Some boards (like the Arduino Nano), cannot supply enough current for the SX127x in TX mode. This will cause lockups when sending, be sure to use an external 3.3V supply that can provide at least ...
If SPI is not already enabled, load it on boot: Using pin 15/GPIO 22 for CE, pin 24/GPIO8 (CE0) for CSN Can use either RPi CE0 or CE1 pins for radio CSN. Choose any RPi output pin for radio CE pin.
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