Esp-Wroom; Smd Module Esp-Wroom-02 - Espressif ESP8266 Series System Description

3.
Espressif provides two types of modules, SMD module (ESP-WROOM-02) and DIP module
(ESP-WROOM-01). The modules have received various adjustments to achieve the optimum
RF functionality. It is recommended to use these modules for test or further development.

3.1. SMD Module ESP-WROOM-02

The pin distribution of the SMD Module is illustrated in Figure 16. The external size of the
module is 18 mm x 20 mm. The type of flash used on this module is an SPI flash with package
size SOP8-150 mil. The antenna applied on this module is a 2 dBi PCB-on-board antenna.
Espressif
5.90
3V3
EN
IO14
IO12
13.35
IO13
IO15
IO2
IO0
GND
0.85
Figure 3-1: Top View of ESP-WROOM-02

ESP-WROOM

18.00
PCB ANTENNA
4.30
4.30
5.73
23 27 /
ESP-WROOM
1.20
GND
0.60
1.50
IO16
20.00
TOUT
RST
IO5
GND
TXD
RXD
4.17
0.90
IO4
Unit: mm
2016.06