ESP automatic download module (integrated CH343P and CH340K) (verified)

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The ESP series automatic download module integrating CH343P and CH340K can be selected to build an automatic download module based on any chip as needed. The module is about 200*400, which is very small!

The cost is about five dollars! If you have all the resistors and capacitors on hand, the cost will only be one or two yuan!

Schematic design instructions

PCB design instructions

The front of the PCB is the CH340K module and automatic download circuit, and the back is the CH343 module circuit.

When welding CH340k and CH343, select a module circuit for welding to meet the programming conditions.

Theoretically, it feels like both can be soldered, but the CH343 chip hasn't arrived yet. Now only CH340k has been verified, there is no problem!

For verification, I chose Essence’s ESP32-C3-32S and nodemcu-12F, which are automatically programmed.

However, Hezhou's ESP32-C3 has been having problems with automatic programming. I looked at his schematic diagram for a long time, but I still don't know what went wrong.

In theory, it's absolutely fine. Because it uses the same chip as the successfully verified ESP32-C3-32S of Essence, and the surrounding circuits are similar!

Will continue to update in the future! Stay tuned!

Physical display instructions

When drawing the board, I accidentally mistakenly changed the pin header to 2.00mm. You can manually change the pin header before installing the PCB.

If you don't change it, there will be no problem. Just like my actual picture, solder one end of the cable directly to the board.

Precautions

Subsequent updates

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