TYJW2-CMI Module Datasheet

Product overview

Developed by Tuya, TYJW2-CMI is a Wi-Fi module suitable for serial communication of the 5V TTL. It consists of a highly integrated wireless RF chip (ESP8266EX) and an external flash chip, with an embedded Wi-Fi network protocol stack and rich library functions. TYJW2-CMI includes a low-power 32-bit CPU, 2-MB flash memory, and 36-KB SRAM.

TYJW2-CMI is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP. Based on the serial communication manner, you can develop the embedded Wi-Fi products as required.

Features

• Embedded with a low-power 32-bit CPU, which can also function as an application processor (The clock rate supports 80 MHz and 160 MHz)
• Operating voltage: 4.5 to 5.5V
• Peripheral: 1 UART (5V TTL)
• Wi-Fi connectivity
  • 802.11 b/g/n
  • Channels 1 to 14@2.4GHz
  • Support WPA/WPA2 security mode
  • Up to + 20dBm output power in 802.11b mode
  • Support STA/AP/STA+AP working mode
  • Support SmartConfig for Android and iOS devices
  • PCB antenna
• Operating temperature: -20℃ to 85℃

Applications

• Intelligent building
• Smart household
• Medical health care
• Industrial wireless control
• Handheld devices

Module interfaces

Dimensions and footprint

The electrical interface of TYJW2-CMI is the PHS connector with a spacing of 2.0 mm.

The dimensions of TYJW2-CMI are 49.6±0.35 mm (W)×31±0.35 mm (L)× 9.1±0.15 mm (H):

Pin definition

The definitions of pins of TYJW2-CMI are shown in the following table:

Pin number	Symbol	Type	Function
1	RX	I/O	The receiving interface of the module, which inputs the TTL level signal in the voltage of 5V
2	TX	I/O	The transmitting interface of the module, which outputs the TTL level signal in the voltage of 5V
3	GND	P	Power supply reference ground
4	VCC	P	Power input pin, 5V

Note: P indicates a power supply pin and I/O indicates an input/output pin

Definitions on test pins

The definitions of test pins of TYJW2-CMI are shown in the following table:

Pin number	Symbol	Type	Function
5	3.3V	P	Power supply pin inside the module (3.3V)
6	GND	P	Power supply reference ground
7	BOOT	I/O	Interface 0, it’s the pin for enabling/disabling the burning of the firmware of the module.
8	TXD1	I/O	An interface for displaying information of the module
9	RXD0	I/O	An interface for programming firmware of the module
10	TXD0	I/O	An interface for programming firmware of the module
11	RST	I/O	Hardware reset pin

Note:

• P indicates a power supply pin and I/O indicates an input/output pin.
• When the I/O 0 is pulled up, the module runs normally. When I/O 0 is at low level, the module is in the state of firmware programming.
• RST is only a hardware reset pin and cannot be used for clearing information about- network configuration.
• Test pins are not recommended for use.

Electrical parameters

Absolute electrical parameters

Parameter	Description	Minimum value	Maximum value	Unit
Ts	Storage temperature	-20	85	℃
VCC	Supply voltage	-0.3	5.5	V
ESD voltage (human body model)	TAMB-25℃	-	2	KV
ESD voltage (machine model)	TAMB-25℃	-	0.5	KV

Working conditions

Parameter	Description	Minimum value	Typical value	Maximum value	Unit
Ta	Operating temperature	-20	-	85	℃
VCC	Operating voltage	4.5	5	5.5	V
VIL	Voltage Input Low	-0.3	-	VCC*0.25	V
VIH	Voltage Input High	VCC*0.75	-	VCC	V
VOL	Voltage Output Low	-	-	VDD*0.1	V
VOH	Voltage Output High	VCC* 0.8	-	VCC	V
Imax	I/O drive current	-	-	5	mA

Wi-Fi transmission power consumption

TX power consumption:

Symbol	Mode	Rate	Typical value	Unit
IRF	11b	11Mbps	260	mA
IRF	11g	54Mbps	100	mA
IRF	11n	MCS7	100	mA

Wi-Fi receiving power consumption

RX power consumption:

Symbol	Mode	Rate	Typical value	Unit
IRF	11b	11Mbps	70	mA
IRF	11g	54Mbps	70	mA
IRF	11n	MCS7	70	mA

Power consumption in operating mode

The operating current of TYJW2-CMI is shown below:

Operating mode	Operating status, Ta = 25°C	Average value	Maximum value	Unit
Quick pairing	The module is in fast pairing state and the Wi-Fi indicator always flashes	90	462	mA
Hotspot	The module is in pairing state through the hotspot and the Wi-Fi indicator always flashes slowly	101	451	mA
Connected	The module is connected to the network and the Wi-Fi indicator is always on	82	435	mA
Disconnected state	The module is disconnected and the Wi-Fi indicator is off	156	430	mA

RF features

Basic RF features

Parameter	Description
Operating frequency	2.400 to 2.4835 GHz
Wi-Fi 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, and 54 (Mbps) 11n: HT20 MCS 0~7
Antenna type	PCB antenna

Wi-Fi output power

TX power consumption:

Parameter	Rate	Minimum value	Typical value	Maximum value	Unit
Average output power, 802.11b CCK Mode	1M	-	17	-	dBm
Average output power, 802.11g OFDM Mode	54M	-	15	-	dBm
Average output power, 802.11n OFDM Mode	MCS7	-	13.5	-	dBm
Frequency error		-10	-	10	ppm

Wi-Fi receiving sensitivity

RX sensitivity

Parameter	Rate	Minimum value	Typical value	Maximum value	Unit
PER<8%, RX sensitivity, 802.11b CCK Mode	1 M	-	-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

It adopts the PCB antenna with a gain of 2.5 dBi.

Antenna interference reduction

• To ensure the optimal Wi-Fi performance when the Wi-Fi module uses a 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 within the antenna area on the PCB.

Packaging information and production instructions

Mechanical dimensions

The dimensions of the PCB: 49.6±0.35 mm (W)×31±0.35 mm (L) ×1.6±0.15 mm (H).

Specifications of connection wire

Production instructions

Storage conditions for a delivered module:

• 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.

Caution:

• In the production process, all operators must wear electrostatic rings.
• During operation, strictly prevent the module from getting wet or dirty.

Storage conditions

MOQ and packaging information

Product model	MOQ (pcs)	Packaging method	Number of modules per carton	Number of reels per carton
TYJW2-CMI	400	Bubble bags	200	2