Firmware version 20170403, multi-function, AVR chip memory usage has reached the occupancy limit, can no longer increase the command control.

AP510-AVRT5 AT command

Set the Callsign: BG6QBV-7
AT + CALL = BG6QBV7 

Set the frequency: 144.640MHZ
AT + FREQ = 144.6400 

Set the Beeper:ON/OFF
AT + BEEP = 1 open 
AT + BEEP = 0 OFF 

Set the STATUS TEXT(Max 48 char)
AT+STAT=..............

Set the COMMENT TEXT(Max 48 char)
AT+COMM=..............

Set the Energency TEXT(Max 31 char)
AT+ENER=..............

Set the Receive audio output amplitude (Rx Volume)
AT+RX=5
(volume 1-9)

Set The audio level in the transmission (Modulation transmitter )
AT+TX=6
(mod 1-6)

   bg6qbv & bi7nor   2017-12-4