The CH34X family comprises widely used USB‑to‑serial chips manufactured by WCH (WinChipHead), commonly integrated into generic UNO R3, ESP8266, and ESP32 development boards.
Overview
This module allows for the charging of a lithium battery via a solar panel with 4.4V – 6V output. The module uses the CN3065 charger controller chip to provide constant current and voltage linear charge to a single cell Li-ion and Li-Polymer rechargeable batteries. The module also features a built-in micro-USB output to support USB charging.
Features:
- Solar panel input: 4.4-6V
- Max charge current: 500mA
- Interface: 2-pin JST connectors
- Short circuit protection
- Battery status indication
- Red: Charging
- Green: Charged
- Supports USB Charging via the built-in micro-USB connector
- Dimensions: 40mm x 20mm

Solar Lithium Battery Charging Board CN3065
$49.99
Tutorial
HC-05 Bluetooth Module and Arduino Beginner Tutorial
This is a basic example to get you start with HC-05 Bluetooth Module. Depending on your specific requirements and the functionality you want, you may need to expand and modify the sketch accordingly.
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