don't like to buy from Behringer, but it's the only hardware option out there right now aside from the real thing (I own a real CZ 101, but I wouldn't want to take it out of the studio).

AudioPilz (Bad Gear) even made a video demanding it: https://www.youtube.com/watch?v=Kb8nMZE-bb0

timc3 3 hours ago|||
There is always https://busycircuits.com/pages/alm042
Lio 4 hours ago||||
Hell you can often even find the Korg Volca FM for under 100 bucks and it’s a patch compatible DX7 clone.

I have a Casio CZ-5000, the 61 key version with sequencer. It’s well made but given its age I’m not sure I’d want to take that to a gig either.

TylerE 9 hours ago|||
> I don't think I buy that argument (that there aren't enough people interested in it).

That you can buy them on ebay all day long for less than most cheap synths costs new argues against it being viable.

SwellJoe 9 hours ago||
The prices are pretty similar to Yamaha DX series synths on eBay right now (starting at about $300 and going on up to $700 for working specimens, depending on model and condition).
TylerE 6 hours ago||
Not really. XZ1000 $300-600. DX7 $700-1000.
SwellJoe 5 hours ago||
According to what I can dig up, the original MSRP of the DX7 was $1995. The original MSRP of the Casio CZ 101 was $395. So, by my reckoning, the CZ has a higher collector value than the DX7 based on relative price change over the years.

Edit: But also, the CZ was generally more comparable to lower-end DX synths, like the DX27 or DX9. It was a budget synth in its day, while the DX7 was the pinnacle of digital synthesis for at least a year or two after release, everyone had to have one.

TheOtherHobbes 1 hour ago||
The core of the vintage remake market is "Always wanted this, still can only afford a clone" which is where Behringer lives.

There's also a "Always wanted this, can finally afford it now that I'm rich" niche for the high-end remakes from Korg and occasionally Moog etc.

There isn't a huge "Bought this forty years ago because I couldn't afford anything better and would quite like a modern remake" segment.

Casio do still make pianos and Casiotone keys which include samples and some CZ and VZ series sounds. (I don't know if they're sampled or DSP.)

coldtea 3 hours ago||||
>Korg did it right - budget off-the-shelf processor, most of the money spent on the UI, wildly optimistic prices, no nostalgic ties.

Korg does put out "nostalgic" remakes of analog synths just as well: MS-20 (complete with patch board), Arp 2600, as well as digital versions like the Korg multi/poly virtual analog.

fitsumbelay 10 hours ago|||
Agreed. My knowledge/experience with synths is limited but between DSPs that're as available as ketchup and Kleenex for the past few decades and an LLM there's not much to rolling one's one. A watch on the other hand is higher LOE
SwellJoe 10 hours ago||
There's not much to rolling one's own FM synth, either, and there are dozens of successful commercial products built on it.
altairprime 13 hours ago|||
> Casio has been leaving a lot of money on the table in terms of nostalgia products

Casio has been quite successful at not abusing trust in their brand by releasing lower-quality outsourced replicas like HP did with their calculators. Not that HP had much farther to fall but it’s nice to see a corporation that’s not incompetent!

SwellJoe 12 hours ago||
They don't have far to fall in the synth world. Their current keyboard line has no synthesizers to speak of. But, also, they still have a keyboard line and relationships with music dealers, so presumably they wouldn't need to outsource the return of the CZ.
usrusr 12 hours ago|||
Trying not to leave any money on the table is exactly the approach that reliably kills off nostalgia income streams.

Picking off some low hanging fruit while demonstrating provable restraint can result in a huge money stream that goes on and on. But when the mindset "it's good, but it can be better!" becomes dominant (e.g. through market dynamics, being publicly traded means that ownership perpetually shifts to those who think that income sources could be squeezed just a little harder, or much harder, actually), it quickly turns sour. And when it flips from beloved to "why throw money at those greedy $expletive,plural" it flips hard, and forever.

asimovfan 11 hours ago||
G-Shocks could be so much better, and it has been this way for at least a decade.
coldtea 3 hours ago||
"So much better" means "with added smartwatch crap"?

