TUYA TYWRD2S User manual

1. Product Overview
TYWRD2S is a low-power embedded Wi-Fi module that Tuya has developed. It consists
of a highly integrated RF chip (RDA5981B) and several peripheral components, with an
embedded Wi-Fi network protocol stack and robust library functions. TYWRD2S is
embedded with a low-power Arm Cortex-M4 MCU, 2 MB flash memory, and 448 KB static
random-access memory (SRAM), and has extensive peripherals.
TYWRD2S is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and
TCP/IP protocols. You can develop embedded Wi-Fi products as required.
1.1 Features
Embedded low-power CPU, which can also function as an application processor
⚫Dominant frequency: up to 160 MHz
Working voltage: 3.0 V to 3.6 V
Peripherals: five GPIOs, one universal asynchronous receiver/transmitter (UART),
and one analog-to-digital converter (ADC)
Wi-Fi connectivity
⚫802.11b/g/n HT20
⚫2.4GHz WiFi
⚫WPA, WPA2, WEP, and TKIP security modes
⚫Up to +17 dBm output power in 802.11b mode
⚫STA, AP, and STA+AP working modes
⚫Smart and AP network configuration modes forAndroid and iOS devices
⚫Onboard PCB antenna with antenna gain of 1.0dBi.
Tuya TYWRD2S Wi-Fi Module
Version: 2.0.0
Date: 2019-09-04
No.: 0000000001
Product
Manual
Global Intelligent Platform

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 2 V2.0.0
⚫Working temperature: –20°C to +85°C
1.2 Applications
Intelligent building
Smart household and home appliances
Smart socket and light
Industrial wireless control
Baby monitor
Network camera
Intelligent bus

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 3 V2.0.0
Change History
No.
Date
Change Description
Version After Change
1
2019-07-26
This is the first release.
2.0.0

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 4 V2.0.0
Contents
1. Product Overview ............................................................................................................1
1.1 Features..................................................................................................................1
1.2 Applications ............................................................................................................2
2 Module Interfaces.............................................................................................................6
2.1 Dimensions and Footprint ......................................................................................6
2.2 Interface Pin Definition...........................................................................................6
2.3 Test Pin Definition...................................................................................................8
3 Electrical Parameters........................................................................................................8
3.1 Absolute Electrical Parameters..............................................................................8
3.2 Electrical Conditions...............................................................................................9
3.3 TYWRD2S RX Power Consumption....................................................................10
3.4 Working Current ...................................................................................................10
4 RF Features....................................................................................................................10
4.1 Basic RF Features................................................................................................10
4.2 TYWRD2S Output Power.....................................................................................11
4.3 TYWRD2S RX Sensitivity.....................................................................................11
5 Antenna Information........................................................................................................12
5.1 Antenna Type........................................................................................................12
5.2 Antenna Interference Reduction...........................................................................12
5.3 Antenna Connector Specifications.......................................................................13
6 Packaging Information and Production Instructions.......................................................13
6.1 Mechanical Dimensions .......................................................................................13
6.2 Recommended PCB Encapsulation.....................................................................14
6.3 Production Instructions.........................................................................................14
6.4 Recommended Oven Temperature Curve ...........................................................16

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 5 V2.0.0
6.5 Storage Conditions...............................................................................................17
7 MOQ and Packing Information.......................................................................................17
8 Appendix: Statement.......................................................................................................18
Figures
Figure 2-1 TYWRD2S front and rear views.........................................................................6
Figure 6-1 TYWRD2S mechanical dimensions.................................................................13
Figure 6-2 Side view..........................................................................................................13
Figure 6-3 TYWRD2S pins................................................................................................14
Figure 6-4 PCB encapsulation diagram of TYWRD2S......................................................14
Figure 6-5 HIC for TYWRD2S ...........................................................................................15
Tables
Table 2-1 TYWRD2S interface pins.....................................................................................6
Table 2-2 TYWRD2S test pins.............................................................................................8
Table 3-1 Absolute electrical parameters ............................................................................8
Table 3-2 Normal electrical conditions.................................................................................9
Table 3-4 Power consumption during constant receiving..................................................10
Table 3-5 TYWRD2S working current................................................................................10
Table 4-1 Basic RF features ..............................................................................................10
Table 4-2 Power during constant transmission .................................................................11
Table 4-3 RX sensitivity .....................................................................................................11

