When WiFi doesn’t go far sufficient, and LoRa goes to interrupt the financial institution, there’s at all times the great world of ISM band radios! The SympleLink radio system from Raging Bits may simply be what you’re in search of. In contrast to the tremendous low-cost ISM gadgets that ship a single UART stream, the SympleLink has firmware which may deal with a UART, an I2C bus, and 4 GPIO! That’s sufficient to manage absolutely anything on the receiving finish.
Every system has a singular tackle, and can solely join and talk with its related central system. The gadgets are able to as much as a 1/2 mile (800m) transmission distance if line-of-sight is feasible. A single Central module can talk with many Peripheral boards, and the included documentation is sort of detailed and can have you up and operating very quickly.
The SympleLink makes use of the LPD433 band, which signifies that it’s solely authorized to make use of in Europe and Malaysia as an ISM band system; licensed beginner radio operators could possibly use these gadgets in the event that they adjust to all of the vital rules (together with transmitting your callsign) but it surely’s greatest to verify the legal guidelines in your nation.