Two T -beam's can not send messages each other

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What kind of radios are you using? Are they both flashed with the same firmware using flasher dot meshtastic dot org?

Thanks, 433M,YES, hardware is T-Beam with M8N and SX1276, flasher dot meshtastic dot org not include this hardware. so,I selected latest firmware version,found error:invalid header: 0x40001c68. flashing failed

Which firmware version should T-Beam with M8N flash?

Solved. must use CLI mode

Oh that is interesting. I don’t I have ever used the CLI mode before. I should pry learn hot to do that at some point.
I am using Arch Linux and Opera for the “chrome-based” browser and that seems to work pretty well so far.

BTW, where did you find the correct firmware?

Download the required firmware from GITHUB