tuya VWRK4 AVS Smart Audio Installation Guide

: June 5, 2024
: Tuya

tuya VWRK4 AVS Smart Audio Installation Guide

Product Abstract

Tuya AVS voice module VWRK4 is based on the powerful RockChip 3308 IC which integrated with 4-Core 64 bit A35 ARM Core. The Module is integrated with voice wake & noise cancellation algorithm and which can be applied in the IoT device/gateway/smart speaker. The CPU RK3308’s frequency is 1.3GHz, which can provide powerful computing ability. Also, the module is integrated with the RF chip RTL8723DS which contains WiFi Sing-band 1X1+BluetoothBR/EDR/BLE4.0 This can make it easy to connect to the Tuya IoT platform.

Features

High powerful ARM 4-Core 64 bit A35 RochChip 3308 CPU
Frequency: 1.3GHz
Work voltage: 4.2-5.5V（5V default）
Peripheral: 2Uart，7MIC，RGB666，1SPI，2I2C 2USB, GPIOs，3ADC，
Antenna: IPEX
Sampling Rate: 16K/16bit
Audio Feature
1. 4 ways mic pickup, stereo playback.
2. 6 ways mic pickup, single channel playback.
3. Audio output: stereo HPOUT and stereo LINEOUT
4. Audio AUX IN: support
Entertainment:
Approved: amazon music, audible, iHeartRadio, TuneIn
Skill: All the skills contains in Alexa. For example:

Newest arrivals, Business & finance, Connected Car,Education & Reference, Food &Drink, Game & Trivia, Health & Fitness, kids, lifestyle, local, Movies & TV, Music & Audio, News, Novelty & Humor, Productivity, Shopping, Smart Home, Sports, Travel & Transportation, Utilities,Weather.

Applications

Smart household and home appliances
Smart Device
Net Gateway Control
Voice Control Panel

Module Interfaces

Dimensions and Footprint

The Module has four rows of pins with 1mm Pin Width and 1.5mm pin spacing，the total number of pins is 82，and its dimensions is 35mm35mm3.2mm (WLH)，Figure 2-1 shows the Dimension views.

Note:
The default dimensional tolerance is ±0.35mm

Figure 2-1 Dimensions of VWRK4

The total pins is 82 and the opposite side has the same number pins, one side is 20 and the other is 21. Figure 2-2 shows the footprint views.

Figure 2-2 Footprint of VWRK4

Circuit Diagram

Table 2-1 Hardware Feature

MCU| RK3308|
---|---|---
Flash| 128 MByte
DDR| 128 MByte
Mic| 2/4 mic array
BT| BluetoothBR/EDR/BLE4.0
WIFI| IEEE 802.11b/g/n
(channel 1-14)
Power Interface| MicroUSB 5V1A
Antenna| IPEX Antenna
Audio| MIC/HPOUT/LINEOUT
LCD| LCD Interface
Interface| Reserved UART/IIC/PWM/GPIO/USB interface

Circuit Diagram of VWRK4 voice kit

Figure 2-3 Circuit Diagram of VWRK4

Pin Definition

Table 2-2 Pin Definition of VWRK4

Pin No.

