OK
SRING: 1
// UDP data from a remote host available
AT#SI=1
#SI: 1,22,23,24,0
// 24 bytes to read
OK
AT#SRECV=1,24
#SRECV:1,24
message from second host
OK
AT#SS=1
#SS: 1,2,<LocIP>,<LocPort>,<RemIP2>,<RemPort2>
OK
Remote host has changed, we want to send a reponse:
AT#SSENDUDP=1,<RemIP2>,<RemPort2>
>response to second host
OK