43 Wireless 2.4G RF Receiver Module 7-Channel I/O Control

The module features a built-in learning mode. Typically, you apply power, trigger a specific pin or sequence to enter learning mode, then press the button on your remote transmitter. The module's LED will indicate successful pairing. The learned ID is stored in non-volatile memory, so re-pairing is not needed after power loss. Consult the specific timing diagram for your remote's protocol for precise steps.

The seven I/O channels are digital output pins that can be toggled high or low based on commands from the paired remote. Each button on the remote can be mapped to control one or more of these outputs, allowing you to wire them directly to relays, LEDs, or other actuators. The module handles the RF decoding and output switching internally, so no microcontroller code is required to manage the basic on/off functions.

Yes, the module's wide voltage range of 1.8V to 3.6V makes it directly compatible with the 3.3V power rail from boards like the ESP32, Raspberry Pi Pico, or STM32. Ensure your board's 3.3V regulator can supply the module's operating current, which is higher during RF reception than the 24µA idle current. Connect the module's VCC and GND pins to your board's 3.3V and ground, and connect the desired I/O pins for control.

The specified 100-meter range is achievable in open, line-of-sight conditions with the integrated PCB antenna. Range reduces significantly through walls or in noisy RF environments. To improve range, ensure a clean 3.3V power supply, avoid placing the module near large metal objects, and orient the board for best antenna radiation. The module does not have an external antenna connector, so the PCB antenna's placement within your enclosure is critical for performance.