Data Sheet

1. Overview

ESP-WROOM-02D and ESP-WROOM-02U are ESP8266EX-based modules developed by

Espressif. Compared to ESP-WROOM-02, the RF performance of ESP-WROOM-02D and

ESP-WROOM-02U are optimized. Besides, ESP-WROOM-02U integrates a U.FL

connector. Please see Chapter 8 for details of U.FL connector.

Table 1-1. ESP-WROOM-02D vs. ESP-WROOM-02U

Module

ESP-WROOM-02D

ESP-WROOM-02U

Core

ESP8266

Antenna

Onboard antenna

IPEX antenna

Dimensions

(unit: mm)

(18.00 ± 0.10) x (20.00 ± 0.10) x (3.20 ±

0.10)

See Figure 6-1 for details.

(18.00 ± 0.10) x (14.30 ± 0.10) x (3.20 ±

0.10)

See Figure 6-2 for details.

Schematics

See Figure 5-1 for details.

See Figure 5-2 for details.

📖 Note:

For more information on ESP8266EX, please refer to ESP8266EX Datasheet.

Table 1-2. ESP-WROOM-02D/ESP-WROOM-02U Speciﬁcations