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Bluetooth virtual serial port debugger

Overview

BLE-SER_CH9140 Bluetooth←→ serial port module creates a virtual serial port directly on the computer, which is basically the same as the ordinary serial port. WeChat applet and mobile APP can also link to the Bluetooth module for serial port testing.

Measured charging current 5V/0.109A

The battery uses a long-collected 200mA 3.7V lithium battery. In order to stabilize the output voltage at 3.3, the discharge is from 4.2 to 3.3.

Not connected after power on: 8.5mA

Power-on connection current: 9.5mA

Current when sending when turned on: 11mA

Can output 3.3V for external debugging

You can also just solder the module and pin header and use external power supply (3.3V) directly.

After fully charging for 8.5 hours of continuous use, the measured battery voltage is 3.849V (the battery is slightly pregnant)

physical front

Front view

The reverse side of the object

PC software screenshots

Design Files

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Update:2025-06-25 02:42:34

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