I had some mates ride motorbikes from Brisbane to London, they posted a few edits of their trip: https://www.youtube.com/watch?v=_UDe9IsPrX4
HN user
electronW1zard
I've used one of these ESP32-S3 watches: https://www.waveshare.com/esp32-s3-touch-amoled-2.06.htm
You can write code using the Arduino IDE and there's a lot of Arduino/ESP32 libraries for MQTT, HTTP Clients, Websockets.
The issue the top level comment was pointing out was the use of hydrogen in its form as an elemental gas (H2). Not the use of hydrogen in chemical compounds. Already chemical production plants that use elemental hydrogen as part of their processes have to take into account its issues with causing metal embrittlement and that it can escape pressure containers through diffusion.
If you have a hydrogen energy supply chain and are storing hydrogen in vehicles, service stations and a lot of other infrastructure, escaped hydrogen may start causing structural issues in structures that were never designed with hydrogen storage in mind. If we transition to hydrogen powered cars, parking garages may have to be redesigned to handle metal embrittlement caused by accumulated hydrogen leaks from vehicles.
I think the developer doing this is: https://github.com/obaraelijah
And it looks like he's done the exact same with a pen-testing project called Kraken: https://github.com/myOmikron/kraken-project
Probably trying to pad out his Github for freelancing.