[Verified] ESP32S2 programming and debugging rack (compatible with ESP-12K)

Introduction

The ESP32S2 programming and debugging rack made using a test ring is compatible with ESP-12K. It is inspired by [actual verification] and teaches you how to make the cheapest ESP8266 spring pin programming and debugging rack .

At the same time, the circuit part refers to the ESP32-S2-WROVER technical specifications .

Function

interface

USB

Two Type-C + Type-A interfaces are provided, one of which is used as a regular USB-to-serial interface, and the other group of interfaces can be used as an auxiliary power supply or as a debugging interface for the ESP32S2 native USB interface, and provides a Type-C interface. The DFP and UFP jumpers are installed to facilitate switching of power supply modes.

powered by

It provides 3 groups of 5V and 3 groups of 3.3V outputs separately, with a maximum power supply capacity of 5W.

debug

All pins of ESP32S2 are lead out, and each pin has a female header and a pin header interface, plus a row of unsoldered pads to facilitate the connection of various connectors.

powered by

Using switching power supply for power supply (no linear regulated power supply like other projects), the power supply capacity is strong and can meet the debugging needs of most projects.

indicator light

There are two indicator lights, which are connected to the 3.3V power finger and IO2 respectively.

Precautions

• Resistors R0602 and R0604 can be short-circuited directly without soldering, or they can be replaced by resistors with smaller resistance values.
• The seat is relatively tight. It may be difficult to insert it the first few times, but it will become easier later. If it becomes loose after being used a lot, you can use tweezers to pry it off.
• The USB to serial port is compatible with CH340G and CH340C. When using CH340C, there is no need to solder crystal oscillator X0301 and capacitor C0302 C0303
• In addition to the components in the BOM table, a test ring is also required. For details, please see [physical verification] to teach you how to make the cheapest ESP8266 spring pin programming and debugging rack.
• If you don’t like to use switching power supply, please replace the linear regulated power supply by yourself.
• Diode D0201 is a Schottky diode. Please do not use ordinary diodes instead. You need to ensure that the voltage behind it can be greater than 4.6V.
• Resistors R0201 and R0203, it is recommended to use precision resistors to ensure that the voltage does not deviate from 3.3V
• If you modify the circuit, it is recommended not to use automatic wiring. It is recommended to use differential wiring for USB data lines.

renew

v1.3

• Modify the direction of the capacitor to make soldering easier
• Appropriately expand the size of the spring pin seat to make installation easier
• Added slots to make it easier to remove the development board

v1.2

• formal edition

Introduction and demonstration video

https://www.bilibili.com/video/BV1if4y1t7dE