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 on the lookout for. In contrast to the tremendous low-cost ISM units that ship a single UART stream, the SympleLink has firmware which might deal with a UART, an I2C bus, and 4 GPIO! That’s sufficient to manage absolutely anything on the receiving finish.
Every gadget has a singular handle, and can solely join and talk with its related central gadget. The units 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 kind 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 gadget; licensed beginner radio operators could possibly use these units in the event that they adjust to all of the necessary rules (together with transmitting your callsign) nevertheless it’s finest to verify the legal guidelines in your nation.