Minimum ESP32 circuit required for runtime

[WoolySheep]

Hi all,

I normally use an 'ESP32 Dev Kit C' for my projects. This time I want to create a PCB and solder an ESP32-Wroom-32D chip direct to it. This will make my project much smaller.

So, I have bought 5 of the below:

ESP32.jpg (48.28 KiB) Viewed 1555 times

Then, I made the below circuit as I think it is the most basic that I need to be able to upload code.

ESP32-Minimum.jpg (476.58 KiB) Viewed 1555 times

The USB TTL Interface has a built-in AMS1117 3.3v regulator in it.

Can people please tell me if the above circuit will work.

Many thanks
Alan

[ESP_Sprite]

You need at least a power-on reset RC network on your EN pin. Given that you have an 10K pullup already, simply add an 1uF between ground and EN and that should be fixed.

[WoolySheep]

Hi @ESP_Sprite, thank you for your help. So, how is the below now?

ESP32(1).jpg (421.18 KiB) Viewed 1478 times

Many thanks
Alan