T211x-WBR1-IPEX Module Datasheet

T211x-WBR1-IPEX is a Wi-Fi module developed by Tuya Smart and designed for 3.3V serial communication. The module is composed of Tuya’s proprietary Wi-Fi module WBR1-IPEX and a level translator, with a built-in Wi-Fi network protocol stack and Tuya’s serial protocol.

Overview

T211x-WBR1-IPEX combines a low-power KM4 microcontroller unit (MCU), WLAN MAC, and 1 transmitter/1 receiver (1T1R) design. This module provides output frequency up to 100 MHz, 256 KB embedded SRAM, 2 MB flash memory, and configurable GPIOs that can function as digital peripherals for diverse applications.

T211x-WBR1-IPEX is a real-time operating system (RTOS), integrated with all Wi-Fi MAC and TCP/IP libraries. All these resources can help develop your own embedded Wi-Fi products.

Features

• Built-in low-power KM4 MCU that also acts as an application processor.
• Clock rate of 100 MHz.
• Operating voltage range: 3.3V.
• Peripheral: 1 universal asynchronous receiver/transmitter (UART).
• Wi-Fi connectivity
  • IEEE 802.11 b/g/n20.
  • Channels 1–14@2.4 GHz (CH1–11 for US/CA and CH1–13 for EU/CN).
  • Support security protocols like WPA and WPA2.
  • The maximum output power is +20 dBm for IEEE 802.11b transmission.
  • Two pairing modes are supported, namely Wi-Fi Easy Connect (EZ mode) and access point (AP) mode. Both modes are suitable for pairing with Android and iOS mobile phones.
• PCB antenna and external antenna with IPEX connector.
• Operating temperature range: -20°C to +85°C.

Scope of applications

• Smart building
• Smart home and electrical appliance
• Smart socket and light
• Industrial wireless control
• Baby monitor
• IP camera
• Smart bus

Interfaces

Dimensions and footprint

The electrical interface of this module is a vertical pin seat and ZH1.5mm pitch male socket with a 4P connector, and the pin pitch is 1.5 mm.
The dimensions are 29.95±0.35 mm (W) × 32.95±0.35 mm (L) × 6.35±0.15 mm (H). The PCB is 1.2 mm±0.1 mm thick, and the PCB dimensions are shown in the figure below:

Pin definition

Pin No.	Symbol	I/O type	Description
1	RX	I/O	RX port on the module
2	TX	I/O	TX port on the module
3	GND	P	Ground pin.
4	VCC	P	Power supply pin (3.3V).

Definitions of test pins

Pin No.	Symbol	I/O type	Description
5	3.3V	P	Power supply pin (3.3V) in the module.
6	GND	P	Ground pin.
7	U0RX	I/O	Firmware flashing port.
8	U0TX	I/O	Firmware flashing port.

Electrical parameters

Absolute electrical parameters

Parameter	Description	Min value	Max value	Unit
Ts	Storage temperature	-40	125	°C
VBAT	Supply voltage	-0.3	3.6	V
Electrostatic discharge voltage (human body model)	TAMB -25°C	-	2	kV
Electrostatic discharge voltage (machine model)	TAMB -25°C	-	0.5	kV

Normal operating conditions

Parameter	Description	Min value	Typical value	Max value	Unit
Ta	Operating temperature	-20	-	85	°C
VBAT	Supply voltage	3.0	3.3	3.6	V
VIL	I/O low-level input	-0.3	-	VCC × 0.25	V
VIH	I/O high-level input	VCC × 0.75	-	VCC	V
VOL	I/O low-level output	-	-	VCC × 0.1	V
VoH	I/O high-level output	VCC × 0.8	-	VCC	V
Imax	I/O drive current	-	-	16	mA
Cpad	Input pin capacitor	-	2	-	pF