The whole value of them is they are simple, minimally changed over time (you can depend on getting the same model in a decade), functional, with no/bare minimum smartwatch crappery, essentially endless battery, and no planned obselecense.

numpad0 9 hours ago|||
A lot of Japanese companies leave piles on the table. One often unnoticed reality of Japanese imports and exports, at least in modern days, is that Japan as a whole has total double standards on those, requiring over the top perfection for imports but exports are almost on take it or leave it basis. Even Nintendo products are at barely acceptable levels if the standards for imports were applied to e.g. en-US editions. It's a miracle that Japanese products have substantial sales volumes and good reputations at all. It's quite unlike Chinese engineering of today.
coldtea 3 hours ago||
You make it sound like their exports are subpar. They're excellent.
johnke 1 hour ago|||
> basically a Raspberry Pi-like SoC

Not just Pi-like - the Wavestate is using an actual Raspberry Pi CM3 module! https://www.raspberrypi.com/news/electronic-music-icon-korg-...

monster_truck 4 hours ago|||
Hmm I wonder what else Casio watches have been a big part of over the past 30 years that may have put a hamper on such things, I wouldn't look into it
Ancapistani 4 hours ago||
Good point. They’re probably repurposing an F-91W line.
v9v 2 hours ago|||
The (relatively new) Casiotone CT-S1000V and CT-S500 have CZ sounds included along with fun voice synthesis technology, and are recommended as a good cheap keyboard on some forums.
ajxs 7 hours ago|||
It's a really good question why Casio didn't continue making synths after the 80s. It's possible that the entire CZ-line was intended to be a one-off response to Yamaha's breakaway success with the DX7. After the CZ-line, it looks like Casio tried to keep up with Yamaha for a few years, but exited the market after Yamaha launched the SY-line. From what I understand, the CZ-series were great sellers then, but even with all of the nostalgia they'd never move large numbers now.

For what it's worth, Yamaha aren't particularly nostalgic about their cult-classic synths either. I guess that from their perspective, the DX7 and CZ-101 were already obsolete within a few short years. By 1990 the sound had already become quite dated, and technology had moved on. Now that they've become popular again as a cult-classic, the margin just isn't there anymore because of the market share of software, or cheap independent FM/PD synths.

Shameless plug, in case anyone is interested, I've done some work reverse-engineering some of these synths:

- https://github.com/ajxs/casio_cz101_rom_disassembly

- https://ajxs.me/blog/uCOM-87_The_Strangest_Architecture_Youv...

SwellJoe 5 hours ago||
Awesome. When I was researching the CZ 101 (still am, actually), I spent some time reading the MAME implementation, including the NEC upd933 chip emulation. I was going to say I'm surprised I didn't find your docs, but it looks like they were all published late last year which is precisely when I was doing my research (I used the holiday to work on some projects I'd been stewing on in the back of my mind, and a phase distortion plugin was one of them).

I don't know why I find that era of synth so enjoyable and interesting, but I do. I love every FM synth, but that side of things feels pretty well covered by existing tools. Korg makes the OpSix (and I have two), Yamaha has the reface DX and I think their workstations still ship an AFM engine, and there are at least a half dozen plugins that are mostly quite accurate, and a handful of other hardware options.

Phase distortion just feels more neglected, so that's the one I've been spending time on. I have an excellent engine running, which is more accurate than the Arturia CZ V engine (at least compared to my actual CZ 101, maybe they were comparing against another model, but the MAME engine is also like the real CZ and not like Arturia, so I am inclined to say Arturia got sloppy), but I'm going pretty slow on the UI. Making a nice plugin UI for a synth that didn't have a nice UI is a challenge. You can't just copy the original UI if you want it to be fun to use.

ilikeitdark13 11 hours ago|||
Completely right about the synths, Casio has been missing out. Their new Sampler looks really nice, and has been a surprise in the music world.
NDlurker 7 hours ago|||
That sampler looks so fun and I want to buy it but I already have a PO33 and SP404 MK2. So I really don't need it. Probably keep an eye out on reverb in the next year or so
SwellJoe 10 hours ago|||
They've also dipped their toes into guitar toys with the Dimension Shifter. They do seem to be kind of paying attention to the music market again, after decades away from it. So, I'll keep hoping for a really good CZ re-issue.
steve-atx-7600 8 hours ago|||
Hopefully because they’re focusing on having relevance in the future. It’s sad as a gen Xer to see Japanese electronics companies fading away.
SwellJoe 5 hours ago||
They ate American manufacturing's lunch and now China is eating theirs. The circle of life, or something. But, yeah, I have fond feelings for a lot of Japanese brands, not just electronics (my favorite car since childhood is a Nissan Z, speaking of Japanese companies on the ropes).
karlgkk 13 hours ago|||
the watches are a high end fast fashion brand in japan. it seems to be very lucrative
coldtea 3 hours ago|||
Not just Japan, they're widely popular globally as daily drivers, but also as "fashion" watches, with Gen Z too.
ChrisMarshallNY 13 hours ago||||
I have a couple of Oceanus brand watches that I got in Japan. They are fairly un-cheap.

However, in Japan, their G-Shock brand (kind of lower cost, in the US), can get even more expensive than Oceanus. Some of them look like Pip-Boys (Because this is HN, I need to mention that this is a deliberate exaggeration).

wolvoleo 11 hours ago||
Now I'm curious, do you have some examples?
karlgkk 4 hours ago|||
Look up gshocks around $300 on chrono24 etc. then go look up the new MSRP

There are collectible models that sell used higher than they were new, but for the most part they’re much cheaper

Then there are lines like MR-G. hand hammered metal cases made out of premium materials.

