800L-SMS

THIS IS A WORK IN PROGRESS

Things that could help.

Update Line 7 in the src/main.cpp, SMS_TARGET with the number you want to send to, // SMS_TARGET Example for UK +44XXXXXXXXX
If Sending from an iPhone make sure you send as SMS, I had to disable iMessage settings.
At some point in the future the 2G/3G networks will be disabled or turned off, so the 800L will likely stop working.
Used Platform IO Extension for VS Code, so you may need to add it to your instance of VS Code.
There are companies out there that provide IoT SIMs which seem much cheaper than the normal companies, although they seem to use the same infrastructure. The one I have signed up for is https://www.soracom.io/, awaiting the SIM to be delivered as of 05/09/2023.
Tested in the UK on the EE Network and found out the hard way the Pay-As-You-Go Sims stopped working after 6 months of no activity.

RamblingGeekUK / 800L-SMS