CL-BTT8-01 Datasheet

Last Updated on : 2024-04-03 08:51:38download

This topic describes Tuya’s proprietary CL-BTT8-01 radar and Bluetooth low energy (LE) printed circuit board assembly (PCBA). It consists of a highly integrated TLSR8250F512ET32 Bluetooth chip, a radar IC, and a few peripheral circuits. It has built-in Bluetooth protocol stacks and a rich set of library functions.


CL-BTT8-01 is built around a 32-bit MCU with 4 Mbits flash and 48 Kbyte SRAM. It has 5 GPIOs and one I2C interface. The embedded 2.4 GHz radio supports Bluetooth 5.0 LE. It uses radar sensing and is not affected by ambient temperature, humidity, airflow, dust, noise, light and dark when working. The module has built-in multiple filtering algorithms with strong anti-interference capability, and the signal can penetrate non-metallic materials such as glass and acrylic.

Therefore, the module can be used in various scenarios such as detecting human presence or sensing moving objects, making it especially suitable for garage lighting.


  • Built-in low-power 32-bit MCU that also acts as an application processor.
    • Clock rate of 48 MHz
  • Operating voltage range: 3.6V to 6.0V
  • Peripherals: 5 GPIO pins and 1 I2C interface
  • Bluetooth LE radio frequency (RF) features
    • Bluetooth LE 5.0
    • RF data rate of up to 2 Mbit/s
    • Transmitter power: +8 dBm
    • Receiver sensitivity: -92 dBm@Bluetooth LE 1 Mbit/s
  • Integrated microwave sensor (radar) with Doppler effect
    • 5.8 GHz ISM band
    • Sensing distance and delay can be flexibly adjusted as needed
    • Self-calibration function, not affected by external interference, supporting dense distribution
  • Embedded hardware Advanced Encryption Standard (AES) encryption
  • The chip has built-in LDO and supports a power supply with a wide voltage range.
  • Onboard PCB antenna
  • Operating temperature range: -20°C to +85°C.

Scope of applications

  • Smart garage lighting
  • Smart industrial lighting
  • Smart office lighting

Module interfaces

Dimensions and footprint

CL-BTT8-01 has three rows of pins with a 2.0±0.1 mm pin spacing.

CL-BTT8-01 dimensions are 20±0.35 mm (W) × 33±0.35 mm (L) × 7.1±0.35 mm (H).

CL-BTT8-01 DatasheetCL-BTT8-01 Datasheet

Pin definition

Pin No. Symbol I/O type Description
1 C2 I/O Support hardware PWM, corresponding to C2 (Pin 22) on the IC.
2 C3 I/O Support hardware PWM, corresponding to C3 (Pin 23) on the IC.
3 D2 I/O Support hardware PWM, corresponding to D2 (Pin 31) on the IC.
4 B4 I/O Support hardware PWM, corresponding to B4 (Pin 14) on the IC.
5 B5 I/O Support hardware PWM, corresponding to B5 (Pin 15) on the IC.
6 GND P Ground pin.
7 VCC P Power supply pin (5V).
8 SCL I/O Clock pin, connected to I2C, corresponding to C1 (Pin 21) on the IC.
9 SDA I/O Data pin, connected to I2C, corresponding to C0 (Pin 20) on the IC.
10 EN I Reset pin, corresponding to RESETB on the IC. It is effective when pulled down.
Test point SWS I/O Used for firmware flashing, corresponding to SWS (Pin 5) on the IC.
Test point ADC AO Outputs the radar intermediate frequency signal.
Test point TX I/O Uart_TXD, corresponding to B1 (Pin 6) on the IC.
Test point RX I/O Uart_RXD, corresponding to B7 (Pin 17) on the IC.
  • P indicates the power pin, I/O indicates the input and output pin, and AO indicates analog output signal.
  • If you have requirements for the number of PWM output control channels and color temperature, please contact Tuya’s business personnel.

