ESP Prog

ESP Prog is ESP32 Programmer board.

It can be used in multiple ways like use it for programming ESP8266, ESP32, or any other microcontroller which needs boot Pin and Reset Pin control along with UART RX, and TX for flashing the MCU with a new program.

Or, one can also use it as a USB to UART adapter.


  • Compact size: 50mmx30mm
  • USB-C Type Interface: you can connect a USB in any direction. Use USB-A to USB-C Cable.
  • LEDs for Power, RX, TX
  • Switch for Reset and Boot
  • Both 3.3V and 5V are available on the O/P connector
  • All signals on a standard 2.54mm Pitch Header (Header will come along with the board (unsoldered))

ESP Prog Pinout

  1. 3.3V DC (100mA Max.)
  2. TXD
  3. RXD
  4. GND
  5. Reset/RTS
  6. Boot/DTR
  7. GND
  8. 5V DC (500mA Max.)

ESP PROG Connections

Connection with Custom Hardware

Application Board – 1


Our packaging is as you see below. In the future, it will be in the Zip lock ESD bag.

An 8-Pin 90-degree angled male header is included in the package.

Each unit is ~7.6 grams

Why did We design the ESP32 Programmer Board?

We at CAPUF Embedded aim to build tools that empower companies and their engineers to build embedded products easily.

In the last couple of months, we designed quite a few custom-embedded products for our customers where we used ESP32 for Wi-Fi connectivity.

The challenge we faced was with the ESP32 Flash programming once the board is ready.

There is no ESP32 programmer board available in the market that can be used for programming the production boards easily.

Atleast we were not able to find it easily which we can buy and use it.

Do you know any, please do share them with us.

To handle the situation, We had to use readily available ESP32 Dev kits, we took out the ESP32 modules from them, and then took RX, TX, Boot, and Reset pin along with 3.3V and GND signals onto a header connector via small cable and used it as ESP32 programmer.

See, it looked like shown below 

That’s when it struck our mind that this could be a useful board for hundreds of companies that are building embedded products using the ESP32 module.

They might also be struggling as we did. That’s how this board came into existence.

What is the cost and how to buy it?

You can buy from our Online Distribution Partners.

Our Partners in India

rare components

Our Partners in North America