This is pretty cool but I think it doesn't focus enough on the fact that code which isn't run / tested regularly is most certainly broken.

Some friends at Antmicro developed a little tool called "tuttest" (https://github.com/antmicro/tuttest) designed to enable you to run your code examples on CI. It still needs a lot of work but we are starting to use it in a lot of places. The tool in the future could potentially use a docable compatible metadata for the best of both worlds!

If you buy the Tomus from CrowdSupply (https://www.crowdsupply.com/sutajio-kosagi/tomu) it comes injection molded case designed by Sean 'xobs' Cross (who actually ran the campaign).

Doing plastics is well outside my skill set, so it was awesome to see him do that! xobs posted about the case here -> https://www.crowdsupply.com/sutajio-kosagi/tomu/updates/fina...

Sadly, I don't think there is a bigger EFM32 which has the same footprint but maybe they have released new parts since I last looked.

IIRC GnuK uses the chopstx library which has already been ported (see https://github.com/im-tomu/chopstx). Not sure what else would need to be done?

The idea is to be an open source, cheap replacement for an Yubikey Nano style devices (and hopefully in response they will price their devices more reasonably than the >$50 USD it costs now).

I would love what happened to the "blue pill" to happen to the Tomu board. It would be awesome for Chinese manufacturers to take the design and make cheap clones.

Buy a 100 pack, then they are only $9.05 each, which while still more expensive than the ESP8266s (at ~$7.00) is getting closer. The devices from CrowdSupply all ship with nice injection moulded cases.

You are also quite welcome (and encouraged) to build your own!

The schematics, PCB and even case design are open source. The board is designed with 6mil/6mil design rules making it compatible with everything like OHS Park, Seeed, or Dirty PCBs (all of them have been previously tested). The Tomu being so small with the Dirty PCB protopack would get you like ~75-125 boards for like ~$25 USD. All the other parts are available from Digikey too.

The idea is to be an open source, cheap and hackable replacement for an Yubikey Nano style devices (and hopefully in response they will price their devices more reasonably than the >$50 USD it costs now).

It would be awesome for Chinese manufacturers to take the design as is and make cheaper clones.

We have a policy of sending anyone who sends the project pull requests free Tomu boards.

Suggesting someone waste $870 by buying 100x as many as they need is not helpful. Your numbers for the ESP are wrong - I can get one for less than $2. https://www.aliexpress.com/item/Free-shipping-ESP8266-serial...

Yea, even the ESP32 on a more user friendly package like NodeMCU or WeMos are still under $5. So he appears to really be downplaying the markup.

If you think you can do better, please do! I will be sure to buy plenty when you deliver your cheaper version.