ChrisMarshallNY 8 minutes ago||
It's entirely possible that the more expensive "G-Shocks" were Mr G. I remember seeing wording about titanium cases, etc., but most of it was in Japanese, so the only thing that jumped out at me, were the price tags.
ChrisMarshallNY 10 hours ago|||
Not offhand. I got the watches in that big Akihabura store, about 20 years ago, and they had a shitton of G-Shocks, as well as Oceanus. I saw several 6-digit prices.

Many of the folks I worked with, could afford good watches, and wore G-Shocks. They were quite proud of them.

I suspect you’ll see them on the Japanese Casio site.

fnord77 9 hours ago|||
80s casio watches are the rage with kids in the US, too
slim 10 hours ago||
you can have cz samples in the upcoming Casio SXC-1 ! toy sampler is the new toy synthesizer
SwellJoe 4 hours ago||
I have a real CZ 101. And, I've implemented a synth engine that emulates it quite closely.

But, I still want a modern Casio CZ. I just think it'd be neat.

The sampler is cool, though.

jorvi 18 hours ago||
One thing I've never understood (and hopefully some Casio geek can shine a light on): why do almost all old Casio models have a 24/12h time switch taking the premium spot as one of the main 4 buttons, instead of having it buried deep in the (awkward) menus. Seems to me that something like alarm or stopwatch setting or a second menu action button would have been far more useful.
VPenkov 13 hours ago||
Newish Casio user here. From what I understand, it's so that you can switch it to 24h after accidentally switching it to 12h and vice versa.
apt-apt-apt-apt 12 hours ago|||
HN makes me laugh like twice a year – you're either the first or second!
lanewinfield 11 hours ago||
you mean the first or the thirteenth.
psolidgold 7 hours ago||
I see what you did there
cryo32 13 hours ago||||
Been using Casio watches since 1983. That is exactly what it is for.
hemmert 12 hours ago||||
Plus, you don't have to manually convert from 24h to 12h time.
euroderf 9 hours ago||
The state of American math skillz.
stasomatic 10 hours ago||||
You are joking, but perhaps it's exactly what it's for.
subscribed 4 hours ago|||
Well done!
bushwart 18 hours ago|||
I spoke with a Casio engineer about this. It's so that your bending wrist can accidentally switch it to 12h time when you actually really want it on 24h time or vice versa.
NAR8789 17 hours ago|||
+1 I use this all the time and can't live without it
ajsnigrutin 29 minutes ago|||
Is this a joke, or an actual answer?

They could just set it to 12h mode for americans and 24h mode for the rest of the world, and hid the setting somewhere deep in the menus (hold this button for 3s, then press that button 5 times, and then the other button two times, etc.), so you could change it from american to normal display if needed, and never again press it by accident.

mrweasel 4 hours ago|||
A watch like the F-91W is a bit wonky in terms of the buttons. You're right the 24/12h makes no sense, who needs to switch between those two options regularly? The backlight button is also questionable, because it's not entirely clear what you're suppose to gain by vaguely illuminating the first 20% of display, which will be empty from midnight until 20:00.
nielsole 2 hours ago||
At night it is more than sufficient. I even use it as a flashlight
mrweasel 30 minutes ago||
It has to be extremely dark though, or maybe mine has a worse than normal backlight. Other models are much better, it's just the F-91W.

The fact that Casio is well aware that the backlight is just terrible, but haven't fixed it in close to 40 years is hilarious and just makes me love it even more.

RoadieRoller 18 hours ago|||
In my country, 30-40 years back, people who needed a watch were those ones who travel regularly. And travel was mostly using public transport, trains and planes. Most or all of it operated using a 24h time. That button was very useful. Compare that to the mute/silence/DND physical button in iPhones today.

Also people who worked in confined spaces who wouldn’t know if it was day or night outside after a days job. My father who worked in an oil rig in Abu Dhabi used one. He gifted me one.

This was 1998.

tass 17 hours ago|||
Yes but why not just always use 24h time (or 12h if that’s what you like).

It’s a little strange that a dedicated button would be needed to switch between them, especially when the math to convert between them is so simple.

whizzter 1 hour ago||
Exactly, my kids knew how to convert between the formats at a fairly young age.
bestouff 16 hours ago||||
OK, but who would use 12h time ? I never understood, this seems so backwards.
cmoski 14 hours ago|||
People who can't reliably subtract 12 from numbers. They're out there.
Retr0id 14 hours ago||
It's me! (But I solve it by using 24h for everything)
themadturk 14 hours ago||||
How about someone who was raised on 12h time and has used it for 70 years? Sure, the math to convert is pretty easy, but why?
m000 43 minutes ago|||
I.e. boomers holding everyone else back again.
bestouff 13 hours ago|||
Ok right. I didn't know people were used to that.
lproven 1 hour ago|||
I am grappling with this but I can't.

