lastchancename:
As you are a complete beginner, with little or no understanding ho how to stitch multiple code elements together, i’d suggest you find a local mentor or special interest group - for two reasons.
a) to guide you through basics,
b) to avoid learning bad habits that will slow you down later.With the smaller Arduino’s, your current schematic has already run out of pins. Adding the modem, or any other functionality will require a bit of thinking (shared pins), or a chip with more i/o.
Coding for Arduino isn’t complicated is itself - the language and rules are extremely well defined and documented, but it is extremely unforgiving while you’re finfpding your feet!
Pls sir. If you have a code for this work help share. Thank you.