I have seen a few posts here on this idea but nothing firm on how it might be done (beyond a kludge). If I missed a post or link please let us know and i will loo at it.
I have an Uno tied to some sensors. I would like for it to send me a text message to my cell phone when i am away from the home if a sensor trips. I am in the USA and we use here at a minimum 4GL.
I can't seem to find any straight forward way to do this.
I have looked but it appears (unless I am not understanding what they are saying) they use WiFi. I am looking for my sensors to tell me if I am out of town for instance. I will search again: perhaps I just missed it.
I have seen 2GL boards. In the USA (Where I live) we have now almost exclusively 4GL so these 2GL boards can not be used. The other methods I saw were essentially WiFi: that will not work when i am out of town for example. I have looked but do not see any USA-compatible / 4GL true cell phone (not WiFi) hardware available. I am new to trying this idea. Please bear with me...
Are you know what is SMS?
It is a mobile operator service that allows user to send and receive a short text messages. It does not use WiFi and internet in general.
Only a bit... I am learning right now. I assume I must have an internet connection to use it. I know you said no internet connect needed but what I have read it does require access to some sort of web server...
I want my system to be internet-indifferent (ie: can be used in the deep back woods where there is no power or internet connections). Please bear with me: I am still learning about the subject.
There are a couple that do that, but most don't. This one, for example: Arduino Project Hub
Many tutorials are outdated as the old phone networks have been shut down. As stated above, you need a USA compatible 4G module. Arduino claims to sell one. See this long thread on the Adafruit forum: https://forums.adafruit.com/viewtopic.php?t=194216
I want my system to be internet-indifferent (ie: can be used in the deep back woods where there is no power or internet connections).
In the USA, many places do not have cell phone coverage.