Actually I have/had a lot of these. They can only be used with triple a batteries and don't last long. The usb c is only for development (and still lacks power

Actually I have/had a lot of these. They can only be used with triple a batteries and don't last long. The usb c is only for development (and still lacks power so you still need batteries). The typing as maybe expected gets tiring. I tried using different compression ideas to save characters. There is no resend or reliability in the message sending. If it fails you must retype it. I can't remember exactly if it even indicates it fails? I remember testing with two devices, one in a faraday to test bad conditions. In the end they got salvaged for parts from my kids for other projects. The goal was to have a simple backup/emergency communication device and get to learn about LoRa. Not sure which other devices I will try but definitely know more what to look for now.