4-Channel Wireless RF Remote Control Transceiver Module (315MHz, Non-Locking)

Connect the receiver's 5V pin to a stable 5V DC power source and GND to ground. The four data output pins (D0-D3) and the VT (valid transmission) pin are logic-level outputs. Connect these pins to digital inputs on your microcontroller, like an Arduino GPIO. For maximum range, solder a 17cm wire to the ANT terminal as a quarter-wave antenna. Ensure the onboard inductor coil is not disturbed during handling.

This module is configured for Non-Locking (momentary) mode. In this mode, pressing a remote button makes the corresponding receiver data pin go HIGH only for the duration of the press. Self-Locking mode toggles the output state with each press, latching it HIGH or LOW. Interlocking mode ensures only one output is HIGH at any time, like a mutual exclusion switch. The operating mode is fixed by the decoder chip on the receiver and cannot be changed via software.

No, this system uses fixed-code encoding. Each transmitter has a unique, factory-set ID burned into its IC. The receiver is pre-learned to recognize only its paired transmitter's ID. You cannot add new transmitters or change the paired ID through user configuration. For multi-transmitter setups, you would need a receiver-decoder system that supports learning or rolling codes.

The VT (Valid Transmission) pin acts as a carrier-detect indicator. It outputs a HIGH logic level whenever the receiver successfully demodulates a valid RF signal from its paired transmitter, regardless of which button is pressed. This signal can directly drive a small relay, an LED indicator, or serve as an interrupt trigger for a microcontroller to confirm wireless activity before reading the D0-D3 data pins.

To maximize range, ensure a clean 5V supply to the receiver and use a full 12V battery in the transmitter. Attach a proper 17cm (quarter-wavelength) wire antenna to the receiver's ANT pad. Orient the antenna vertically and keep the system away from large metal objects or sources of electrical noise like switching power supplies. Operating in an open, line-of-sight environment will achieve the stated 3-5 meter range.