I have a project where I need to have a transmitter with 8 programmable buttons that sends a signal to 6 or 7 receivers with a relay for a momentary latch. The receivers can be powered by either 24vdc or 115ac. I need a range of 100-200 yards line of site.
Any suggestions would sure be appreciated.
I have tried LORA... Its not best suited to simple radio transmission... The distance is brilliant but the packets are designed for large data transfers..
If you follow users of the Arduino platform ( Just because they are readily available and cheap) there will be loads of different modules with code..
I have tried LORA... Its not best suited to simple radio transmission... The distance is brilliant but the packets are designed for large data transfers..
If you follow users of the Arduino platform ( Just because they are readily available and cheap) there will be loads of different modules with code..
I suspect those may be illegal to use in both the UK and US, without special licencing.
There are very strict regulation on RF power emission in the 433 MHz band; also "type approval" in needed in the UK.
A Short Range Device (SRD) is a general term, applied to various radio devices designed to operate usually on a license exempt basis, over short range and at low power levels. This includes devices such as alarms, telemetry and telecommand devices, radio microphones, radio local area networks...