Hardware Development; Esp-Wroom-32 Module; Overview - Espressif Systems ESP32 Series Manual

4. Hardware Development

4.1 ESP-WROOM-32 Module

4.1.1 Overview

Espressif provides users with an SMD module, the ESP-WROOM-32. This module has been adjusted, in order to
achieve the optimum RF performance.
The size of the module is 18 mm x 25.5 mm. The flash used is an SOP8-208 mil one. The on-board PCB antenna
has a gain of 2 dBi. Figure
Espressif Systems
Figure 16: ESP-WROOM-32 Module
17 shows the dimensions and pin layout of this module.
6.00
Keepout Zone
1.50
1 GND
1.27
2 3V3
EN
3
SENSOR_VP
4
5 SENSOR_VN
IO34
6
6.30
IO35
7
IO32
8
IO33
9
10 IO25
IO26
11
12 8.65
IO27
IO14
13
IO12
0.90 14
3.30
Figure 17: ESP-WROOM-32 Pin Layout
18.00
GND 38
IO23 37
IO22 36
4.00
TXD0 35
25.50
RXD0 34
IO21 33
1:GND
4.00 NC 32
IO19 31
IO18 30
IO5 29
IO17 28
IO16 27
IO4 26
IO0 25
3.30
1.27
23 ESP32 Hardware Design Guideline V1.0
4 HARDWARE DEVELOPMENT
Unit: mm