ACW01-B module datasheet

Product overview

Developed by Tuya, ACW01-B is a Wi-Fi module that is suitable for serial communication in which the level is changed to 3.3V from 5-12V. If added with a 344-mm connection wire and housing, it will become a Wi-Fi adapter board. It consists of a highly integrated RF chip (RTL 8710BN), an extended flash chip, and a DC-DC chip. Besides, it is also built-in with the Wi-Fi network protocol stack and rich library functions. ACW01-B further includes a low-power 32-bit CPU, 1-MB flash memory, and 256-KB SRAM.

The CW01 adapter board is a RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP. On the basis of the serial communication manner, you can develop embedded Wi-Fi products as required.
The diagram of the architecture of ACW01-B is shown below:

Features

• Embedded low-power 32-bit CPU, which can also function as an application processor

  • Clock rate: 125 MHz

• Working voltage: 5 to 12V

• Peripheral: 1 UART (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 functions for Android and iOS devices

  • Onboard antenna and external antenna with an IPEX connector

  • Working temperature: -20 to 85℃

Applications

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

Module interfaces

Dimensions and footprint

The dimensions of the adapter board are 29.7 mm (W)×51 mm (L) ×4.5 mm (H), which are shown as belows:

Pin definition

The definitions of pins are shown in the following table:

Pin number	Symbol	Type	Function
1	12V	P	Power supply pin (5 to 12V)
2	TXD	I/O	Transmitting interface (5V)
3	RXD	I/O	Receiving interface (5V)
4	GND	P	Power supply reference ground

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

Definitions on test points

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

Pin number	Symbol	Type	Function
1	12V	P	Power supply pin (5 to 12V)
2	TXD	I/O	Transmitting interface (5V)
3	RXD	I/O	Receiving interface (5V)
4	GND	P	Power supply reference ground
5	WIFI_RX	I/O	The firmware authorization interface of the Wi-Fi module
6	WIFI_TX	I/O	The firmware authorization interface of the Wi-Fi module
7	LOG_TXD	I/O	The transmitting interface for data burning
8	LOG_RXD	I/O	The receving interface for data burning
9	3.3V	P	Pin for data burning (3.3V)
10	RST	P	Reset pin

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

Electrical parameters

Absolute electrical parameters

Parameter	Description	Minimum value	Maximum value	Unit
Ts	Storage temperature	-20	85	℃
VCC	Supply voltage	-0.3	13.2	V
ESD voltage (human body model)	TAMB-25℃	-	2	KV
ESD voltage (machine model)	TAMB-25℃	-	0.5	KV

Working conditions

Normal working conditions

Parameter	Description	Minimum value	Typical value	Maximum value	Unit
Ta	Working temperature	-20	-	85	℃
VCC	Working voltage	4.5	5	12.5	V
VIL	I/O low level input	-0.3	-	5*0.25	V
VIH	I/O high-level input	5*0.75	-	5	V
VOL	I/O low level output	-	-	5*0.1	V
VOH	I/O high level output	5*0.8	-	5	V
Imax	I/O drive current	-	-	16	mA

Wi-Fi transmission power consumption

TX power consumption:

Symbol	Mode	Power	Typical value	Unit
IRF	11b	17dBm	120	mA
IRF	11b	18dBm	128	mA
IRF	11g	15dBm	113	mA
IRF	11g	17.5dBm	115	mA
IRF	11n (20M)	13dBm	112	mA
IRF	11n (20M)	16.5dBm	118	mA
IRF	11n (40M)	13dBm	106	mA
IRF	11n (40M)	16.5dBm	110	mA

Note: The typical value of the current is obtained when the adapter board is at the voltage of 12V.

Wi-Fi receiving power consumption

RX power consumption:

Symbol	Mode	Typical value	Unit
IRF	CPU Sleep	90	mA
IRF	CPU Active	120	mA

Power consumption in working mode

Working mode	Working status, Ta = 25°C	Average value	Maximum value	Unit
Connecting to the network fast	The module is connecting to the network	80	120	mA
Connecting to the network fast	The module is connecting to the network	85	115	mA
Connected to the network	The module is connected to the network	60	90	mA

RF features

Basic RF features

Parameter	Description
Working 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, 54 (Mbps) 11n: HT20 MCS 0 to 7; HT40 MCS 0 to 7
Antenna type	PCB antenna or antenna used with a U.FL RF connector

Wi-Fi output power

TX power

Parameter		Minimum value	Typical value	Maximum value	Unit
Average RF output power, 802.11b CCK Mode	1M	-	18	-	dBm
Average RF output power, 802.11g OFDM Mode	54M	-	16	-	dBm
Average RF output power, 802.11n/n20 OFDM Mode	MCS7	-	14	-	dBm
Average RF output power, 802.11n/n40 OFDM Mode	MCS7	-	14	-	dBm
Frequency error		-20	-	20	ppm

WiFi Receiving Sensitivity

RX sensitivity

Parameter		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

ACW01-B supports two types of antennas: Onboard antenna and external antenna. By default, the onboard PCB antenna is preferred. If you use the external antenna, please contact Tuya sales personnel.

Antenna interference reduction

To ensure 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.

U.FL RF connector

Parameters of the U.FL RF connector are as belows:

Footprint information

Mechanical dimensions

Note: The PCB is 1 mm thick. The dimensional tolerance of the PCB outline is ±0.35 mm, and the dimensional tolerance of the thickness of the PCB is ±0.10 mm.

Footprint of connector

Production instructions

Storage conditions for a delivered module are as follows:

• 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.

Structural parts and housing

The lower cover of the Wi-Fi adapter board:

The upper cover of the Wi-Fi adapter board: