I was recently using a GPS/GPRS/GSM shield for the Arduino.GPS_GPRS_GSM_Module_V3.0__SKU_TEL0051_-DFRobot
I was initially using this on an Arduino 101 but to no avail. I switched to an Arduino UNO and it worked perfectly. I used a 12V 2A external power supply, as recommended on the wiki, in both cases.
I was told this was due to the operating voltage of the 101 being 3.3V and the UNO having an operating voltage of 5V as the AT commands require 5V.
However I have looked online and can't find anything to support this and I'm not sure why it would work on the UNO but no the 101 given that they both used an external power supply anyway?
Any help would be much appreciated.