JWBR2S-3.3V Module Datasheet

Product Overview

Developed by Tuya, JWBR2S-3.3V is a WiFi module that is suitable for serial communication of the 3.3 V TTL level. It consists of dual modules: WiFi module+Bluetooth WBR1 module, and a level conversion circuit. It’s further embedded with the Wi-Fi/BT network protocol stack and serial communication protocol
JWBR2S-3.3V is an RTOS platform. On the basis of the connection manner of serial communication, you can develop embedded products as required.

Features

• Embedded low-power KM4-MCU, which can also function as an application processor
  • The maximum clock rate: 100 MHz
• Working voltage: 3.3 V
• Peripherals: 1 universal asynchronous receiver/transmitter (UART)
• WiFi connectivity
  • 802.11 b/g/n20
  • Channels 1 to 14 at 2.4 Ghz
  • Support Bluetooth LE (Bluetooth Low Energy) 4.2
  • Support WPA and WPA 2 security modes
  • Up to +18 dBm output power in 802.11b mode
  • Support SmartConfig functions for Android and iOS devices
  • Onboard PCB antenna
  • Working temperature: -20℃ to 85℃

Applications

• Intelligent building
• Smart household and home appliances
• Smart socket and light
• Industrial wireless control
• Baby monitor
• Network camera
• Intelligent bus

Change History

Serial Number	Update Date	Updated Content	Version after Update
1	2/26/2020	This is the first release.	V2.0.0

Module Interfaces

Dimensions and Footprint

The electrical interface of JWBR2S-3.3V is the PH-4AW connector with a spacing of 2.0 mm.
As shown in the following figure, the dimensions of JWBR2S-3.3V are 42.6±0.35 mm (L)×31±0.35 mm (W) ×9.1±0.15 mm (H). The thickness of the PCB is 1.2±0.1 mm.

Pin Definition

Pin Number	Symbol	I/O Type	Function
1	RX	I/O	UART0_RXD, receiver for communication of the module, input the level of 3.3V TTL
2	TX	I/O	UART0_TXD, transmitter for communication of the module, output the level of 3.3V TTL
3	GND	P	Power supply reference ground
4	VCC	P	Power supply pin (3.3V)

Note: P indicates power supply pins and I/O indicates input/output pins.

Definitions on Test Points

Pin Number	Symbol	I/O Type	Function
1	3.3V	P	Power supply pin inside the module (3.3V)
2	GND	P	Power supply reference ground
3	Log_Tx	I/O	UART_Log_TXD (used to display the internal information of the module)
4	Log_Rx	I/O	UART_Log_RXD (used to display the internal information of the module)
5	RXD	I/O	Programming interface for firmware of the module
6	TXD	I/O	Programming interface for firmware of the module
7	A_0	I/O	GPIOA_0, programming interface for firmware of the module During download, the pin needs to be pulled to 3.3V.
8	RST	I/O	Hardware reset pin

Note: P indicates power supply pins, I/O indicates input/output pins and test points are prohibited.

Electrical Parameters

Absolute Electrical Parameters

Parameter	Description	Minimum value	Maximum Value	Unit
Ts	Storage temperature	-40	105	℃
VBAT	Power supply voltage	-0.3	3.3	V
Static electricity discharge voltage (human body model)	TAMB-25℃	-	2	KV
Static electricity discharge voltage (machine model)	TAMB-25℃	-	0.5	KV

Normal Working Conditions

Parameter	Description	Minimum value	Typical Value	Maximum Value	Unit
Ta	Working temperature	-20	-	85	℃
VBAT	Power supply voltage	3.0	3.3	3.6	V
VIL	IO low-level input	-0.3	-	VCC*0.25	V
VIH	IO high-level input	VCC*0.75	-	VCC	V
VOL	IO low-level output	-	-	VCC*0.1	V
VOH	IO high-level output	VCC*0.8	-	VCC	V
Imax	IO drive current	-	-	16	mA
Cpad	Input pin capacitance	-	2	-	pF

TX Power Consumption:

