TUYA WB2S Manuel utilisateur
WB2S Datasheet
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1 Product Overview
WB2S is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a
highly integrated RF chip (BK7231D) and several peripheral components, with an
embedded Wi-Fi network protocol stack and robust library functions. WB2S also
contains a low-power Arm Cortex-M4 microcontroller unit (MCU), 1T1R WLAN module,
256 KB static random-access memory (SRAM), 2 MB flash memory, and extensive
peripherals.
WB2S 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 32-bit CPU, which can also function as an application
processor
Clock rate: 120 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/n20/n40
Channels 1 to 14 at 2.4 GHz
WPA and WPA2 security modes
Up to +16 dBm output power in 802.11b mode
EZ net pairing mode for Android and iOS devices
Onboard PCB antenna
Tuya WB2S Wi-Fi Module
Version: 1.0.0 Date: 2019-11-23
No.: 0000000001
Product
Manual
Global Intelligent Platform
WB2S Datasheet
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Certified by CE and FCC
Working temperature: –20°C to +85°C
BT
Support Bluetooth (V4.0)
Maximum output power + 7dBm EIRP
Onboard PCB antenna with a gain of -1 dBi
1.2 Application Scenarios
Intelligent building
Smart household and home appliances
Healthcare
Industrial wireless control
Baby monitor
Network camera
Intelligent bus
Change History
No.
Date Change Description Version After Change
1 2019-11-23 This is the first release. 1.0.0
WB2S Datasheet
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Contents
1 Product Overview ............................................................................................................. 1
1.1 Features .................................................................................................................. 1
1.2 Application Scenarios ............................................................................................. 2
2 Module Interfaces ............................................................................................................. 6
2.1 Dimensions and Footprint ...................................................................................... 6
2.2 Interface Pin Definition ........................................................................................... 6
3 Electrical Parameters ........................................................................................................ 7
3.1 Absolute Electrical Parameters .............................................................................. 7
3.2 Working Conditions ................................................................................................ 8
3.3 TX Current Consumption ........................................................................................ 9
3.4 RX Current Consumption ....................................................................................... 9
3.5 Working Current ..................................................................................................... 9
4 RF Features .................................................................................................................... 10
4.1 Basic RF Features ................................................................................................ 10
4.2 WB2S TX Power ................................................................................................... 11
4.3 WB2S 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 Layout ................................................................................. 14
6.3 Production Instructions ......................................................................................... 14
6.4 Recommended Oven Temperature Curve ........................................................... 16
6.5 Storage Conditions ............................................................................................... 17
WB2S Datasheet
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7. Reference Circuit ........................................................................................................... 18
7.1 Schematic Diagram .............................................................................................. 18
8 MOQ and Packing Information ....................................................................................... 19
WB2S Datasheet
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Figures
Figure 2-1 WB2S front and rear views ................................................................................ 6
Figure 5-1 Antenna clearance part .................................................................................... 12
Figure 6-1 WB2S mechanical dimensions ........................................................................ 13
Figure 6-2 WB2S pins ........................................................................................................ 14
Figure 6-3 Top and bottom views of the PCB to which WB2S applies .............................. 14
Figure 6-4 HIC for WB2S ................................................................................................... 15
Figure 6-5 Oven temperature curve .................................................................................. 16
Figure 7-1 WB2S schematic diagram ................................................................................ 18
Tables
Table 2-1 WB2S interface pins ............................................................................................ 6
Table 3-1 Absolute electrical parameters ............................................................................ 7
Table 3-2 Normal working conditions ................................................................................... 8
Table 3-3 Current consumption during constant transmission ............................................ 9
Table 3-4 Current consumption during constant receiving .................................................. 9
Table 3-5 WB2S working current ......................................................................................... 9
Table 4-1 Basic RF features .............................................................................................. 10
Table 4-2 Power during constant transmission.................................................................. 11
Table 4-3 RX sensitivity ..................................................................................................... 11
Table 8-1 Packing information ........................................................................................... 19
WB2S Datasheet
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2 Module Interfaces
2.1 Dimensions and Footprint
WB2S has two rows of pins with a 2 mm pin spacing.
The WB2S dimensions (H x W x D) are 3.3 mm x 15 mm x 18 mm. Figure 2-1 shows the
WB2S front and rear views.
