<2016-03-17 14:33:35> init cellular module, use SIM 1 ATZ ATZ OK ATE0 ATE0 OK AT OK AT+GMM BGS2-W OK ATE0 ATE0 OK AT OK AT+GSN 351535051080372 OK ATI Cinterion BGS2-W REVISION 01.301 OK AT+CPIN? +CPIN: READY OK AT+CLIP=1 OK ATS0=2 <2016-03-17 14:34:07> set auto answer for CSD fail! <2016-03-17 14:34:17> fail to get IMSI! AT+CMGF=1;+CNMI=2,1 ERROR AT+CREG=2;+CREG? +CREG: 2,2 OK AT+CREG=2;+CREG? +CREG: 2,2 OK AT+CREG=2;+CREG? +CREG: 2,2 OK AT+CREG=2;+CREG? +CREG: 2,2 OK