Working Status	Mode	Rate	Transmit Power	Average Value	Peak Value (Typical Value))	Unit
Transmit	11b	11Mbps	+17 dBm	217	268	mA
Transmit	11b	11Mbps	+18 dBm	225	280	mA
Transmit	11 g	54Mbps	+15 dBm	159	188	mA
Transmit	11 g	54Mbps	+17.5 dBm	177	213	mA
Transmit	11n BW20	MCS7	+13 dBm	145	167	mA
Transmit	11n BW20	MCS7	+16.5 dBm	165	193	mA

RX power consumption:

Working Status	Mode	Receive	Average Value	Peak Value (Typical Value))	Unit
Receive	CPU Sleep	11Mbps	63	75	mA
Receive	CPU Active	54Mbps	65	78	mA
Receive	CPU Active	MCS7	65	78	mA

Power Consumption in Working Mode

Working Mode	Working Status, Ta = 25°C	Average Value	Peak Value (Typical Value)	Unit
Quick connection network state	The module is in the fast network connection state	74	324	mA
Network connection idle state	The module is in the network connection idle state	62	320	mA
Network connection operation state	The module is connected to the network	65	315	mA
Disconnected state	The module is disconnected	66	322	mA

Note: The peak lasts about 5us. The above parameters may vary with different firmware functions.

RF Parameters

Basic RF Features

Parameter	Description
Working frequency	2.400 to 2.484GHz
WiFi standard	IEEE 802.11 b/g/n (channels 1 to 14)
Data transmission rate	11b: 1, 2, 5.5, 11 (Mbps); 11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps); 11n: HT20 MCS 0 to 7
Antenna type	IPEX Antenna

TX Performance

TX performance

Parameter	Minimum Value	Typical Value	Maximum Value	Unit
Average RF output power, 802.11b CCK Mode 11M	-	17.5	-	dBm
Average RF output power, 802.11g OFDM Mode 54M	-	14.5	-	dBm
Average RF output power, 802.11n OFDM Mode MCS7	-	13.5	-	dBm
Frequency error	-20	-	20	ppm

RX Performance

RX sensitivity

Parameter	Minimum Value	Typical Value	Maximum Value	Unit
PER<8%, RX sensitivity, 802.11b DSSS Mode 1M	-	-91	-	dBm
PER<10%, RX sensitivity, 802.11g OFDM Mode 54M	-	-75	-	dBm
PER<10%, RX sensitivity, 802.11n OFDM Mode MCS7	-	-72	-	dBm

Antenna Information

Antenna Type

JWBR2S-3.3V uses two types of antennas: onboard PCB antenna and external antenna. By defalut, the onboard PCB antenna is preferred.

Antenna Interference Reduction

To ensure optimal WiFi performance when the WiFi module uses an onboard PCB antenna, it is recommended that the antenna be at least 15 mm away from other metal parts.
To ensure the antenna performance, the PCB should not be routed or clad with copper in the antenna area.

Antenna Connector Specifications

There is no antenna connector for this module for the moment.

Packaging Information and Production Instructions

Mechanical Dimensions

Specifications of a Terminal
The specifications of the terminal are 2.0 mm*4 Pin. Detailed parameters are as follows:

Parameters of the Shell

Production Instructions

Storage conditions for a delivered module are as follows:
1. The moisture-proof bag must be placed in an environment where the temperature is below 30°C and the relative humidity is lower than 85%.
2. The shelf life of a dry-packaged product is 6 months from the date when the product is packaged and sealed.
Caution:
1. In the production process, all operators must wear electrostatic rings.
2. During operation, strictly prevent the module from getting wet or dirty.

Recommended Oven Temperature Curve

Perform SMT based on the following reflow oven temperature curve. The highest temperature is 245°C. The reflow temperature curve is shown as belows:

Storage conditions

MOQ and Packaging Information

Product Number	MOQ (pcs)	Shipping packaging method	The number of modules per carton (pcs)	The number of reels per carton (reel)
JWBR2S-3.3V		Packaging through bubble bags	200	2