Generic 42 Multi-Function 2.4GHz RF Module w/ PCB Antenna

The module uses a proprietary 2.4GHz RF protocol supporting both transparent serial data transmission and discrete switch control commands. Data packets can be sent with or without acknowledgment (ACK), allowing for flexible implementation in remote control or telemetry systems. Developers typically configure the module via UART AT commands or pre-programmed firmware for specific control actions.

Power the module within its 1.8V to 3.6V DC range, connecting VCC and GND to a stable source. Interface via its UART (TX/RX) pins for serial data mode or dedicated GPIOs for switch control mode. Ensure proper logic level matching if your MCU operates at 5V. The module's low 20µA idle current makes it suitable for direct battery connection, such as a 3V coin cell or LiPo pack.

No, this module features a fixed, integrated PCB trace antenna with a -3dBi gain and is not designed for an external antenna connector. The antenna is impedance-matched and tuned for the 2.4GHz band during manufacturing. For optimal range, ensure the PCB antenna area is kept clear of ground planes or metal obstructions within your enclosure design.

The specified 100-meter range is achieved under ideal line-of-sight conditions with +5dBm transmit power. In typical indoor environments with walls and interference, expect a practical range of 20-30 meters. Range can be extended by optimizing placement, reducing data rate, or using a receiver module with higher sensitivity. The -95dBm receiver sensitivity helps maintain a stable link at the edge of its range.