OmarKhan
Newbie level 1
Hi
I am developing a tracking system using your SIM908 modules. Previously we have used the SIM508 and SIm548C modules. The problem i'm facing is that when i send the "AT+CGPSSTATUS?" command via the serial port, i get the response "+CGPSSTATUS: Location Unknown" and "AT+CGPSINF=0" gives message "0,0.000000,0.000000,0.000000,20101010000641.000,0,2,0.000000,0.000000 OK". The debug/GPS port of the module (pin 15,16) give a continuous High value no NMEA info even though i have sent the "AT+CGPSOUT=255" AT command. My firmware revision number is "Revision:1137B01SIM908M64_ST_DTMF_JD_EAT". I have connected the GPS_VANT_IN to 4.0 volts as i'm using an active antenna with a 3-5 volts range. The GPS_VANT_Out pin is unconnected. Please help me in resolving this issue, as it is very important for us.
Awaiting your prompt reply.
Regards
Omar Khan
- - - Updated - - -
Please also suggest the most suitable GSM and Active GPS antenna for SIM908 Module.
I am developing a tracking system using your SIM908 modules. Previously we have used the SIM508 and SIm548C modules. The problem i'm facing is that when i send the "AT+CGPSSTATUS?" command via the serial port, i get the response "+CGPSSTATUS: Location Unknown" and "AT+CGPSINF=0" gives message "0,0.000000,0.000000,0.000000,20101010000641.000,0,2,0.000000,0.000000 OK". The debug/GPS port of the module (pin 15,16) give a continuous High value no NMEA info even though i have sent the "AT+CGPSOUT=255" AT command. My firmware revision number is "Revision:1137B01SIM908M64_ST_DTMF_JD_EAT". I have connected the GPS_VANT_IN to 4.0 volts as i'm using an active antenna with a 3-5 volts range. The GPS_VANT_Out pin is unconnected. Please help me in resolving this issue, as it is very important for us.
Awaiting your prompt reply.
Regards
Omar Khan
- - - Updated - - -
Please also suggest the most suitable GSM and Active GPS antenna for SIM908 Module.