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There's something very nice about ESP32 Wroom modules: you can use fixtures to quickly debug things, remove a module, solder it and viola, you have something working. Or a bad board. Mostly those options.
And I've been using a fixture by DIYMall for some time at this point. From my perspective, its main feature is the support for ESP32-S3-WROOM-1U and ESP32-S3-WROOM-1 (datasheet).
It is very helpful as a fixture. It is not helpful whatsoever in terms of having a proper documentation. If you open the DIYMalls site, it shows 403 and doesn't give you anything.
So, the fixture is easy to buy on AliExpress, for example, here, it works without hassle, and it will also require you trace all pins unless you have a reference.
Thus, I've traced everything I found so you don't have to.
| ESP32-S3-Wroom contact pad | DS REF | Arduino pin | Board pin |
|---|---|---|---|
| 39 | IO1 | 1 | D36 |
| 38 | IO2 | 2 | D35 |
| 4 | IO4 | 4 | D1 |
| 5 | IO5 | 5 | D2 |
| 6 | IO6 | 6 | D3 |
| 7 | IO7 | 7 | D4 |
| 12 | IO8 | 8 | D9 |
| 17 | IO9 | 9 | D14 |
| 18 | IO10 | 10 | D15 |
| 19 | IO11 | 11 | D16 |
| 20 | IO12 | 12 | D17 |
| 21 | IO13 | 13 | D18 |
| 22 | IO14 | 14 | D19 |
| 8 | IO15 | 15 | D5 |
| 9 | IO16 | 16 | D6 |
| 10 | IO17 | 17 | D7 |
| 11 | IO18 | 18 | D8 |
| 23 | IO21 | 21 | D20 |
| 31 | IO38 | 38 | D28 |
| 32 | IO39 | 39 | D29 |
| 33 | IO40 | 40 | D30 |
| 34 | IO41 | 41 | D31 |
| 35 | IO42 | 42 | D32 |
| 24 | IO47 | 47 | D21 |
| 25 | IO48 | 48 | D22 |
| 36 | RXD0 | 36 | D33 |
| 37 | TXD0 | 37 | D34 |
If you'd like to make corrections or are unhappy with how I wrote this tiny article, ping me in Telegram.
This topic possibly deserves to be a more widely shown form of a doc. Then again, IDK if anyone uses S3 that much around.
