You need to first check which is the active profile used by the device Eg. Profile 3 or Profile 4. You then need to ensure that the I/O parameters for that particular profile are enabled. For example if you are configuring by sms, then you can check by " getparam 3470" . This assumes profile 3 is being used. After you get a reply from the device, for example Param ID:3470 Val:0, then you can issue the sms command " setparam 3470 1" This will enable the I/O parameter for External Power Supply (Vehicle Battery) for Profile 3. You do the same for 3471, 3472,3473,3474. If you need the device to immediately transmit back the information once the External battery is disconnected, then you need to set 3471 to 1 (or High) or 2 (Panic). You can set 3472 to something like 9 (for 9 Volts) and 3473 to 0 (for 0 Volts). You can set 3474 to 1 (on Entrance). This means that once the External Voltage drops from 12 Volts to between 9 Volts and 0 Volts, the device will immediately transmit back it's position and status. In GpsGate, you need to select the Device Mapper for FM5300 and look for something like External Power Supply and map it to either Battery Voltage or Voltage.