ESP WROOM 32 Breakout

9 months ago

Open source license: Public Domain

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Description

ESP WROOM 32 Breakout

A breakout board for Espressif's ESP32 module ESP-WROOM-32. The ESP32 is a powerful and low-cost Wifi/Bluetooth chip that enables great Internet-Of-Things applications. Studio Sophisti is using this chip in several projects, including a work-in-progress redesign of Ping

The ESP-WROOM-32 can be purchased directly from Espressif or from a distributor like Adafruit: https://www.adafruit.com/product/3320

The board contains reverse-voltage protections, 2 buttons (1 for reset and 1 for activating programming mode), and a diode on the RX line so the IC is 5V serial port compatible. Power it from a 3.0-3.3V power source. The design has been tested and works.

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ESP WROOM 32 Breakout

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ESP WROOM 32 Breakout

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BOM

ID Name Designator Footprint Quantity
1 RST SW2 SW2-4.0-6.0X3.0X2.5MM 1
2 10u C4 C0603 1
3 10k R2,R1 R0603 2
4 PROG SW1 SW2-4.0-6.0X3.0X2.5MM 1
5 ESP-WROOM-32 U3 ESP-WROOM-32 1
6 DIODE'0805' D1 SOD-323 1
7 M14 JP1,JP2 1X14 2
8 M06SILK_FEMALE_PTH JP3 1X06 1
9 2N7002 Q1 SOT23 1

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All comments 5

jaymac

You may need to ensure a pull-up resistor is also on the RX pin input for the D1 blocking method to work with a 5v system.  See https://next-hack.com/index.php/2017/09/15/how-to-interface-a-5v-output-to-a-3-3v-input/

2020-12-14 15:59:30
Reply

nicosandller

Good work! I can't figure out how the diode on the RX line helps. Can you explain briefly?  Thanks!

2020-10-15 14:01:47
Reply

Looka

@oleg.tchurilo Thank!

2020-09-08 07:25:13
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oleg.tchurilo

@Looka 1N4148

2020-09-07 18:48:28
Reply

Looka

Thanks for your work!
What is the diode D1, model and nominal?

2020-09-07 08:48:07
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