For Operation Mode 4(Setup mode) connect FTDI USB to serial converter to LoRa and leave pins 6(P2) & 7(P1) alone do not connect it with ground. read and write after configuration test by operation mode 1 (connect ground to pins 6 & 7).
For Operation Mode 4(Setup mode) connect FTDI USB to serial converter to LoRa and leave pins 6(P2) & 7(P1) alone do not connect it with ground. read and write after configuration test by operation mode 1 (connect ground to pins 6 & 7).