GE863- GPS (AT#GPSACP not working)

Wireless & IoT
1

I have make a pcb and soldered GE863-GPS that PCB.

In that, i am getting the GPS data from the NMEA port and no data replied by the module when i issue AT#GPSACP command.

I have connected GPS control serial port and Sirf binary serial port(TX_BIN_GPS) and (Rx_Bin_GPS) pins.

I dont have Oscilloscope, so i tested with multimeter. I found that all serial ports(both Tx & Rx pin) has the output voltage of 2.8voltage wrt ground. But the Tx_Bin_GPS (ball no:80) donot show any voltage. Is it problem?

  1. Can we check serial post using multimeter?

  2. Please suggest any other way to check, whether that ball has soldered properly & how to check serial port.

please help me to rectify this as i have to complete this project quickly.