Hangzhou Tuya Information Technology WR3L User Manual
WR3LV1.0.0 User Manual
Version1.0.0
1. Product Overview
WR3L is a low power-consuming built-in Wi-Fi module developed by Hangzhou Tuya
Information Technology Co., Ltd. It consists of a highly integrated radio frequency chip
(RTL8710BX) and an external flash chip, with a built-in Wi-Fi network protocol stack and robust
library functions. WR3L also contains a low power-consuming ARM CM4F, a WLAN MAC, a
1T1R WLAN, and the maximum basic frequency of 125 MHz, and is embedded with a 256 KB
SRAM, a 2 MB flash, and robust peripheral resources.
WR3L is an RTOS platform that integrates all the function libraries of the Wi-Fi MAC and
TCP/IP protocols. You can develop built-in Wi-Fi products as required.
1.1 Features
Built-in low power-consuming 32-bit CPU functioning as an application processor
Basic frequency: 125 MHz
Working voltage: 3 V to 3.6 V
Peripherals: seven GPIOs, two UARTs, and one ADC
Wi-Fi connectivity
802.11 B/G/N20/N40
Channels 1-11@2.4GHz
Supports WPA/WPA2 safe modes
SmartConfig mode (for Android and iOS devices)
Passing the CE, FCC, and SRRC certification
Working temperature: –20°C to +105°C
1.2 Major Application Fields
Intelligent building
Intelligent home and household appliances
Healthcare
Industrial wireless control
Baby monitors
Network camera
Intelligent bus
WR3LV1.0.0 User Manual
Version1.0.0
2. Module Interfaces
2.1 Dimensions and Pin Layout
WR3L provides two rows of pins (2 x 8) with the distance of 2 mm between every two pins.
WR3L dimensions: 16 mm (W) x 24 mm (L) x 3.3 mm (H) (see figure 2.1)
2.2 Pin definition
Table 2.1 describes the common pins.
Table 2.1，WR3L pins description
No. Symbol I/OType Function
1 NC / Disconnected to be compatible with other modules
2 GPIOA_22 I/O GPIOA_22
3 CHIP_EN I/O External enablement reset pin (valid at low level)
4 GPIOA_19 I/O GPIOA_19
5 GPIOA_14 I/O GPIOA_14, used for hardware PWM
6 GPIOA_15 I/O GPIOA_15, used for hardware PWM
GPIOA_0, which cannot be pulled up during
7 GPIOA_0 I/O
power-on and can be configured after power-on. It
is used for hardware PWM.
Version1.0.0
8
VD33 P Module power supply pin (3.3 V)
9
GND P Power supply reference ground pin
10
ADC
AI
ADC port, with the maximum input voltage of 5 V
11
GPIOA_29
I/O
UART_Log_RXD (used for printing the internal
information of the module)
12
GPIOA_30
I/O
UART_Log_TXD (used for printing the internal
information of the module)
13
GPIOA_5
I/O
GPIOA_5, used for hardware PWM
14
GPIOA_12
I/O
GPIOA_12, used for hardware PWM
15
RXD
I/O
UART0_RXD (user’s serial port)
16
TXD
I/O
UART0_TXD (user’s serial port)
Note: P indicates power-supply pins, I/O indicates input/output pins, and AI indicates
Parameters
Description
Minimu
m value
Maximu
m value
Unit
Ts
Storage
temperature
–40
125
°C
VDD
Power-supply
voltage
–0.3
3.6
V
Static electricity voltage
(human model)
TAMB –
25°C
- 2 kV
Static electricity voltage
(machine model)
TAMB –
25°C
-
0.5
kV
Paramet
ers
Description
Min
Typ
Max
Unit
Ta
Working
temperature
–20- 105
°C
VDD
Working voltage
3.0
3.6
V
VIL
I/O low-level input
–0.3
-
VDD x 0.25
V
analog input pins.
3. Electrical Parameters
3.1 Absolute electrical parameters
Table 3.1,Absolute Parameters
WR3LV1.0.0 User Manual
3.2 Electrical Conditions
Table 3.2 Normal electrical conditions
3.3
Version1.0.0
VIH
I/O high-level input
VDD x 0.75
-
3.6
V
VOL
I/O low-level output
-
-
VDD x 0.1
V
VOH
I/O high-level
output
VDD x 0.8
-
VDD
V
Imax
I/O drive current
- - 16
mA
Cpad
Input pin
capacitance
- 2 -
pF
3.3 Wi-Fi TX power consumption
Symbol
Mode
Power
Typ
Unit
IRF
11b 11 Mbit/s
287
mA
Table 3.3 TX power during constant emission
WR3LV1.0.0 User Manual
20.63 dBm
IRF 11g 54 Mbit/s
IRF 11n BW20 MCS7
IRF
3.4 Wi-Fi RX
11n BW40 MCS7
power consumption
Table 3.4 RX
Symbol Mode Typ Unit
IRF CPU sleep 90 mA
IRF CPU active 120 mA
22.2 dBm
21.27 dBm
20.82 dBm
power during constant receiving
255 mA
244
230
mA
mA
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