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.
Any update / suggestions are welcome.
Thank you in advance.
There are lots of tutorials on line showing how to do that. Have you tried any of them?
Search phrase "arduino send sms".
There are boards that can make it easier, Uno is not one of them
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.
See the sim7600 module.
I have no idea if it will work in USA mobile networks, but they promise 4G support
From what I have read it should work. Thank you! It requires "arduino SMAD" board support and I an fighting with my Arduino IDE to install it LOL...
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Many tutorials are outdated as the old phone networks have been shut down.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.
An option that is more expensive to build, but works anywhere in the world, is a satellite modem. This one works well: RockBLOCK Mk2 - Iridium SatComm Module - WRL-13745 - SparkFun Electronics
Cost-effective for infrequent, short messages, but you do need a clear view of the sky.
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