First, apologies if I get some things wrong - I've read a bit here but am NEW to all of this. I need to control relay on/off for disbursed devices on a property that is far from me (but still in the same US state). I'd like to have a main GSM controller - such that all commands that would control the many gates and devices could be sent via SMS - to the one main controller. Then, that controller sends RF signals to actually open/close the relays - starting or stopping the devices. I'd need to be able to control "how long the button is pressed" for some of these situations/devices. If possible, I'd also like to do some of the management of all this via computer. I saw a video on Reyax 915mhz LoRa transceivers and that seemed like a possible solution (to sit resident with the impacted devices)... but still have to figure out many things - including what RF signals to send and how... all based on GSM controller. Hope this stuff is making sense... again, I've just started to learn about this. If you have project or hardware (or other) suggestions for me, I'd appreciate it.
You describe a number of components You want to use but not really what goal You want to reach.
Try again.
start by saying what a GSM controller is, and does. GSM, to me, is some kind of euro cell phone.
this is not a take you by the hand and guide you forum. this is a place where you are expected to have done your homework, and you come to get clarification of things you have studied but do not yet comprehend.
look in the project hub here for similar projects.
AD: Take a look at www.SL4P.net
swoop80:
I saw a video on Reyax 915mhz LoRa transceivers and that seemed like a possible solution
Avoid UART front ended LoRa modules, unless you are very confident you can program them to do exactly what you want. Most of these UART LoRa modules are highly restricted in the level of detail to which you can configure them and libraries (if any) are few and far between.
The standard SPI based LoRa modules, whilst they do require maybe 3 more IO pins to drive them, can be configured in fine detail if you need to, are supported by several extensivly used Arduino libraries and there are gazillions of worked example programs out there.
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