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 6 V2.0.0
2 Module Interfaces
2.1 Dimensions and Footprint
TYWRD2S has two rows of pins with a 2 mm pin spacing.
The TYWRD2S dimensions (H x W x D) are 3.5±0.15 mm x 15±0.35 mm x 17.97±0.35
mm.
Figure 2-1 shows TYWRD2S front and rear views.
Figure 2-1 TYWRD2S front and rear views
2.2 Interface Pin Definition
Table 2-1 TYWRD2S interface pins
Pin No.
Symbol
I/O Type
Function
1
VCC
P
Power supply pin (3.3 V)
2
22
I/O
GPIO_22, a standard PWM pin, which is
connected to GPIO22 (pin 34) on the IC
3
GND
P
Power supply reference ground pin
4
23
I/O
GPIO_23, a standard PWM pin, which is
connected to GPIO23 (pin 33) on the IC

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 7 V2.0.0
Pin No.
Symbol
I/O Type
Function
5
RX
I/O
UART_RX, which is connected to GPIO27
(pin 16) on the IC (See the following Note
3.)
6
25
I/O
GPIO_25, a standard PWM pin, which is
connected to GPIO25 (pin 31) on the IC
7
TX
Output
UART_TX, which is connected to GPIO26
(pin 24) on the IC (See the following Note
3.)
8
ADC
AI
ADC pin (See the following Note 2.)
9
IO24
I/O
GPIO_24, a standard PWM pin, which is
connected to GPIO24 (pin 32) on the IC
10
RST
I/O
Hardware reset pin (active at a low level)
11
IO3
I/O
GPIO_3, a standard PWM pin, which is
connected to GPIO3 (pin 23) on the IC
Note:
1. Pindicates power supply pins, I/O indicates input/output pins, and AI indicates analog
input pins.
RST is only a hardware reset pin and cannot clear the Wi-Fi network configuration.
2. This pin can only function as anADC input and not a common I/O. If this pin is not
used, it must be disconnected.
When this pin is used as theADC input, the input voltage range is 0 V to 2.0 V.
3. The UART pins are user-side serial interfaces.

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 8 V2.0.0
2.3 Test Pin Definition
Table 2-2 TYWRD2S test pins
Pin No.
Symbol
I/O Type
Function
N/A
N/A
Used for the module production test
N/A
IO2
Output
UART2_TXD, used to display the module
internal information, and corresponding to
GPIO2 (pin 22) on the IC
N/A
IO8
I/O
GPIO_8, corresponding to GPIO8 (pin 13) on
the IC
N/A
IO0
I/O
GPIO_0, corresponding to GPIO0 (pin 36) on
the IC
Note:
Test pins cannot be used.
3 Electrical Parameters
3.1 Absolute Electrical Parameters
Table 3-1 Absolute electrical parameters
Parameter
Description
Minimum
Value
Maximum
Value
Unit
Ts
Storage temperature
–20
85
°C
VCC
Power supply voltage
3.0
3.6
V
Static electricity
voltage (human
body model)
Tamb = 25°C
N/A
2
kV

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 9 V2.0.0
Static electricity
voltage (machine
model)
Tamb = 25°C
N/A
0.5
kV
3.2 Electrical Conditions
Table 3-2 Normal electrical conditions
Parameter
Description
Minimum
Value
Typical
Value
Maximum
Value
Unit
Ta
Working
temperature
–20
N/A
85
°C
VCC
Working voltage
3.0
3.3
3.6
V
VIL
I/O low-level
input
–0.3
N/A
VCC x
0.25
V
VIH
I/O high-level
input
VCC x
0.75
N/A
VCC
V
VOL
I/O low-level
output
N/A
N/A
VCC x
0.1
V
VOH
I/O high-level
output
VCC x 0.8
N/A
VCC
V
Imax
I/O drive current
N/A
N/A
12
mA

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 10 V2.0.0
3.3 TYWRD2S RX Power Consumption
Table 3-4 Power consumption during constant receiving
Symbol
Mode
Rate
Typical Value
Unit
IRF
802.11b
11 Mbit/s
80
mA
IRF
802.11g
54 Mbit/s
80
mA
IRF
802.11n
MCS7
80
mA
3.4 Working Current
Table 3-5 TYWRD2S working current
Working
Mode
Working Status (Ta = 25°C)
Average
Value
Unit
EZ
The module is in EZ mode.
70
mA
AP
The module is in AP mode.
80
mA
Connected
The module is connected to the network.
70
mA
4 RF Features
4.1 Basic RF Features
Table 4-1 Basic RF features
Parameter
Description
Frequency band
2.4GHz
Wi-Fi standard
IEEE 802.11b/g/n20
Data transmission rate
802.11b: 1, 2, 5.5, or 11 (Mbit/s)
802.11g: 6, 9, 12, 18, 24, 36, 48, or 54 (Mbit/s)