Description
The HC-42D Bluetooth 5.0 BLE Serial Port Module is a digital transceiver designed for low-power IoT and embedded applications. Based on the Bluetooth Low Energy (BLE) v5.0 standard, it operates in the 2.4GHz ISM band using GFSK modulation, providing a reliable wireless link for transferring sensor data or control commands.
Engineered for minimal power draw, the module supports deep sleep modes with a shutdown current of just 0.3μA, making it suitable for battery-powered deployments. Its primary interface is a UART serial port, allowing straightforward communication with microcontrollers like Arduino, ESP32, or STM32, using standard AT commands or custom data framing for device pairing and data exchange.
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