WR2E Reset & Teardown (FCC ID 2ANDL-WR2E)

WR2E User Manual
TuyaSmartWi-Fi Module 
1. Product Overview
WR2E 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 
W302 HB140P1 and some extra flash that has been programed with Wi-Fi network 
protocol and plenty of software examples.WR2E include a ARM CM4F, WLAN MAC, 1T1R WLAN, 
maximum frequency reaches 125MHz, 256K SRAM, 1M byte flash and various 
peripheral resources. 
WR2E 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. 
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
 Support SmartConfig function for both Android and IOS devices
 On-board PCB antenna
 Pass CE, FCC, SRRC certifications
 Operating temperature range: -20℃ to 85℃
Main ApplicationFields 
 Intelligent Building
 Intelligent home, Intelligent household applications
 Healthy devices
 Industrial wireless control
 Baby monitor
 Webcam
 Intelligent bus
WR2E User Manual
2. Dimensions and Footprint
2.1Dimensions 
WR2E has 2 columns of Pins (2*9).The distance between each Pin is 2 mm. 
Size of WR2E: 15 mm (W)×18 mm (L) ×3.3 mm (H) 
2.2 Pin Definition 
Table 1 shows the general pin attributes of WR2E 
Table 1. The typical pin definition of WR2E 
PIN
NO.
NAME TYP
DISCREPTION
1 VD33 P 3.3V 
2 GPIOA_1 
2 
I/O GPIOA_12，general GPIO，hardware PWM 
3 GND P Power supply
4 GPIOA_1 
9 
I/O GPIOA_19，general GPIO 
5 GPIOA_1 
8 
I/O UART0_RXD 
6 GPIOA_5 I/O GPIOA_5，general GPIO，hardware PWM 
7 GPIOA_2 
3 
I/O UART0_TXD 
8 ADC AI ADC port，Max5V 
9 GPIOA_1 
4 
I/O GPIOA_14 ，General GPIO，hardware PWM 
10 CHIP_EN I/O External can make reset pin (effective) low level 
11 GPIOA_1 
5 
I/O GPIOA_15，General GPIO，hardware PWM 
Note: P: Power supply pins; I/O: Digital input or output pins; AI: Analog input. 
WR2E User Manual
3. Electrical Characteristics
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
Electrical Conditions 
Table 3.2. Electrical Conditions 
PARAMETERS DESCRIPTION MIN TYPICAL MAX UNIT
Ta Workingtemperature ‐20 ‐ 85 ℃ 
VCC Workingvoltage 3 ‐ 3.6 V
VIL IOlowlevelinput ‐0.3 ‐ VDD*0.25 V
VIH IOhighlevelinput VDD*0.75 ‐ VDD V
VOL IOlowleveloutput ‐ ‐ VDD*0.1 V
VoH IOhighleveloutput VDD*0.8‐ V V
Imax IOdrivecurrent ‐ ‐ 16 mA
Cpad Inputcapacitor ‐ 2 ‐ pF
WR2E User Manual
Wi-Fi Receiving CurrentConsumptions 
Table 3.3. Wi-Fi RX currentconsumption 
PARAMETERS MODE T...