Product page: https://store.arduino.cc/mkr-gsm-1400

Arduino guide page https://www.arduino.cc/en/Guide/MKRGSM1400

Arduino GSM Library:

https://www.arduino.cc/en/Reference/MKRGSM

https://github.com/arduino-libraries/MKRGSM

Schematic: https://content.arduino.cc/assets/MKRGSM_V2.2_sch.pdf

GSM Specs

3G with 2G fallback

Serial ports

USB connector – virtual serial port using the Serial object

Serial1 – Hardware serial port on pins 13/14, instead

Reset button

Reset button causes the microcontroller to reset and resets USB communication.

IO Pins

IO voltage: 3.3V

Pull Ups

We’ve not checked the datasheet but on setting the following pins to pinMode(#, INPUT_PULLUP) they all changed from measuring around 0V to 3.3V, so pull ups working on all of them:

IO0 – IO5, IO7-IO14 (note IO6 has LED connected so didn’t measure 3.3V)

A0-A6

LED

LED is connected to IO6

USEFUL?
We benefit hugely from resources on the web so we decided we should try and give back some of our knowledge and resources to the community by opening up many of our company’s internal notes and libraries through mini sites like this. We hope you find the site helpful.
Please feel free to comment if you can add help to this page or point out issues and solutions you have found, but please note that we do not provide support on this site. If you need help with a problem please use one of the many online forums.