Gravity: Digital Wireless Switch Kit - Transmit and Receive (433MHz)

The Gravity: Digital Wireless Switch Kit offers an easy-to-use 433MHz RF solution for transmitting digital signals through walls and obstacles without complex network configuration. Designed for students, makers, and educators, it provides a reliable, low-power alternative to Wi-Fi and Bluetooth for remote triggering. The kit operates out of the box with any microcontroller capable of handling standard digital inputs and outputs.

Reliable 433MHz signal penetration

Operating on the 433MHz frequency band, this kit delivers strong obstacle penetration and a stable indoor transmission range of up to 15 metres. It avoids the cumbersome AT command configuration of Bluetooth and the directional line-of-sight limitations of infrared.

Flexible pairing and operational modes

The hardware supports both one-transmit to multiple-receive and one-receive to multiple-transmit setups. It features 15 transmitter button states and provides four selectable working modes: inching, latching, self-locking, and interlocking.

Ultra-low power operation

Operating across a 3.3V to 5.0V DC range, the transmitter draws less than 10uA in standby and 10mA during active transmission at 5V. The receiver maintains low power demands with a 3mA standby and 6mA active current.

Versatile digital control applications

Equipped with four digital interfaces, the kit enables straightforward conversion of wired buttons into wireless controls. It is well suited for remote control triggers, wireless doorbells, and general digital data transmission.

Compact board dimensions and mounting

The transmitter module measures 47 by 32mm and the receiver measures 37 by 32mm. Both boards include dedicated mounting holes with a 3.1mm inner diameter and 6.0mm outer diameter for secure mounting inside enclosures.

Downloads & documentation

• Product wiki (DFRobot)