Electrical parameters

Absolute electrical parameters

Parameter Description Min value Max value Unit
Ts Storage temperature -35 90 °C
VCC Supply voltage -0.3 7.0 V
Electrostatic discharge voltage (human body model) TAMB-25°C - 2 kV
Electrostatic discharge voltage (machine model) TAMB-25°C - 0.5 kV

Operating conditions

Parameter Description Min value Typical value Max value Unit
Ta Operating temperature -20 - 85 °C
VCC Operating voltage 3.6 5.0 6.0 V
VIL I/O low-level input VSS - 0.9 V
VIH I/O high-level input 2.4 - 3.5 V
VOL I/O low-level output VSS - 0.33 V
VOH I/O high-level output 2.97 - 3.5 V

Power consumption in working mode

Symbol Condition Max (Typical) Unit
Itx Continuous transmission, with an output power of 8 dBm 49 mA
Irx Continuous reception 31 mA
IDC Average value when connected over Bluetooth mesh 23 mA
IDC Peak value when connected over Bluetooth mesh 49 mA
Ideepsleep Deep sleep mode (RAM not reserved), low power mode of the radar 360 μA

RF parameters

Basic RF features

Parameter Description
Bluetooth operating frequency 2.4 GHz ISM band
Radar operating frequency 5.8 GHz ISM band
Wireless standard Bluetooth LE 5.0
Data transmission rate 1 Mbit/s and 2 Mbit/s
Antenna type Onboard PCB antenna

RF output power

Parameter Min value Typical value Max value Unit
Bluetooth average output power -22 8 10 dBm
Bandwidth of 20 dB Bluetooth modulation signal (1 Mbit/s) - 2500 - kHz
Bandwidth of 20 dB Bluetooth modulation signal (2 Mbit/s) - 1400 - kHz
Radar transmit frequency 5735 - 5840 MHz
Radar transmit power - 0.2 0.5 mW

RF receiving sensitivity

Parameter Min value Typical value Max value Unit
Bluetooth RX sensitivity at 1 Mbit/s - -92 - dBm
Bluetooth RX sensitivity at 2 Mbit/s - -89 - dBm
Bluetooth frequency offset error at 1 Mbit/s -250 - +300 kHz
Bluetooth frequency offset error at 2 Mbit/s -300 - +200 kHz
Bluetooth co-channel interference suppression - -10 - dB

Radar detection range

The sensing sensitivity of the radar sensor can be configured through Bluetooth. Its forward limit sensing distance is 10 meters. You can adjust the actual sensing distance appropriately as needed.

The figure below is a schematic diagram of the radar detection range in a typical scenario. The higher the sensitivity, the larger the detection range. The dark area in the figure is a high-sensitivity detection area, in which objects can be completely detected. The light-colored area is a low-sensitivity detection area, in which objects can be basically detected.

CL-BTT8-01 Datasheet

Antenna information

Antenna type

The onboard PCB antenna is used.

Antenna interference reduction

  • The distance between the antenna (Bluetooth antenna and radar antenna) and other mental components should be at least 15 mm to provide the best radio performance. And there are no metal obstructions on the RF path.
  • Try to avoid pointing the radar antenna directly toward large metal devices or pipes.
  • When installing multiple PCBAs, try to make sure that the radar antennas are parallel to each other to avoid direct irradiation, and keep a distance of more than 1m between antennas.
  • When the radar sensor works in low power mode, we do not recommend using it in scenarios close to switching power supply drives.

Packing and production instructions

Mechanical dimensions

The PCBA dimensions are 20±0.35 mm (W) × 33±0.35 mm (L) × 7.1±0.35 mm (H).

