TYAUX-LM2 Module Datasheet

1. Overview

The TYAUX-LM2 module is a Wi-Fi and Bluetooth Low Energy (LE) combo module developed by Tuya Smart. This module consists of a highly integrated wireless RF chip W701-VA2-CG with built-in Wi-Fi stacks and various library functions.

TYAUX-LM2 combines a low-power KM4 microcontroller unit (MCU), WLAN MAC, and 1T1R (1 transmitter/1 receiver) 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.

TYAUX-LM2 is a real-time operating system (RTOS), integrated with all Wi-Fi MAC and TCP/IP libraries. All these resources can help you develop your own embedded Wi-Fi products.

1.1. Features

• Built-in low-power KM4 MCU that also acts as an application processor.
• Clock rate of 100 MHz.
• Operating voltage range: 4.5V to 18V.
• Peripheral: 1 universal asynchronous receiver/transmitter (UART).
• Wi-Fi and Bluetooth connectivity
• IEEE 802.11b/g/n20.
• Channels 1–14@2.4 GHz (CH1-11 for US/CA and CH1–13 for EU/CN).
• Support security protocols, including WEP, WPA, WPA2, and WPA2 PSK (AES).
• Support Bluetooth LE 4.2.
• Support Wi-Fi Easy Connect (EZ mode) pairing mode on Android and iOS devices.
• Onboard PCB antenna.
• It has passed CE and FCC certifications.
• Operating temperature range: -20°C to +85°C.

1.2. Scope of applications

• Smart building
• Smart home
• Smart socket
• Smart lighting
• Smart bus
• Industrial wireless control
• Baby monitor
• IP camera

2. Module Interfaces

2.1. Dimensions and footprint

The TYAUX-LM2 dimensions are 36.20±0.35 mm (W) × 57.30±0.35 mm (L) x 5.10±0.15 mm (H). The figure below shows the dimensions of the TYAUX-LM2 module.

Top View:

Diagram showing the top view of the TYAUX-LM2 module with dimensions:

• Width: 36.20 mm
• Length: 57.30 mm
• Non-plated through holes (NPTH) with R 1.75
• Other component placements indicated.

Side View:

• Dimensions: 1.60 x 1.00, 2.50

Bottom View:

• Pin labels: VD33, CHIP_EN, TX, RX, LOG_TX, LOG_RX, WIFI_TX, WIFI_RX, PWR_EN, GND, 12V.
• Non-plated through holes (NPTH)

2.2. Pin definition

3. Electrical parameters

3.1. Absolute electrical parameters

3.2. Operating conditions

3.3. Radio frequency (RF) power

Power consumption during continuous transmission (TX)

Power consumption during continuous reception (RX)

3.4. Power consumption in operating mode

4. RF parameters

4.1. Basic RF features

4.2. Transmitter (TX) performance

Continuous transmission performance:

Receiver (RX) performance:

5. Antenna information

5.1. Antenna type

This module has an onboard PCB antenna with a peak gain of 1.68 dBi.

5.2. Antenna interference reduction

When a PCB antenna is used on a Wi-Fi module, it is recommended that the module antenna be at least 15 mm away from other metal components. This can optimize the Wi-Fi performance.

6. Power-on and power-off sequence

6.1. Power-on sequence

The W701 chip has requirements for the power-on sequence. It is recommended that the time for the voltage to rise from 0V to 3.3V should be within 20ms.

Diagram illustrating the power-on sequence:

• VD33 rises from 0V to 3.3V within Tprdy.
• CHIP_EN goes high after VD33 reaches 3.3V.

6.2. Power-off sequence

Diagram illustrating the power-off sequence:

• VD33 drops below VBOR.
• CHIP_EN goes low.
• VDD_IO drops.

7. Footprint and production instructions

7.1. Mechanical dimensions

The TYAUX-LM2 module's PCB dimensions are 36.20±0.35 mm (W) × 57.30±0.35 mm (L) × 1.0±0.15 mm (H). The figure below shows the mechanical dimensions of TYAUX-LM2.

The default tolerance of the dimensions is ±0.35 mm. If you have special requirements for key dimensions, specify them in the datasheet after consultations.

7.2. Production instructions

• Package the module with the SMT if Tuya’s module is designed to be SMT packaged. After being unpacked, the module must be soldered within 24 hours. Otherwise, it needs to be put into a drying cupboard with a relative humidity level no greater than 10%, or packaged in vacuum again. Then, record the packing time and duration of exposure. The total exposure time cannot exceed 168 hours.
• Instruments or devices required for the SMT process:
  • Surface mount system
  • SPI
  • Reflow soldering machine
  • Thermal profiler
  • Automated optical inspection (AOI) equipment
• Instruments or devices required for the baking process:
  • Cabinet oven
  • Electrostatic discharge (ESD) protection and heat-resistant trays
  • ESD protection and heat-resistant gloves
• A delivered module must meet the following storage requirements:
  • The moisture-proof bag must be 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.
• 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.
• The baking parameter settings are described below:
  • Baking temperature: 40°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: 168 hours for reel packaging and 12 hours for tray packaging.
  • Temperature for triggering an alert: 50°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.
• In the whole production process, take electrostatic discharge (ESD) protective measures.
• To guarantee the pass rate, it is recommended to use the SPI and AOI to monitor the quality of solder paste printing and mounting.

