A versatile UART programming board designed for microcontroller development with flexible voltage selection and multiple connection options. Features built-in status LEDs, CH340C USB-to-serial conversion, and support for external programming fixtures.
- USB-to-Serial IC: CH340C for reliable USB communication
- Voltage Selection: Jumper-selectable 3.3V or 5V operation
- Status Indicators:
- Power LED (PWR)
- TX/RX activity LEDs
- Connection Options:
- Standard pin headers for jumper wire connections
- FCP slot for external fixtures
- Interface: Standard UART (TX, RX, VCC, GND, BOOT, EN)
- Power Supply: USB-powered with onboard voltage regulation
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Driver Installation
- Install CH340 drivers for your operating system
- Windows: Download from manufacturer or use Windows Update
- macOS/Linux: Usually plug-and-play
-
Voltage Selection
- Set jumper to 3.3V for ESP32, ESP8266, and other 3.3V microcontrollers
- Set jumper to 5V for Arduino and 5V-compatible devices
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Connection Methods
Method A: Direct Jumper Connections
- Connect VCC to target microcontroller's power pin
- Connect GND to target ground
- Connect TX to target RX pin
- Connect RX to target TX pin
- Use BOOT and EN pins for programming mode control (ESP32/ESP8266)
Method B: External Programming Fixture
- Insert compatible pogo pin module into FCP slot
- Align fixture with target board
- Programming connections are made automatically
-
Programming
- Open your preferred serial terminal or IDE
- Select the correct COM port
- Set appropriate baud rate (typically 115200)
- Put target microcontroller in programming mode
- Upload firmware
-
Status Monitoring
- PWR LED indicates power is applied
- TX LED flashes during data transmission
- RX LED flashes during data reception
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