

Pin header to select power supply

The pin header in the middle is the power input pin for each interface. When this pin is

connected to 5V, the power output of the interface is 5V. When this pin is connected to 3.3V,

the power output of the interface is 3.3V.



IO0 On/Off Pin

Pin IO0 can be set to select ESP8266's and ESP32's boot modes. This pin can be used as a

common GPIO, after the chip is powered on. Users can then disconnect Pin IO0 manually to

protect the operation of the user board from the influence of ESP-Prog's automatic

downloading circuit.

4. Step by Step Instruction

1. Connect the ESP-Prog board and the PC USB port via a USB cable.

2. Install the FT2232HL chip driver on your PC. The PC then detects the two ports of ESP-Prog,

indicating that the driver has been installed successfully.

3. Select the output power voltage for the Program / JTAG interfaces, using pin headers.

4. Connect the ESP-Prog and ESP user boards with the gray flat cables provided by Espressif.

5. Start automatic downloading or JTAG debugging, using the official software tools or scripts

provided by Espressif.

5. Useful Links



Espressif's Official Website



How to buy: espressif_systems (WeChat Account), Purchase consulting



ESP-Prog schematics, PCB reference design, BOM



Introduction to the ESP32 JTAG Debugging



Flash Download Tools (ESP8266 & ESP32)



FT2232HL Chip Driver

https://github.com/espressif/esp‐iot‐solution/blob/master/documents/evaluation_boards/ESP‐Prog_guide_en.md/621‐19