WR3E Reset & Teardown (FCC ID 2ANDL-WR3E)

WR3E User Manual
Tuya Smart Wi-Fi Module 
1. Product Overview
WR3E is a low power consumption module with built-in Wi-Fi connectivity solution 
designed by Hangzhou Tuya Information Technology Co., Ltd..The Wi-Fi Module consists of a highly 
integrated wireless radio chip W302HBI40PI and some extra flashthathas been programed with 
Wi-Fi network protocol and plenty of software examples.WR3E include a ARM CM4F, WLAN 
MAC, 1T1R WLAN, maximum frequency reaches 125MHz, 256K SRAM, 1M byte flash and 
various peripheral resources. 
WR3E is a RTOS platform, embedded with all the Wi-Fi MAC and TCP/IP protocol function 
examples, users can customize their Wi-Fi product by using these software examples. 
1.1 Features 
 Integrated low power consumption 32-bit CPU, also known as application processor
 Basic frequency of the CPU can support 125 MHz
 Supply voltage range: 3V to 3.6V
 Peripherals:7 GPIO channels, 2 UART, 1 ADC
 Wi-Fi connectivity:
 802.11 B/G/N20/N40
Channel 1 to 11 @ 2.4GHz
 Support WPA/WPA2
+23.31dBm output power in 802.11g Mode
 Support SmartConfig function for both Android and IOS devices
 On-board PCB antenna
 Pass CE, FCC, SRRC certifications
 Operating temperature range: -20℃ to 85℃
1.2 Main ApplicationFields 
 Intelligent Building
 Intelligent home, Intelligent household applications
 Healthy devices
 Industrial wireless control
 Baby monitor
 Webcam
 Intelligent bus
WR3E User Manual
2. Dimensions and Footprint
2.1Dimensions 
WR3E has 2 columns of Pins (2*8).The distance between each Pin is 2 mm. 
Size of WR3E: 16 mm (W)×24 mm (L) ×3.3 mm (H) 
2.2 Pin Definition 
Table 1 shows the generalpin attributes of WR3E 
Table 1. The typical pin definitionof WR3E 
PIN
NO.
NAME TYPE DISCREPTION
1 NC / Dangling don't pick up, in order to compatible with other 
modules 
2 ADC AI ADC，Max5V 
3 CHIP_EN I/O 
4 GPIOA_29 I/O UART_Log_RXD GPIO 
5 GPIOA_14 I/O GPIOA_14，hardware PWM 
6 GPIOA_15 I/O GPIOA_15，hardware PWM 
7 GPIOA_22 I/O GPIOA_22 
8 VCC P （3.3V） 
9 GND P 
10 GPIOA_0 I/O GPIOA_0，HardwarePWM 
11 GPIOA_30 I/O UART_Log_TXD GPIO 
12 GPIOA_19 I/O GPIOA_19 
13 GPIOA_5 I/O GPIOA_5，hardware PWM 
14 GPIOA_12 I/O GPIOA_12，hardware PWM 
15 RXD I/O UART0_RXD 
16 TXD I/O UART0_TXD 
Note: S: Power supply pins; I/O: Digital input or output pins; AI: Analog input. 

WR3E User Manual
3. Electrical Characteristics
3.1 Absolute Maximum Ratings 
Table 3.1. Absolute Maximum Ratings 
PARAMETERS DESCRIPTION MIN MAX UNIT
Ts Storagetemperature ‐40 105 ℃
VCC Supplyvoltage ‐0.3 3.6 V
Staticelectricityvoltage
(humanmodel)
TAMB‐25℃ ‐ 2 KV
Staticelectricityvoltage
(machinemodel)
TAMB‐25℃ ‐ 0.5 KV
3.2 Electrical Conditions 
Table 3.2. Electrical Conditions 
PARAMETERS DESCRIPTION MIN TYPICAL MAX UNIT
Ta Workingtemperature ‐20 ‐ 85 ℃
VCC Workingvoltage 3 3.3 3.6 V
VIL IOlowlevelinput ‐0.3 ‐ VDD*0 .2 5 V
VIH IOhighlevelinput VDD*0.7 5 ‐ VDD V
VOL IOlowleveloutput ‐ ‐ VDD*0. 1 V
VoH IOhighleveloutput VDD*0.8 ‐ V V
Imax IOdrivecurrent ‐ ‐ 16 mA
Cpad Inputcapacitor ‐ 2 ‐ pF
WR3E U...