The phone will communicate with your network over wifi, and replaces both the Raspberry PI and the HAT.
Oh wow. Various types of monitoring use cellular, house alarms etc.
Are those things just using LTE now?
For outgoing SMS, have Tasker or Macrodroid watch an email inbox and send emails to that inbox with a format like email subject line = recipient phone number, email message body = SMS body. Then parse it through those automation apps and have it send the SMS for you.
I did something like this before and it worked decently well but I haven't had the best luck with getting Android apps to run stable for long periods of time without manual intervention. Not sure if it was battery optimization settings or what.
For the longest time these were exclusive features to telegram compared to Signal:
* Delete messages at other party ("undo"), critical for deleting accidentally sent nudes. * Username only communication * Stickers (silly, but well kinda fun) * Bots (very easy to make your computer talk to your phone or a group this way) * link preview * Self messages as easy link/file sharing between devices. Super useful.
Signal is slowly catching up, but it's so buggy at times, I am starting to really hate it/distrust it (I also dislike MM's personality/opinions). Matrix seems to move at a better pace, with more useful features already (e.g edit, markdown, some fun things). I am happy to get rid of telegram for Matrix. One feature better then the other already: resync of lost messages from the distributed network and no reliance on telephone numbers as UID.
Edit: and now with the New Groups you can send people a group link so that they can add themselves. Haven't tried that out yet but that seems pretty cool
* That has any reach beyond the people who would scoff at this sentence.
Or Slack?
Then you can use any SIP client on your iPhone to connect to that Asterisk and make/recieve calls.
Edit: I just noticed that Gammu is still a thing and even used in this article.
I haven't found something like that.
The hat itself is somewhat expensive (for only GSM), especially compares to LTE USB sticks which can do the same (and more). But of course not as compact and nice looking.
So instead I have a stack of SIM cards plugged into GSM USB sticks (like this mostly is) and get the inbound messages sent to me via Pushover notification.
Do you use just one SIM card at a time, or do you have a usb stick that can hold (and operate) multiple SIM cards simultaneously?
The last I looked, SMS was also cheaper and lower power than mobile data.
We were able to use a LoRa-like layer to forward to a base station that then uses a VoIP provider to do the brunt of the communication work.
For fun
For the serial AT modem I use random Huawei LTE USB stick that I bought for 15 EUR years ago.
It was so cheap because it was provider locked, but there are keygens floating around internet that allow unlocking it to work on any network.
