https://github.com/bleskomat/bleskomat-diy
This is the all you need.
Yes it is open source.
If just change the device, the seed phrase has checksum som if device accepts it. No need to verify everything. But if you create new seed phrase with the new device, you have to verify the backup of the seed phrase is correct. Generate new seed phrase -> enter it in device. Generate public address and send some small amount. Reset the device and recover from seed phrase, if the send satoshis are there. You are good to go. After that make many copies or seed phrase and distribute them to different geographical locations.
#bitcoin solo mining race began for me 
The more i use #nostr, the more i love it.
I’ve made a BTC ATM for new #bitcoin bar in Sofia. It’s very funny and cool little machine that’s help show to no coiners that’s bitcoin transactions is not slow. https://video.nostr.build/d76a1d8463bf94e0f32bda86af53e278466078cd4c3a3237bad8f2e025f9bf92.mp4
Cool vibe at #Bitcoin Bar Sofia 
The least interesting thing about Bitcoin is its price!
To connection to be successful using this address you need to be in the same wifi network.
Локалните ip-та не ги гледай. Този VPN дава други IP-та. Свали го и го разцъкай и ще разбереш.
Ще пиша на бг за по-лесно. В галерията с приложенията намери tailscale. Това е vpn. Който може да инсталираш. И реално да достъпваш компютъра на който ти е umbrel и да посочиш неговото ip.
I don't know if Ms. Lummis is a genius or just not corrupt.But unlike most government-fed people who either don't understand what PoW is or pretend not to.She really works for people's interests. It asks the right questions,and I hope more people listen to them and their answers.
https://twitter.com/bitcoinmagazine/status/1635712402715975680?s=46&t=yjoZ3-yJv3SznymUQ-3DZw