User Manual

Several things must be checked in order to be sure that the device is ready to send and receive
calls and SMS.
HE910V2 family does not support autobauding. Users have to set the right speed for serial
communication before device initialization. If HE910V2 family set the right speed, the device
responds with OK. The default baudrate is 115200.
 send command AT+IPR=<rate><cr>
 wait for OK response
where rate is the port speed and can be
300,600,1200,2400,4800,9600,19200,38400,57600,115200,230400,460800,3200000,4000000
bps.
The USB or serial port suggested setting is: port speed 115200, character format 8N1 (8 bit
per char, No parity bit, and 1 stop bit)
The first thing to check is the SIM presence and PIN code insertion. This can be done with the
following commands:
 send command AT+CMEE=1<cr>
 wait for OK response
 or if you prefer the verbose format instead of the numerical format then: send
command AT+CMEE=2<cr>
 wait for OK response