You did not know that large parts of the world default to 12h time?

This is absolutely NOT an American thing. I am not American and have never lived there. I am 58 years old, British and Irish, and lived a decade in Nigeria and a decade in Czechia. I have travelled widely around Europe and can get by in 6 foreign languages.

12h time in real daily life is more common everywhere I have ever been. Only minor subsections of humanity -- military people, maybe -- work on the 24h clock.

workmandan 39 minutes ago||
I am 38 and British and use 24hr clocks exclusively. This is also very common on the continent - the French nearly always use 24hr time for everything
yepyeppers 13 hours ago|||
You didn’t know about 300 million Americans?
williamdclt 1 hour ago|||
I'd guess that the very large majority of people don't know that americans use 12h time, no. Why would they?
afandian 12 hours ago|||
I doubt that anyone knows 300 million people let alone that many Americans.
bigfatkitten 14 hours ago|||
Americans. The U.S. has a lot of people who are unaccustomed to 24 hour time.
bestouff 13 hours ago|||
I knew for the imperial units but not this. This country ... let's say it always amaze me.
farlight 11 hours ago||
They use US customary, not imperial, they're slightly different sets of units.

https://en.wikipedia.org/wiki/United_States_customary_units

bestouff 4 hours ago||
> Some advocates of the customary system saw the French Revolutionary, or metric, system as atheistic. The president of an Ohio auxiliary of the Institute wrote that the traditional units were "a just weight and a just measure, which alone are acceptable to the Lord". His organization later went so far as to publish music for a song proclaiming "down with every 'metric' scheme".

Ooh that explains a lot.

kridsdale1 12 hours ago|||
It’s the whole Anglosphere. We do it, as well as imperial measurements, to give the finger to Napoleon and his metric 10 hour long day system.
Lio 4 hours ago|||
It’s not the whole Anglosphere.

24 hour time is used extensively in the UK. For example, all public transport uses 24 hour times here.

pezezin 12 hours ago|||
But 24-hour time is not decimal, isn't it what you guys like?
CorrectHorseBat 17 hours ago|||
How about just leaving it on 24h time all the time?
speak_plainly 18 hours ago|||
Those buttons are the menu. The idea of menus on watches is a modern ux extravagance.

I don’t have the satisfying answer as to why they dedicated a button to 12/24 hour time but my guess is that it’s simply a cool digital feature and stands out against the limitations of analog watches.

dlcarrier 15 hours ago|||
They had modal menus back then, they just didn't display them. You had to memorize which obscure symbols to press, to change various settings. For example, in the 1970's, HP's calculator watch required pressing ⯅• to switch between 12 hr and 24 hr modes, or A⯅A to clear an alarm.

In the 80's and 90's, when sixteen-segment and dot-matrix displays made displaying text easier, calculators started displaying menu items, so you didn't have to memorize the sequence.

Since then, we've moved on to full-color high-resolution displays that can handle any text of any language, and the menus have more-or-less switched back to memorizing a sequence of which obscure symbols to press, I guess because some people think they look cool? Sometimes there's no menu at all, and you just have to memorize finger movements.

lproven 1 hour ago|||
> required pressing ⯅•

I don't know what clever jiggery-pokery you are trying to do, but whatever you typed, it's just turning to tofu on this Macbook, in both Chrome and Firefox.

usrusr 11 hours ago|||
You can bury stuff like setting the time into a menu, people will accept it. They know that there will be a way to set the time. But if the 12/24 is hidden, whatever is picked as the default will drive away a noticeable fraction of those would-be buyers who prefer the other setting. For starters, pretty much everybody who does not get pulled into a sales person interaction that's sufficiently deep to touch the subject. And that sales person interaction won't be the best possibly, you don't want to bore them with nuisance settings, you want to show off The Stopwatch (or whatever was the flagship feature of the watch in question)
boomlinde 5 hours ago||||
There are menus on these watches, though. On the F91w the menu button flips through different setting modes which affect the function of the other buttons.
pjmlp 18 hours ago|||
To add to it, I always kept the manuals around, because remembering the key press sequences was akin to doing combos in arcade fighting games.

A few months without doing them, and it was hopeless trying to remember how to do them again.

radiator 17 hours ago|||
I always followed trial and error until I reached my target and I had the feeling that my results were much better than if I were randomly clicking buttons. That is, some memory always remained. Or the menu is well thought out and has some consistency.
LtWorf 4 hours ago||||
Casio watches all have the same.

