Hi all, I have decided to delve into the realms of Arduino programming in order to expand my horizons. My coding experience is rudimentary at best and I would like some feedback on my first attempt at writing an Arduino sketch. The idea is to receive a SMS from a third party and turn on or off a specific light depending on the contents of the SMS. This sketch uses an UNO, with a Tinysine GSM Shield and an Arduino 4 Relay Shield. Whilst this sketch functions as intended I would really like to know if I could have perhaps done it a different way. As I said, please let me know what you think. Code is below;
PS: I am too old and grumpy to deal with trolls so if you fall into that category please move along.
PPS: I tried to paste the code into the post but got told I exceeded the 9000 character limit so I have attached the file instead.
Main_program_v1.1.ino (15.3 KB)