/challenges-projects/design-challenges/designforacause/b/blog/posts/week-9ish---code-and-function-overviewThe Arduino MKR1000 has the ability to send and receive serial data, and this is used to communicate with and control the GSM board. In this way it can initiate phone calls, as well as send and receive text messages. The audio comes from the DAC pin en-USTelligent Community 12