The beauty of them is that I can pick up any casio model from any year and I know how it works.

That my friend is peak design.

minusLik 16 hours ago||||
The button press sequences are still combo-style; when I set one of the alarms on my ABL-100WE, it always ends in trial and error. I mean, basically it's logical, but when the buttons change what they do (e.g. when the display says "SET", the light button becomes "up"), it throws me off.
slater 15 hours ago|||
I have a 6.30AM alarm on my FW-91, and I'm too lazy to figure out how to switch it off.

15 beeps, btw, till it turns itself off for the day.

rbanffy 13 hours ago|||
> 15 beeps, btw, till it turns itself off for the day

One thing I miss that’s not on my Fitbit is an hourly warning. When you have ADHD, it’s a huge helper.

selcuka 11 hours ago|||
> I'm too lazy to figure out how to switch it off.

Press MODE, then press ALARM ON/OFF.

Beretta_Vexee 1 hour ago|||
For a very long time, China and India used a mixture of the 12-hour and 24-hour formats, which meant they had to convert the time or switch between time formats multiple times par day. That was the intended use of this button.

Both countries have now officially switched to the 24-hour format.

williamdclt 1 hour ago||
I'm skeptical. Switching between time formats when you're used to it requires 0 cognitive effort, and certainly doesn't warrant a button. Eg in France, people use 24h time for display but talk in either 12h or 24h time depending on personal preference, so you might look at "17:00" and say "5" without even thinking about it, it's just a different name for 17.
bluebarbet 45 minutes ago||
True (and can confirm) but this assumes a lifetime's habit of interchanging the two.
benrutter 13 hours ago|||
Wearing a Casio as I type this. The "24hr" button switches 12/24 modes on the "watch" mode, when using stopwatch it starts the watch, and when using alarms it turns the alarm on/off.

It has pretty critical functionality for those, I think the way its labeled on the watch face just makes it sound a little odd.

Ekaros 4 hours ago||
Now that I think I can't very fast come up with any feature I would want to have on third button in clock display mode. UI is 3 buttons, light, mode and one mode dependant. So I can't think what you would use it for in clock mode. So better have it work, but do something inconsequential...
teekert 4 hours ago|||
Even worse, my Casio can't even change the default mm-dd to my country's default dd-mm, keeps throwing me off.

I used to walk around with a Casio always, I would have welcomed this connectivity, but now I have a Pebble and I like the balance. Could have done without the HR monitor, and with GPS though (some features don't work without phone connection, too many I find). Other than that, perfect for me.

vablings 17 hours ago|||
My F-91F I replaced the Casio module with an Ollee watch and pretty much disabled all of the features, I can sync the time when reconnecting to Bluetooth on my phone which I do about once a month.
teekert 4 hours ago|||
For me the 24h is buried... But then I can't change the default mm-dd to my country's default dd-mm, which just keeps throwing me off.
make3 10 hours ago||
Maybe it's because the United States is not the whole planet
__fst__ 18 hours ago||
For anyone interested in modding the F-91W there's also The Ollee Watch, a replacement PCB which adds even more "smart" features.

https://www.olleewatch.com/

Sidnicious 17 hours ago||
Sensor Watch is the non-phone-connected OG:

https://www.sensorwatch.net

joombaga 14 hours ago|||
I use one of these daily. Got the expanded screen too. I love the USB design (the side of the board fits inside a USB micro B cable).
gonzalohm 9 hours ago||
I'm curious, which features did you code into the watch?
matheusmoreira 2 hours ago||
I added a calibration feature for the pulsometer. Lets me set how many events I want to count in order to get the answer. Allows me to turn the pulsometer into an asthmometer. Use it every day at work, makes counting respiratory frequency painless.

If I remember right, I also made some improvements to the TOTP watch faces. Even maintained the repository for a bit while Joey focused on getting the Sensor Watch Pro out. Merged a lot of stuff.

gonzalohm 8 hours ago||||
Does it offer anything out of the box or do you have to program everything? It doesn't even seem to track steps
matheusmoreira 2 hours ago||
The movement firmware is open source and it has tons of features. Highlights include temperature compensation for seconds per year accuracy, and a TOTP generator that lets you login like you're James Bond.

People have written orbital calculators for this thing. Even the Chrome jumpy dinosaur game got ported.

raffael_de 15 hours ago|||
not just OG ... also OSS as opposed to Ollee
pepperoni_pizza 16 hours ago|||
It has ... uuuuuh ... blackjack?

Is it did that get implemented solely so someone could say "I'll make my own watch, with blackjack and hookers"?

