I would like to add GPS functionality to my Audiomoth 1.2.0. boards. This could hopefully be done by making connections to GPIO b9, b10 and a8 (as well as the supply of 3v off course)
I am looking at ADA-5440 (Adafruit Ultimate GPS Breakout with GLONASS + GPS - PA1616D) for instance.
Might this work?
Thanks,
Eric
Hi Eric, There will likely be a GroupGets campaign for the GPS boards in the near future. Or contact andy@openacousticdevices.info if you need them earlier. The standard GPS board uses the PA161D and PA1616S modules, and the schematic for the board is shown here in the Application Note here - https://github.com/OpenAcousticDevices/Application-Notes/blob/master/Using_the_AudioMoth_GPS_Board/Using_the_AudioMoth_GPS_Board.pdf. We use a MOSFET to power the module and switch it on and off from the firmware. The PA1616S uses about 20mA whilst tracking, and the PA1616D about 40mA. An individual GPIO pin alone can only supply about 20mA. We power the battery backup circuit of the GPS module continuously so that it uses warm start whenever possible. We only use the PPS and the TX outputs of the module. Alex