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)

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 11 V2.0.0
Parameter
Description
802.11n: HT20 MCS0 to MCS7
Antenna type
Onboard PCB antenna
4.2 TYWRD2S Output Power
Table 4-2 Power during constant transmission
Parameter
Minimum
Value
Typical
Value
Maximum
Value
Unit
Average RF output power,
802.11b CCK mode
1 Mbit/s
N/A
17
N/A
dBm
Average RF output power,
802.11g OFDM mode
54 Mbit/s
N/A
14
N/A
dBm
Average RF output power,
802.11n OFDM mode
MCS7
N/A
13
N/A
dBm
Frequency error
–20
N/A
20
ppm
4.3 TYWRD2S RX Sensitivity
Table 4-3 RX sensitivity
Parameter
Minimum
Value
Typical
Value
Maximum
Value
Unit
PER < 8%, 802.11b CCK
mode
1 Mbit/s
N/A
–90
N/A
dBm
PER < 10%, 802.11g OFDM
mode
54 Mbit/s
N/A
–73
N/A
dBm
PER < 10%, 802.11n OFDM
mode
MCS7
N/A
–70
N/A
dBm

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 12 V2.0.0
5 Antenna Information
5.1 Antenna Type
TYWRD2S uses an onboard PCB antenna.
5.2 Antenna Interference Reduction
To ensure optimal Wi-Fi performance when the Wi-Fi module uses an onboard PCB
antenna, it is recommended that the antenna be at least 15 mm away from other metal
parts.
To prevent adverse impact on the antenna radiation performance, avoid copper or traces
along the antenna area on the PCB.
Ensure that there are no substrate media above or below the antenna and that copper is
at a certain distance away from the antenna to maximize the antenna radiation
performance.

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 13 V2.0.0
5.3 Antenna Connector Specifications
TYWRD2S does not use an antenna connector.
6 Packaging Information and Production Instructions
6.1 Mechanical Dimensions
Figure 6-1 TYWRD2S mechanical dimensions
Figure 6-2 Side view

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 14 V2.0.0
6.2 Recommended PCB Encapsulation
Figure 6-3 TYWRD2S pins
Figure 6-4 PCB encapsulation diagram of TYWRD2S
6.3 Production Instructions
1. Use an SMT placement machine to mount components to the stamp hole module that
Tuya produces within 24 hours after the module is unpacked and the firmware is
burned. If not, vacuum pack the module again. Bake the module before mounting
components to the module.
(1) SMT placement equipment
i. Reflow soldering machine

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 15 V2.0.0
ii. Automated optical inspection (AOI) equipment
iii. Nozzle with a 6 mm to 8 mm diameter
(2) Baking equipment
i. Cabinet oven
ii. Anti-static heat-resistant trays
iii. Anti-static heat-resistant gloves
2. Storage conditions for a delivered module are as follows:
(1) The moisture-proof bag is placed in an environment where the temperature is
below 30°C and the relative humidity is lower than 70%.
(2) The shelf life of a dry-packaged product is six months from the date when the
product is packaged and sealed.
(3) The package contains a humidity indicator card (HIC).
Figure 6-5 HIC for TYWRD2S
3. Bake a module based on HIC status as follows when you unpack the module
package:
(1) If the 30%, 40%, and 50% circles are blue, bake the module for 2 consecutive
hours.
(2) If the 30% circle is pink, bake the module for 4 consecutive hours.
(3) If the 30% and 40% circles are pink, bake the module for 6 consecutive hours.
(4) If the 30%, 40%, and 50% circles are pink, bake the module for 12 consecutive
hours.
4. Baking settings:
(1) Baking temperature: 125±5°C

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 16 V2.0.0
(2) Alarm temperature: 130°C
(3) SMT placement ready temperature after natural cooling: < 36°C
(4) Number of drying times: 1
(5) Rebaking condition: The module is not soldered within 12 hours after baking.
5. Do not use SMT to process modules that have unpacked for over three months.
Electroless nickel immersion gold (ENIG) is used for the PCBs. If the solder pads are
exposed to the air for over three months, they will be oxidized severely and dry joints
or solder skips may occur. Tuya is not liable for such problems and consequences.
6. Before SMT placement, take electrostatic discharge (ESD) protective measures.
7. To reduce the reflow defect rate, draw 10% of the products for visual inspection and
AOI before first SMT placement to determine a proper oven temperature and
component placement method. Draw 5 to 10 modules every hour from subsequent
batches for visual inspection and AOI.
6.4 Recommended Oven Temperature Curve
Perform SMT placement based on the following reflow oven temperature curve. The
highest temperature is 245°C.
Based on the IPC/JEDEC standard, perform reflow soldering on a module at most twice.

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 17 V2.0.0
6.5 Storage Conditions
7 MOQ and Packing Information
MOQ and packing information
Product
Model
MOQ
Packing
Method
Number of
Modules in
Each Reel
Pack
Number of Reel
Packs in Each
Box

TYWRD2S Datasheet
Hangzhou Tuya Information Technology Co., Ltd. 18 V2.0.0
8 Appendix: Statement
Federal Communications Commission (FCC) Declaration of Conformity
FCC Caution:Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate this equipment.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
This device and its antenna(s) must not be co-located or operating in conjunction with any
other antenna or transmitter.
15.105 Information to the user.
(b) For a Class B digital device or peripheral, the instructions furnished the user shall
include the following or similar statement, placed in a prominent location in the text of the
manual:
Note: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance 20
cm between the radiator and your body.

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Hangzhou Tuya Information Technology Co., Ltd. 19 V2.0.0
Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment.
This transmitter must not be co-located or operating in conjunction with any other antenna
or transmitter.
The availability of some specific channels and/or operational frequency bands is country
dependent and firmware programmed at the factory to match the intended destination.
The firmware setting is not accessible by the end user.
The final end product must be labeled in a visible area with the following:
"Contains Transmitter Module 2ANDL-TYWRD2S"
This radio module must not be installed to co-locate and operating simultaneously with
other radios in host system, additional testing and equipment authorization may be
required to operating simultaneously with other radio.
Declaration of Conformity European notice
Hereby, Hangzhou Tuya Information Technology Co., Ltd. declares that this Wi-Fi module
product is in compliance with essential requirements and other relevant provisions of
Directive 2014/53/EC.A copy of the Declaration of conformity can be found at
https://www.tuya.com.
EN 300 328 V2.1.1
EN 301 489-1 V2.1.1; EN 301 489-17 V3.1.1
EN 62311:2008
EN 60950-1:2006+A11:2009+A1:2010+A12:2011+A2:2013