RobCodeSlayer 18 hours ago||
The developer also recently posted on Reddit that he’ll soon be adding third party app support
ikety 17 hours ago||
Really hoping this will include the ability to sync information from the internet via the BT tethered phone. But probably not

Similar to the current weather feature that grabs the weather for the next 5 days on every sync, I just want to push the local time train schedule just once per day to my watch.

taviso 18 hours ago||
I have one of these, there is an open source project called gshock_api that supports it. I think that makes it a much more interesting device. I don't use the app, I tag alarms in remind, and sync them from cron - works great.

https://github.com/izivkov/gshock_api

The full lifelog (what Casio calls the steps and other metrics) is an opaque binary blob, but we mostly understand it now, so you can access that too.

https://github.com/izivkov/gshock_api/pull/3

woodson 15 hours ago|
This is great, as is the CasioGShockSmartSync Android app. I wish there was an iOS app, as the official app is horrible, only works after signing up for an account, and only works if given every tracking permission possible to vacuum the maximum amount of data to the cloud.
Retr0id 14 hours ago||
Hmmmmmmmm. I've always been a fan of the classic Casio aesthetic, and I want to want it, but this is a strange point in the functionality-vs-price space.

A base F-91W costs less than half that, and my phone can already track steps with reasonable reliability.

An entry-level fitbit costs about the same and monitors way more stats including heart rate, SpO2. Worse battery life and appearance, but if I wanted that featureset it's probably what I'd get.

mrweasel 4 hours ago||
I'll probably be in the minority, but my phone can't track my steps, because I don't have it with me all the time, but my watch is on my wrist. The fitbit requires a Google account, so that's going to be a big no. The Casio might also require an account, I can't tell. The Fitbit has 10 days battery life, the Casio, 2 years.

The price is a bit high, it is basically just a watch with a step counter. I'd also argue that people who buy Casio watches might have multiple watches they switch between, so you'd only put this on when you want to count your steps, and in that case there are better and cheaper options.

stkdump 4 hours ago|||
I recently thought I could probably go back to a not-smart watch to not have to charge the watch all the time, but I don't want to deal with setting the time regularly either due to quartz drift and dst. So a bluetooth watch with two years of battery life doesn't sound like a bad idea really.
TonyStr 2 hours ago||
Even cheap quartz movements tend to drift by ±10 seconds per year, so you'd only really set it at dst. Maybe you're thinking about automatic watches which can drift by several seconds per day, and stop if you don't use it for 24/48/X amount hours. I have to set my automatic quite frequently
stkdump 2 hours ago||
It is usually 10-15s per month. And the annoying thing is you have to notice it and I prefer a watch that I don't have to double check.
slumberlust 13 hours ago|||
Some of us prefer looser fitting bands. Most of smart watch features are useless unless you strap it down tight. I'd bite on something like this if the form factor wasn't off.
CTDOCodebases 4 hours ago||
Simple smart watches make sense for people who want accurate time who don't want to pull their phone out of their pocket for things that can be answered by looking at their wrist.
dingaling 18 hours ago||
Like their G-Shock watches, the actual area dedicated to showing the time is overwhelmed by superfluous elements. Must be barely 20% of the top surface that actually performs its primary function.

When I look at my watch I want to see the time, not wasted space announcing "Casio Step Tracker" or "Water Resist" ( which isn't even proper English).

I moved to Timex a few years ago as their basic digital watches have nice big numerals for the time display.

jq-r 2 hours ago||
There are some editions of their models which don't have any of those labels and they look much better. But I think they never went far enough, and design a good looking digital g-shock with big time and date, nothing else. When I was younger, small time display was fine, but now as someone with presbyopia (like any 40+ adult) those digits are just too small.
kridsdale1 12 hours ago|||
Nearly 50% of today’s $45,000 Rolex Daytona is taken up by superfluous text like this.
iainmerrick 12 hours ago||
Right, that’s why it costs $45,000 rather than just $25,000.
orwin 16 hours ago|||
On the principal menu of my G-Shock, I have the time on ~80% of the screen. The rest is 8/19, WED and the seconds. Of course the time is smaller when I go to the tide screen.
NetMageSCW 16 hours ago||
And what percentage is the screen of the top surface of the watch?
maratc 17 hours ago||
You might wanna take a look at Casio AE-1500WH.
nisiddharth 57 minutes ago||
I have it. I sometimes hate the fake screws on it, but I love it.
wpm 12 hours ago||
BIG Warning to anyone thinking about purchasing one of these

You cannot connect the watch to Bluetooth without a proprietary app, and that proprietary app will not let you use the Bluetooth feature without some bullshit called a "CASIO Account". Their privacy policy is a bit of an eyebrow-raiser too.

The absolute state of things.

ff00 6 hours ago||
There is an Fdroid app "Casio G-Shock Smart Sync" Not sure if it supports now but most likely may support in future.