Power consumption during continuous transmission

Working status	Mode	Rate	Transmission power	Average value	Peak (Typical) value	Unit
Transmit	11b	11 Mbit/s	+18 dBm	231	283	mA
Transmit	11b	11 Mbit/s	+17 dBm	217	268	mA
Transmit	11g	54 Mbit/s	+15 dBm	159	188	mA
Transmit	11g	54 Mbit/s	+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

Power consumption during continuous reception

Working status	Mode	Rate	Receive	Average value	Peak (Typical) value	Unit
Receive	CPU sleep	11 Mbit/s	Continuous reception	63	-	mA
Receive	CPU active	MCS7 BW20	Continuous reception	65	-	mA

Power consumption in working mode

Work mode	Status (Ta = 25°C)	Average value	Peak (Typical) value	Unit
Quick pairing (Bluetooth)	The module is in EZ mode. The Wi-Fi network status indicator blinks quickly.	61	272	mA
Quick pairing (AP)	The module is in AP mode. The Wi-Fi network status indicator blinks slowly.	59	272	mA
Quick pairing (AP)	The module is in EZ mode. The Wi-Fi network status indicator blinks quickly.	62	280	mA
Idle	The module is connected to the cloud. The Wi-Fi network status indicator is steady on.	51	260	mA
Connected and operating	The module is connected to the cloud. The Wi-Fi network status indicator is steady on.	59	268	mA
Weakly connected	The connection between the module and the hotspot is intermittent. The Wi-Fi network status indicator is steady on.	62	264	mA
Disconnected	The module is disconnected from the cloud. The Wi-Fi network status indicator is steady off.	57	268	mA

RF parameters

Basic RF features

Parameter	Description
Operating frequency	2.412 to 2.484 GHz
Wi-Fi standard	IEEE 802.11b/g/n (channels 1–14)
Data transmission rate	IEEE 802.11b: 1, 2, 5.5, and 11 Mbit/s IEEE 802.11g: 6, 9, 12, 18, 24, 36, 48, and 54 Mbit/s IEEE 802.11n: HT20 MCS0–7 IEEE 802.11n: HT40 MCS0–7
Antenna type	External antenna with U.FL RF connector (default)

Transmission performance

TX continuous transmission performance

Parameter	Min value	Typical value	Max value	Unit
RF average output power, 802.11b CCK mode, 11M	-	17.5	-	dBm
RF average output power, 802.11g OFDM mode, 54M	-	14.5	-	dBm
RF average output power, 802.11n OFDM mode, MCS7	-	13.5	-	dBm
Frequency error	-20	-	20	ppm

Receiving performance

RX sensitivity

Parameter	Min value	Typical value	Max value	Unit
PER < 8%, RX sensitivity, 802.11b DSSS mode, 1M	-	-97	-	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

This module uses an external antenna with a U.FL RF connector.

U.FL RF connector

The following figure shows the parameters of the U.FL RF connector.

Antenna interference reduction

When a PCB antenna is used on a Wi-Fi module, we recommend that the module antenna is at least 15 mm away from other metal components. This can optimize the Wi-Fi performance. Make sure that the enclosure surrounding the antenna is not traced or filled with copper. Otherwise, the RF performance might be degraded.

Packing and production instructions

Mechanical dimensions

The PCB dimensions are 29.95±0.35 mm (W) × 32.95±0.35 mm (L) × 1.2±0.1 mm (H).

Terminals

The terminal specification is 1.5 mm × 4 pins. The detailed parameters are as follows:

Production instructions

A delivered module must meet the following storage requirements:

• 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%.
• The shelf life of a dry-packaged product is 6 months from the date when the product is packaged and sealed.

Things to note

• During the whole production process, operators at each station must wear electrostatic rings.
• During operation, keep the module away from water or dirt.

Recommended oven temperature curve

Perform the SMT process according to the following temperature curve of reflow soldering. The peak temperature is 245°C.

Storage conditions

MOQ and packaging information

Product model	MOQ (pcs)	Shipping packaging	Modules per carton (pcs)	Reels per carton
T211x-WBR1-IPEX	25	Pallet	200	2