| Pin Name| Pad Type|

Function

---|---|---|---
1| GND| P| Power Supply reference ground pin
2| ANT| O| The RF ANT Interface
3| GND| P| Power Supply reference ground pin
4| ADC_KEY_IN2| AI| Analog of ADC Input
5| SAR_ADC_IN3| AI| Analog of ADC Input
6| UNO_RX| I/O| Debug UART RX
7| UNO_TX| I/O| Debug UART TX
8| USB_HOST_DM| I/O| USB Data PIN for Host
9| USB_HOST_DP| I/O| USB Data PIN for Host
10| USB_OTG_ID| I/O| USB ID PIN for OTG
11| USB_OTG_DM| I/O| USB Data PIN for OTG
12| USB_OTG_DP| I/O| USB Data PIN for OTG
13| PHONE_CTRL| I/O| The General I/O Pin
14| PHONE_DET| I/O| The General I/O Pin
15| AUX_IN_CTRL| I/O| Selection of HPout or Lineout/ General I/O
16| SPK_MUTE| I/O| Speaker mute Control Pin /The General I/O Pin
17| MIC_LED| I/O| Control of Led Peripherals/ General I/O
18| GND| P| Power Supply reference ground pin
19| VCC-IO_OUT| P| Power supply pin for Peripherals
20| GND| P| Power Supply reference ground pin
21| VCC-5V| P| Power supply pin(5V)
22| VCC-5V| P| Power supply pin(5V)
23| GND| P| Power Supply reference ground pin
24| IR_RX| I/O| IR Receive Pin / General IO Pin
25| IR_TX| I/O| IR Tranmit Pin / General IO Pin
26| I2C_SDA| I/O| I2C SDA for Peripherals
27| I2C_CLK| I/O| I2C CLK for Peripherals
28| LCD_PWR| I/O| LCD Power Control Pin
29| LCD_BL| I/O| LCD Back light / General IO Pin/PWM
30| LCD_RST| I/O| LCD Reset Pin / General IO Pin
31| LCD_DEN| I/O| LCD Data Enable/ General IO Pin
32| LCD_HS| I/O| LCD Horizontal sync PIN/ General IO Pin
33| LCD_VS| I/O| LCD Vertical sync PIN/ General IO Pin
34| LCD_CLK| I/O| LCD Clk Pin / General IO Pin
35| LCD_D0| I/O| LCD Data Pin / General IO Pin
36| LCD_D1| I/O| LCD Data Pin / General IO Pin
37| LCD_D2| I/O| LCD Data Pin / General IO Pin
38| LCD_D3| I/O| LCD Data Pin / General IO Pin
39| LCD_D4| I/O| LCD Data Pin / General IO Pin
40| LCD_D5| I/O| LCD Data Pin / General IO Pin
41| LCD_D6| I/O| LCD Data Pin / General IO Pin
42| LCD_D11| I/O| LCD Data Pin / General IO Pin
43| LCD_D10| I/O| LCD Data Pin / General IO Pin
44| LCD_D8| I/O| LCD Data Pin / General IO Pin
45| LCD_D7| I/O| LCD Data Pin / General IO Pin
46| LCD_D13| I/O| LCD Data Pin / General IO Pin
47| LCD_D14| I/O| LCD Data Pin / General IO Pin
48| LCD_D9| I/O| LCD Data Pin / General IO Pin
49| LCD_D17| I/O| LCD Data Pin / General IO Pin
50| LCD_D12| I/O| LCD Data Pin / General IO Pin
51| LCD_D15| I/O| LCD Data Pin / General IO Pin
52| LCD_D16| I/O| LCD Data Pin / General IO Pin
53| LCD_SPI_RX| I/O| SPI Data Pin for LCD / General IO Pin
54| LCD_SPI_CLK| I/O| SPI CLk Pin for LCD / General IO Pin
55| LCD_SPI_CS| I/O| SPI CS Pin for LCD / General IO Pin
56| LCD_SPI_TX| I/O| SPI Data Pin for LCD / General IO Pin
57| GND| P| Power Supply reference ground pin
58| HPOUT_R| AO| Headphone output Right
59| HPOUT_L| AO| Headphone output Left
60| LINEOUT_R| O| Line output Right
61| LINEOUT_L| O| Line output Left
62| MIC2N| AI| The Audio Analog input
63| MIC2P| AI| The Audio Analog input
64| MIC3N| AI| The Audio Analog input
65| MIC3P| AI| The Audio Analog input
66| MIC4N| AI| The Audio Analog input
67| MIC4P| AI| The Audio Analog input
68| MIC5N| AI| The Audio Analog input
69| MIC5P| AI| The Audio Analog input
70| MIC6N| AI| The Audio Analog input
71| MIC6P| AI| The Audio Analog input
72| MIC7N| AI| The Audio Analog input
73| MIC7P| AI| The Audio Analog input
74| MIC8N| AI| The Audio Analog input
75| MIC8P| AI| The Audio Analog input
76| GND| P| Power Supply reference ground pin
77| AP_CTS| I/O| UART1 CTS PIN / General IO Pin
78| AP_RTS| I/O| UART1 RTS PIN / General IO Pin
79| AP_RX| I/O| UART1 RX PIN / General IO Pin
80| AP_TX| I/O| UART1 TX PIN / General IO Pin
81| RST| O| The System HardWare Reset Pin
82| ADC_KEY_IN1| AI| Analog of ADC Input

Note:

P indicates power supply pins, I/O indicates input/output pins, and AI indicates analog input pins, AO indicates analog output pins.
RST is only a hardware reset pin.
UNO_TX/RX are user-side serial interface pins，can be used for debug the system.