This is an unofficial app for Casio G-Shock, Edifice, and Pro Trek watches. It allows you to control your watch, sync data, and configure settings without a Casio ID. It offers a faster, privacy-focused, and more powerful alternative to the official Casio app.

Key Features check ------------------ - No Account Required: Skip the Casio ID login entirely.

From https://fdroid.gitlab.io/jekyll-fdroid/packages/org.avmedia....

Ductapemaster 9 hours ago|||
While I empathize with your feelings about lock-in, I encourage you to see that we live in an amazingly empowering era. I would wager that with $20 in credits for the LLM flavor of the week and and an equally expensive BLE-to-USB dongle (try the nRF52840 dongle), you will have the protocol reverse-engineered overnight. BLE protocols are often very low-hanging fruit for this type of effort.

Yes, it's annoying this stuff isn't open source from the get-go, but it has never been easier to open hardware up for yourself and others.

gregsadetsky 8 hours ago|||
+1000.

There should be bounties for open sourcing drivers/apps like these and generally making 'clean'/better interfaces to hardware devices, now that it's so much easier.

Claude Code reverse engineered cheap (Android only) usb and wifi endoscopes here, wrote/flashed/hardware-in-the-loop developed python+arduino libraries, etc.

It's a completely new world.

@wpm, happy to fund the nRF52840 dongle if you want to try this + release code!

jbit 6 hours ago||
Have you released your reverse engineered endoscope camera work? It's something I've been thinking about doing myself, since the vendor apps leave a lot to be desired.
gregsadetsky 5 hours ago||
Yes! https://pypi.org/project/supercamera/

Feel free to contribute [0], let me know if it works with the cameras you have or not, etc.! Cheers

[0] https://github.com/Revise-Robotics/supercamera-endoscope

MicrosoftShill 8 hours ago||||
Is it really as easy as you say? I have one of these Casio watches and plenty of spare Claude credits. Wouldn’t mind doing this but no idea where to begin.
gregsadetsky 6 hours ago|||
Responding to you and @thewhitetulip

If you ask Claude how to do it, it might already give you some strategy that's reasonable (at least, it's good to see what it thinks)

Make sure to use Fable, and preferably have the Max plan (or plenty of credits)

LLMs can do very good work when they're unattended and optimize towards a goal that's unambiguous / for which you have a reference.

Generally speaking, in hardware, this means having a "rig" ie a testbed where the AI can send commands, observe output, and iterate on its own. You want autonomy, not babysitting (as much as possible)

In the case of this Casio watch, I would start by giving Claude Code context on what you're trying to achieve (read&decode messages sent probably over BLE, reverse engineer the protocol, get to a point where it can send valid messages itself). The goal should be a python/command line tool that can sniff packets, decode them, and send them. (step by step, starting with sniffing)

Get the nRF52840 USB dongle mentioned. Have Claude Code talk to the dongle. Ask it to list devices it sees. Ask it to see/detect the Casio watch. Use the proprietary Casio app and ask CC to record the sequence and decode the messages (explaining to it what you did in the app)

Also: have it do research - has this protocol been cracked/documented before? Is there an Android app for this Casio app which could be decompiled (usually more easily than the equivalent iOS app)?

Reach out if I can help - my offer for a dongle stands for anyone who wants to do this! It looks like a cool watch, it shouldn't be held hostage. :-)

panuskadev 5 hours ago|||
Hi Greg, I am Claude Code junior specialist from Czech Republic and also huge Casio fan. I've been ignoring all bluetooth enabled models in the past, since I had a lot of negative experience with proprietary apps (Sony Music Center, Ultrahuman etc). This is not me first time thinking about reverse engineering products app, I love open hardware and I wanted to contribute to the community, but while doing my research (which Claude agrees with), I've figured out that it might not be as easy as I thought. For example, Googles Fitbit Air is according to some encrypting its traffic in a way, that it reaches Googles Cloud first, unencrypts and then reaches the app itself. How would you approach this issue? By the way, the dongle offer still stands? ;)
gregsadetsky 56 minutes ago||
Offer still stands! email me (my email is in my profile)

When there’s a will, there’s a way :) I’m not immediately sure re Fitbit Air (that’s nasty if it’s e2e encrypted!), but… maybe it doesn’t pin the server certificate and you can intercept communications?

Seems like you would have fun reversing this! :) reach out!

Ductapemaster 4 hours ago|||
From my experience Fable will reject this request - its pretty trigger-happy with it's safety detector for reverse engineering, even if you push it on right-to-repair. However Opus 4.8 is more than capable of doing it, with a bit of guidance.
thewhitetulip 7 hours ago||||
Even I am curious about how people are doing this
bowsamic 6 hours ago|||
> Wouldn’t mind doing this but no idea where to begin.