7.3. Recommended oven temperature curve

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

Diagram of a reflow soldering temperature curve:

• A: temperature axis
• B: time axis
• C: alloy liquidus temperature from 217°C to 220°C
• D: ramp-up slope from 1°C/s to 3°C/s
• E: keep a constant temperature from 150°C to 200°C for a time period from 60s to 120s
• F: keep a temperature above liquidus temperature for 50s to 70s
• G: peak temperature from 235°C to 245°C
• H: ramp-down slope from 1°C/s to 4°C/s

The curve above is based on solder paste SAC305. For more information about other solder pastes, see the recommended oven temperature curve in the specified solder paste specifications.

7.4. Storage conditions

Caution: This bag contains MOISTURE-SENSITIVE DEVICES

• LEVEL 3
• 1. Calculated shelf life in sealed bag: 12 months at <40°C and <90% relative humidity (RH)
• 2. Peak package body temperature: 260°C
• 3. After bag is opened, devices that will be subjected to reflow solder or other high temperature process must be mounted within: 168 hours of factory conditions ≤30°C/60% RH, or Stored per J-STD-033
• 4. Devices require bake, before mounting, if:
  • a) Humidity Indicator Card reads >10% for level 2a - 5a devices or >60% for level 2 devices when read at 23 ± 5°C
  • b) 3a or 3b are not met
• 5. If baking is required, refer to IPC/JEDEC J-STD-033 for bake procedure
• Bag Seal Date: See Production Date
• Note: Level and body temperature defined by IPC/JEDEC J-STD-020

8. MOQ and packaging information

9. 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.

List of applicable FCC rules

This module has been granted modular approval as below listed FCC rule parts. FCC Rule parts 15C (15.247)

List of applicable ISED rules

This module has been certificated modular approval as below listed ISED Radio Standards Specifications. RSS 247 Issue 3. 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 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”.

This device has got an FCC ID: 2ANDL-TYAUX-LM2. The end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-TYAUX-LM2”.

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 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 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.

Industry Canada Statement

This device complies with Industry Canada's licence-exempt RSSs. Operation is subject to the following two conditions: (1) This device may not cause interference. (2) This device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage. (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique sub i, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Radiation Exposure Statement

This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20 cm between the radiator & your body.

Déclaration d'exposition aux radiations

Cet équipement est conforme aux limites d'exposition aux rayonnements ISED établies pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec un minimum de 20 cm de distance entre la source de rayonnement et votre corps. L'appareil peut interrompre automatiquement la transmission en cas d'absence d'informations à transmettre ou de panne opérationnelle. Notez que ceci n'est pas destiné à interdire la transmission d'informations de contrôle ou de signalisation ou l'utilisation de codes répétitifs lorsque cela est requis par la technologie.

This device is intended only for OEM integrators under the following conditions: (1) The antenna must be installed such that 20 cm is maintained between the antenna and users. (2) The transmitter module may not be co-located with any other transmitter or antenna. As long as 2 conditions above are met, further transmitter test 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.

Cet appareil est conçu uniquement pour les intégrateurs OEM dans les conditions suivantes: (Pour utilisation de dispositif module) (1) L'antenne doit être installée de telle sorte qu'une distance de 20 cm est respectée entre l'antenne et les utilisateurs. (2) Le module émetteur peut ne pas être coïmplanté avec un autre émetteur ou antenne.

Tant que les 2 conditions ci-dessus sont remplies, des essais supplé mentaires sur l'émetteur neseront pas nécessaires. Toutefois, l'intégrateur OEM est toujours responsable des essais sur son produit final pour toutes exigences de conformité supplémentaires requis pour ce module installé.

IMPORTANT NOTE

In the event that these conditions can not be met (for example certain laptop configurations or colocation with another transmitter), then the Canada authorization is no longer considered valid and the IC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate Canada authorization.

NOTE IMPORTANTE

Dans le cas où ces conditions ne peuvent être satisfaites (par exemple pour certaines configurations d'ordinateur portable ou de certaines co-localisation avec un autre émetteur), l'autorisation du Canada n'est plus considéré comme valide et l'ID IC ne peut pas être utilisé sur le produit final. Dans ces circonstances, l'intégrateur OEM sera chargé de réévaluer le produit final (y compris l'émetteur) et l'obtention d'une autorisation distincte au Canada.

End Product Labeling

This transmitter module is authorized only for use in device where the antenna may be installed such that 20 cm may be maintained between the antenna and users. The final end product must be labeled in a visible area with the following: “Contains IC:23243-TYAUXLM2”.

Plaque signalétique du produit final

Ce module émetteur est autorisé uniquement pour une utilisation dans un dispositif où l’antenne peut être installée de telle sorte qu’une distance de 20cm peut être maintenue entre l’antenne et les utilisateurs. Le produit final doit être étiqueté dans un endroit visible avec l’inscription suivante: “Contient des IC:23243-TYAUXLM2”.

Manual Information To the End User

The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.

Manuel d’information à l’utilisateur final

L’intégrateur OEM doit être conscient de ne pas fournir des informations à l’utilisateur final quant à la façon d’installer ou de supprimer ce module RF dans le manuel de l’utilisateur du produit final qui intègre ce module. Le manuel de l’utilisateur final doit inclure toutes les informations réglementaires requises et avertissements comme indiqué dans ce manuel.