Figure 2-1 WB2S front and rear views
Note:
The default dimensional tolerance is ±0.35 mm, and the tolerance for some
measurements is ±0.1 mm. The PCB thickness is 1.0±0.1 mm.
2.2 Interface Pin Definition
Table 2-1 WB2S interface pins
Pin No.
Symbol
I/O Type Function
1 VBAT P Power supply pin (3.3 V), which is connected to
the VBAT pin on the internal IC
2 PWM2 I/O Common GPIO, which is connected to the P8 pin
on the internal IC
3 GND P Power supply reference ground pin
4 PWM1 I/O Common GPIO, which is connected to the P7 pin
on the internal IC
WB2S Datasheet
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Pin No.
Symbol
I/O Type Function
5 RX I/O
UART1_RXD, which is used as a user-side serial
interface pin and is connected to the P10 pin on
the internal IC
6 PWM0 I/O Common GPIO, which is connected to the P6 pin
on the internal IC
7 TX I/O
UART1_TXD, which is used as a user-side serial
interface pin and is connected to the P11 pin on
the internal IC
8 AD AI ADC pin, which is connected to the P23 pin on
the internal IC
9 PWM4 I/O Common GPIO, which is connected to the P24
pin on the internal IC
10 CEN I/O
External enabled reset pin, which is active at a
low level and is connected to the CEN pin on the
internal IC
11 PWM5 I/O Common GPIO, which is connected to the P26
pin on the internal IC
Note:
P indicates a power supply pin, I/O indicates an input/output pin, and AI indicates an
analog input pin.
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 –0.3 3.6 V
WB2S Datasheet
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Parameter Description Minimum
Value
Maximum
Value
Unit
Static electricity voltage
(human body model) Tamb = 25°C N/A 2 kV
Static electricity voltage
(machine model) Tamb = 25°C N/A 0.5 kV
3.2 Working Conditions
Table 3-2 Normal working conditions
Parameter Description Minimum
Value
Typical
Value
Maximum
Value
Unit
Ta Working
temperature –20 N/A 85 °C
VCC
Power
supply
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
Cpad Input pin
capacitance N/A 2 N/A pF
WB2S Datasheet
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3.3 TX Current Consumption
Table 3-3 Current consumption during constant transmission
Symbol Mode Power Typical Value Unit
IRF 802.11b
11 Mbit/s
16 dBm
222 mA
IRF 15 dBm
215 mA
IRF 802.11g
54 Mbit/s
15 dBm
210 mA
IRF 14 dBm
195 mA
IRF 802.11n BW20
MCS7
13 dBm
200 mA
IRF 12 dBm
185 mA
IRF 802.11n BW40
MCS7
12 dBm
190 mA
IRF 11 dBm
190 mA
3.4 RX Current Consumption
Table 3-4 Current consumption during constant receiving
Symbol Mode Typical Value
Unit
IRF CPU sleep 50 mA
IRF CPU active 95 mA
3.5 Working Current
Table 3-5 WB2S working current
Working
Mode
Working Status (Ta = 25°C) Average
Value
Maximum
Value
Unit
EZ The module is in EZ mode, and
the Wi-Fi indicator blinks quickly. 100 170 mA
AP The module is in AP mode, and 50 125 mA
WB2S Datasheet
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Working
Mode
Working Status (Ta = 25°C) Average
Value
Maximum
Value
Unit
the Wi-Fi indicator blinks slowly.
Connected
The module is connected to the
network, and the Wi-Fi indicator is
steady on.
40 180 mA
Disconnected
The module is disconnected from
the network, and the Wi-Fi
indicator is steady off.
60 110 mA
4 RF Features
4.1 Basic RF Features
Table 4-1 Basic RF features
Parameter Description
Frequency band BT:2.400 GHz to 2.4835 GHz
WIFI:2.412 GHz to 2.484 GHz
Wi-Fi standard IEEE 802.11b/g/n (channels 1 to 14，Ch1-11 for
US/CA,Ch1-13 for EU/CN)
BT standard BT 4.0
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)
802.11n: HT20 MCS0 to MCS7
802.11n: HT40 MCS0 to MCS7
Antenna type PCB antenna with a gain of -1.0 dBi
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