Literally just ask Claude where to begin

mrheosuper 4 hours ago||||
ble is just transport layer, if the actual data is encrypted, you can get nothing.

One of our device FW at first transmit raw data through gatt service, then folk at gadget bridge reverse engineer it, which does not sound good to stakeholder, so we have to encrypt the data between phone-device.

Ductapemaster 4 hours ago||
Quite possible transport is encrypted, but that can likely be overcome with some RE on the Android app. Given the price of this piece of hardware, it's likely recoverable with moderate effort. At least worth a try.
mrheosuper 4 hours ago||
yeah, my point is "1 night and $20 of Claude token" maybe not enough.

Also you dont really need the nrf52840 dongle if you want sniffing(Also unlikely to work after the pairing process is done), you can use btsnoop on Android phone to record data, then analyze it with wireshark.

richstokes 7 hours ago||||
Having the LLM run the proprietary app through ghidra (which I think even has an MCP now), would likely give it some useful clues too
gib444 3 hours ago|||
Q: How can we achieve world peace?

HN: I'd wager that with $20 in LLM tokens ...

Cracks me up every time lol

jp0d 11 hours ago|||
Isn't that common across all watches that connect to your phone these days? Please correct me if I'm wrong.

Edit: Also, not saying it's a good thing.

diydsp 11 hours ago|||
My bathroom scale requires gps access via my phone if I want to log data to it...
Gigachad 10 hours ago|||
From my understanding, apps need location permissions if they want to scan for available bluetooth devices rather than having the user pair in the bluetooth settings app. The reason being that advertisers set up bluetooth beacons all over the place and used passive scanning in apps to collect the users location.

What's not clear to me is why they really need to be able to scan for bluetooth. Surely requesting location permissions is worse UX than having the user go to the settings app to pair.

kube-system 6 hours ago||
The lowest common denominator user is more afraid of visiting the settings menu than they are of clicking allow on just about any permissions popup.
Gigachad 5 hours ago||
[dead]
jp0d 11 hours ago|||
yeah that's not good! That's why I don't want to buy a "smart" fridge or any of these appliances that require Wifi access.
Bud 10 hours ago|||
[dead]
buccal 6 hours ago|||
While Casio app may be despicable, in Android world have a look at https://gadgetbridge.org/.

Gadgetbridge is open source provides a lot of "drivers" for different BT devices from Casio, Sony, Pebble, Garmin to Xiaomi and allows to live without monstrous in size and tracking proprietary apps.

bux93 1 hour ago|||
I complained to the relevant GDPR authority (German) and never heard back. It's blatantly illegal - overprocessing of PII - to require registration for connecting two devices owned by the same person, in the same room. There's no fathomable necessary or legitimate use.
00deadbeef 9 hours ago|||
ffs all it needed to do was talk to Apple Health and I’d have bought it.
compounding_it 9 hours ago||
from a financial perspective they would assume one persons data is worth maybe 50$ a year (a random number) on top of maybe another 50$ in subscriptions they can sell. Assuming most such products service the business for up to 3 years, you are looking at an additional 300$ upfront that the business loses giving the data away to someone like Apple. Also the value gain from purely having such a business of subscriptions and data collection is probably another 100$ per customer. Thats close to 500$ for that thing.

Someone like Casio could just sell it for 500$ and collect their future cashflows right away. However, the customer turnout might be significantly less than 55$ they are selling it for.

So the only way to sell it for profit is to keep the data and make a subscription (which may or may not exist yet for Casio).

00deadbeef 8 hours ago||
They could just sell it at an honest price with an honest profit. It’s an upsell from cheap F91Ws so they could have made more money just by selling me a thing that reads from Apple Health. It doesn’t even need to track steps itself.

I also disagree my email address and step data is worth $450 to them.

Let’s be honest. This thing is not innovative. It’s going to be using cheap commodity chips. Its selling point is nostalgia. I find it hard to believe it’s not already profitable at $55.

nout 5 hours ago||
If the watch gets any popular, it will take at most weeks for someone to vibecode open source app for this.
eloeffler 18 hours ago||
It seems to me that it's a slightly more affordable repackaging of the ABL-100WE. The features are the same, so is battery life.

That said, I really like this because the ABL-100WE comes with metal bands and I'd really like another watch with a rubber band :)

https://www.casio.com/de/watches/casio/vintage/product.ABL-1...

ncruces 18 hours ago|
Right when I started building a custom F-91W with/for my kids based on sensor watch: https://github.com/joeycastillo/second-movement

I'll take some solace in mine supporting lots more alarms (beep when school recess ends) and a bunch of geeky stuff like sunrise, moon phases, tides, and stuff.

maybe_pablo 17 hours ago|
The sensor watch is actually awesome, if only for turning a cheap casio into a super-accurate quartz watch with temperature compensation.
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