CL-BTT8-01 Datasheet

CL-BTT8-01 Datasheet

PCB package

CL-BTT8-01 Datasheet

Production instructions

  1. We recommend using a wave soldering device to solder Tuya’s DIP modules, and manual soldering can be used only when a wave soldering device is unavailable. Complete soldering within 24 hours after unpacking. Otherwise, place the module in a drying cupboard with a relative humidity level of no more than 10%, or pack the module in vacuum again. Then, record the packing time and duration of exposure. The total exposure duration cannot exceed 168 hours.
  2. Soldering device and materials:
    • Wave soldering device
    • Wave soldering fixture
    • Constant-temperature soldering iron
    • Tin bar, tin wire, and flux
    • Thermal profiler
  3. Instruments or devices required for the baking process:
    • Cabinet oven
    • Anti-electrostatic and heat-resistant trays
    • Anti-electrostatic and heat-resistant gloves
  4. The module needs to be baked in the following cases:
    • The vacuum packaging bag is damaged before unpacking.
    • After unpacking, no HIC is found in the packaging bag.
    • After unpacking, the HIC indicates a humidity level of 10% or higher. In this case, the circle turns pink on the HIC.
    • The total exposure time has lasted for over 168 hours since unpacking.
    • More than 12 months have passed since the first sealing of the bag.
  5. The baking parameter settings are described below:
    • Baking temperature: 60°C for reel packaging with relative humidity ≤ 5%. And 125°C for tray packaging with relative humidity ≤ 5% (use the heat-resistant tray, rather than plastic containers).
    • Baking time: 48 hours for reel packaging and 12 hours for tray packaging.
    • Temperature for triggering an alert: 65°C for reel packaging and 135°C for tray packaging.
    • Production can begin after a module has cooled down to below 36°C under natural conditions.
    • If a module remains unused for over 168 hours after being baked, it needs to be baked again.
    • If a batch of modules is not baked after exposure for more than 168 hours, do not use wave soldering to solder them. Because these modules are level-3 moisture-sensitive devices, they are very likely to get damp when exposed beyond the allowable time. In this case, if they are soldered at high temperatures, device failure or poor soldering performance might occur.
  6. In the whole production process, take electrostatic discharge (ESD) protective measures.
  7. In order to ensure good product quality, focus on the amount of flux sprayed and peak height during production. Check whether the tin slag and copper contents in the wave soldering tank exceed the standard amount, whether the fixture opening and thickness are appropriate, and whether the oven temperature curve of the wave soldering is proper.
  8. With a built-in crystal oscillator, this product can generally be cleaned with an ordinary detergent or ultrasonic wave. However, in some cases, vibrations generated by an ultrasonic cleaner can damage the internal structure of the crystal oscillator. If you use an ultrasonic cleaner, you need to verify in advance to make sure the crystal oscillator inside the module is protected from any possible damage.
  9. During product installation or processing, ultrasonic soldering is not recommended, because it might lead to excessive internal vibration or even failure of the crystal oscillator in the module.

Recommended oven temperature curve and temperature

Set the oven temperatures according to the following temperature curve of wave soldering. The peak temperature is 260°C±5°C.

Oven temperature curve

CL-BTT8-01 Datasheet

Suggestions on the soldering temperature:

Suggestions on wave soldering Suggestions on manual soldering
Preheat temperature 80°C to 130°C Soldering temperature 360°C ± 20°C
Preheat duration 75s to 100s Soldering duration Less than 3s/point
Contact duration at the peak 3s to 5s N/A N/A
Solder tank temperature 260 ± 5°C N/A N/A
Ramp-up slope ≤ 2°C/s N/A N/A
Ramp-down slope ≤ 6°C/s N/A N/A

Storage conditions

A delivered module must meet the following storage requirements:

  • The moisture-proof bag must be packed in vacuum and placed in an environment where the temperature is below 40°C and the relative humidity is lower than 90%.

  • The shelf life of a dry-packaged product is 12 months from the date when the product is packaged and sealed.

  • A humidity indicator card (HIC) is put in the sealed package.

    CL-BTT8-01 Datasheet

    CL-BTT8-01 Datasheet

MOQ and packaging information

Product model MOQ (pcs) Shipping packaging Modules per reel Reels per carton
CL-BTT8-01 1,200 Tape and reel 300 4

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 to 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 operate simultaneously with other radios in the host system except by 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 to the end-user.

The host product manufacturer is responsible for compliance with any other FCC rules that apply 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”.

The RF module is considered as a limited modular transmitter according to FCC rules. Even though the RF module gets an FCC ID, the host product manufacturer can not use the FCC ID on the final product directly. In these circumstances, the host product manufacturer integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining FCC authorization by a Class II permissive change application or a new application.

CE Caution: This equipment has been tested and found to comply with the limits for an EN 300 440 v2.2.1 receiver Category 3. These limits are designed to provide reasonable protection against harmful interference in a residential installation. When placed in the vicinity of other device(s) radiating in the 5735 MHz-5840 MHz band, this device will inadvertency trigger on, or will fail to switch off with its movement sensor capability being impaired. Please take appropriate measures to mitigate this eventuality.

Declaration of Conformity European Notice

CL-BTT8-01 Datasheet

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

CL-BTT8-01 Datasheet

This product must not be disposed of as normal household waste, in accordance with the EU directive for waste electrical and electronic equipment (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 from the human body.