TCWBRCU1 datasheet

Product overview

TCWBRCU1 is a low-power embedded Wi-Fi+BLE adapter board that Tuya has developed. Embedded with the Wi-Fi network protocol stack and rich library functions, it consists of a highly integrated RF chip (RTL8720CF). With a maximum clock rate of 100 MHz, TCWBRCU1 also contains a low-power KM4 MCU, a WLAN MAC, a 1T1R WLAN, a 256-KB SRAM, a 2-MB flash memory, and rich peripherals.
TCWBRCU1 is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP. You can develop embedded Wi-Fi products as required.

Features

• Embedded low-power KM4 MCU, 100 MHz, which can also function as an application processor

• Wi-Fi/Bluetooth connectivity

  • 802.11 b/g/n20
  • Channels 1 to 14@2.4 GHz (CH1 to 11 for US/CA and CH1 to 13 for EU/CN)
  • Support WEP, WPA, WPA2, and WPA2 PSK (AES) security modes
  • Support Bluetooth Low Energy 4.2
  • Up to + 20 dBm output power in 802.11b mode
  • Support SmartConfig functions for Android and iOS devices
  • Onboard PCB antenna
  • Passed CE and FCC certifications
  • 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

Update date	Updated content	Version after update
2020-10-14	This is the first release.	V1.0

Interfaces

Dimensions and footprint

TCWBRCU1 adopts USB serial communication. The serial ports are shown as below:

Pin number	Symbol	I/O type	Function
1	5V	P	5V power input
2	GND	P	Power supply reference ground
3	RX	I/O	Serial port RX
4	TX	I/O	Serial port TX

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

The dimensions of TCWBRCU1 are as follows:

Electrical parameters

Electrical parameters

Parameter	Minimum value	Maximum value	Unit
Input voltage range	4.5	5.5	V
Operating temperature	-20	85	℃
Operating humidity	0%	90%	RH
Storage temperature	-20	85	℃

RF power consumption

TX power consumption

Symbol	Mode	Power	Average value	Peak value (Typical value)	Unit
IRF	11b 11Mbps	17 dBm	217	268	mA
IRF	11b 11Mbps	18 dBm	231	283	mA
IRF	11g 54Mbps	15 dBm	159	188	mA
IRF	11g 54Mbps	17.5 dBm	177	213	mA
IRF	11n BW20 MCS7	13 dBm	145	167	mA
IRF	11n BW20 MCS7	16.5 dBm	165	193	mA

RX power consumption

Symbol	Mode	Average value	Peak value (Typical value)	Unit
IRF	11B 11M	63	65	mA
IRF	11G 54M	65	67	mA
IRF	11N HT20 MCS7	65	67	mA

Working power consumption

Working mode	Working status, TA = 25°C	Average value	Peak value (Typical value)	Unit
Quick connection state	The module is in the fast network connection state and the Wi-Fi indicator always flashes	75	324	mA
Connected and idle	The module is connected to the network and the Wi-Fi indicator is always on	64	314	mA
Connected	The module is connected to the network and the Wi-Fi indicator is always on	66	305	mA
Disconnected	The module is disconnected and the Wi-Fi indicator is dark	66	309	mA

RF parameters

Basic RF features

Parameter	Description
Frequency range	2.400 to 2.4835 GHz
Wi-Fi standard	IEEE 802.11b/g/n (channels 1 to 14)
Bluetooth standard	Bluetooth 4.2
Data transmission rate	11b: 1, 2, 5.5, and 11 (Mbps)
Data transmission rate	11g: 6, 9, 12, 18, 24, 36, 48, and 54 (Mbps)
Data transmission rate	11n: HT20 MCS 0 to 7
Antenna type	PCB antenna with a gain of 2.5 dBi

TX performance

Parameter	Minimum value	Typical value	Maximum value	Unit
Average RF output power, 802.11b CCK Mode 1M	-	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
Average RF output power, BLE 4.2 1M	-	6.5	-	dBm
Frequency error	-20	-	20	ppm
EVM@802.11b CCK 11 Mbps Mode 17.5 dBm	-	-	-10	dB
EVM@802.11g OFDM 54 Mbps Mode 14.5 dBm	-	-	-29	dB
EVM@802.11n OFDM MCS7 Mode 13.5 dBm	-	-	-30	dB

RX performance

Parameter	Minimum value	Typical value	Maximum value	Unit
PER<8%, RX sensitivity, 802.11b CCK 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
PER<10%, RX sensitivity, BLE 4.2 1M	-	\ -93	-	dBm

Appendix: Statement

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this device.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Note: This device has been tested and found to comply with the limits for a Class B digital device, according to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy and, if not installed and used following the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

If this device does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the device and receiver.
• Connect the device into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Radiation Exposure Statement

This device complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This device should be installed and operated with a minimum distance of 20cm between the radiator and your body.

Important Note

This radio module must not be installed to co-locate and operating simultaneously with other radios in the host system except following FCC multi-transmitter product procedures. Additional testing and device authorization may be required to operate simultaneously with other radios.

The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end-user.

The host product manufacturer is responsible for compliance with any other FCC rule that applies to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.

The end-user manual shall include all required regulatory information/warnings as shown in this manual, including “This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body.”

This device has got an FCC ID: 2ANDL-TCWBRCU1. The end product must be labelled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-TCWBRCU1”.

This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20cm is maintained between the antenna and users, and 2) The transmitter module may not be co-located with any other transmitter or antenna.
As long as the 2 conditions above are met, further transmitter tests will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.

Declaration of Conformity European Notice

Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module product is in compliance with essential requirements and other relevant provisions of Directive 2014/53/EU,2011/65/EU. A copy of the Declaration of conformity can be found at https://www.tuya.com.

This product must not be disposed of as normal household waste, in accordance with the EU directive for a waste electrical and electronic device (WEEE- 2012/19/EU). Instead, it should be disposed of by returning it to the point of sale, or to a municipal recycling collection point.

The device could be used with a separation distance of 20cm to the human body.