2. The ZX-D50 is a low-power Bluetooth module specifically designed for proximity switch applications by Shenzhen Zhixing Micro Technology Co., Ltd. This module uses the Bluetooth 5.1 protocol and has excellent stability and compatibility. The module supports direct connection to the system's Bluetooth, with automatic reconnection without contact, requiring no app. It supports momentary and constant-on modes, and allows modification of Bluetooth name, pairing password, connection distance, and other parameters via a WeChat mini-program. 
3. Component pin diagram 
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