Small ESP32-S2 dev board for handsoldering

[Miraculix]

I see only one thread with ESP32-S2 in the Showcase forum, so here's another one.

This is a small breadboard friendly dev board I designed which is compatible with ESP32-S2 WROVER and WROOM. Many pins are not accessible to make it smaller. It includes a MCP1700 or MCP1702 voltage regulator which has a very low quiescent current, so the board only draws 26uA during deep sleep.

For reverse polarity protection it uses a cheap P-Channel MOSFET instead of a diode.

Capacitors and resistor use a 0805 footprint to make it easy to handsolder.

Schematic and PCB design can be accessed here: https://oshwlab.com/Miraculix200/s2-tiny

[lowtolerance]

Very nice! I’m working on a couple of esp32-s2-based projects and its astounding how easy (and CHEAP!!) it is to make a custom pcb for these modules. I’m using the new MINI modules for one, and the PCB is only as wide as the module (<17mm), and the BOM for it is less than $2 USD, including the module

[chegewara]

Very nice! I’m working on a couple of esp32-s2-based projects and its astounding how easy (and CHEAP!!) it is to make a custom pcb for these modules. I’m using the new MINI modules for one, and the PCB is only as wide as the module (<17mm), and the BOM for it is less than $2 USD, including the module

Only about half pins exposed, and missing pins 19 and 20, so no possible to use native USB.

[lowtolerance]

Very nice! I’m working on a couple of esp32-s2-based projects and its astounding how easy (and CHEAP!!) it is to make a custom pcb for these modules. I’m using the new MINI modules for one, and the PCB is only as wide as the module (<17mm), and the BOM for it is less than $2 USD, including the module

Only about half pins exposed, and missing pins 19 and 20, so no possible to use native USB.

The ESP32-S2-MINI modules definitely do expose pins 19 and 20

[abdel1254]

hello,

I would like to ask questions. i built the circuit board as you showed, i used the same components. but the problem is when the ESP32 S2 tries to connect to the WLAN does not work. I also use a 18650 battery.
Have you tried to connect the board to WiFi? did that work for you?

Thanks

[chegewara]

hello,

I would like to ask questions. i built the circuit board as you showed, i used the same components. but the problem is when the ESP32 S2 tries to connect to the WLAN does not work. I also use a 18650 battery.
Have you tried to connect the board to WiFi? did that work for you?

Thanks

Can you check power source, especially voltage on 3.3V pin. Wifi is not tolerant and not accepting over-voltage.
I did once it by accident and connected 5V to 3.3V. esp32 did work normally except that i had issue with connecting to wifi.