Electrical Parameters

Absolute Electrical Parameters

Table 3-1 Absolute Electrical Parameters

Parameter| Description| Minimum Value| Maximum Value| Unit
---|---|---|---|---
Ts| Storage Temperature| -40| 70| ℃
VCC| Power Supply Voltage| -0.3| 5.5| V
ESD (HBM)| TAMB-25℃| N/A| 2000| V
ESD (MM)| TAMB-25℃| N/A| 500| V

Electrical Conditions

Table 3-2 Normal Electrical Conditions

 **unit**

---|---|---|---|---|---
Ta| Working temperature| -20| NA| 60| ℃
VCC| Power Supply Voltage| 4.2| 5| 5.5| V
Vil| IO Low-level input| NA| NA| 0.8| V
Vih| IO high-level input| 2| NA| 3.3+0.3| V
Vol| IO Low-level output| NA| NA| 0.4| V
Voh| IO high-level output| 2.9| 3.3| –| V
Imax| IO Drive Current| –| 2| 8| mA

Working Current

Table 3-3 Power Consumption during working mode

Working Mode| Status (Ta=25℃，VCC=5V)| Typical Value| Peak Value| Unit
---|---|---|---|---
EZ| In EZ mode and wifi indicator blinks quickly| 193| 876| mA
Connected and idle| The module is connected to the network and wifi indicator is steady on| 145| 788| mA
Connected and Communicate| The module is connected to the network and the wifi is transmit data| 239| 892| mA

Note: the power consumption is tested at the supply voltage is 5V.

Transmit power

WIFI transmit power

Table 3-4 WIFI transmit Power Consumption

Wifi TX

| Parameter| Typical|

Unit

---|---|---|---

Mode

| Rate|

Transmit Power

IRF| 11b| 11Mbps| +17dBm| 267.2| mA
11g| 54Mbps| +14.5dBm| 272.0| mA
11n/HT20| MCS7| +13.5dBm| 246.0| mA
11n/HT40| MCS7| +13.5dBm| 246.0| mA

Note: working condition, VBAT=5V，VDD_ANA=1.8V,internal TOP LDO supply

WIFI Receive Power

Table 3-5 WIFI Receive Power Consumption

WIFI RX

| Parameter| Typical|

Unit

---|---|---|---
ACTIVE| 1M DSSS| 72| mA
54M OFDM| 84| mA
DEEP SLEEP| 11b| 55| mA
11g| –| mA

Note: working condition, VBAT=5V，VDD_ANA=1.8V,internal TOP LDO supply.

Bluetooth Receive Power

Table 3-7 Bluetooth Receive Power Consumption

BT TX

| Parameter|

Typical

| Unit
---|---|---|---

Mode

| Rate|

Transmit Power

IRF| BR| 1Mbps| 9dBm| 267.2| mA
EDR| 3Mbps| 8dBm| 272.0| mA
BLE| 1Mbps| +8.5dBm| 246.0| mA

Note: VBAT=5V, VDD_ANA=1.8V,internal TOP LDO supply.

RF Features

Basic RF characteristics

Parameter

|

description

---|---
Work frequency| 2.400~2.484GHz
Wi-Fi standard| IEEE802.11b/g/n20/n40(channel 1-14)
BLE standard| BRV2.0/EDR/BLEV4.0
WIFI modulation type| 802.11b: CCK, DQPSK, DBPSK
802.11g: 64-QAM,16-QAM, QPSK, BPSK
802.11n: 64-QAM,16-QAM, QPSK, BPSK
BLE modulation type| 8DPSK, π /4 DQPSK, GFSK
WIFI data transfer rate| 11b:1,2,5.5,11(Mbps)
11g:6,9,12,18,24,36,48,54(Mbps)
11n:HT20MCS0~7
11n:HT40MCS0~7
BLE data transfer rate| Basic Rate: 1 Mbps BLE: 1Mbps
Enhanced Data Rate(EDR): 2Mbps/3 Mbps
Antenna type| Support IPEX external antenna/ on board antenna connect

Output Power（TX continuous transmit power,VBAT=5V）

WIFI transmit power

Parameter

| Min| Typical| Max|

Unit

---|---|---|---|---
RF average output power, 802.11bCCKMode| 11M| –| 17| –| dBm
RF average output power, 802.11gOFDMMode| 54M| –| 14.5| –| dBm
RF average output power, 802.11n/20M Mode| MCS7| –| 13.5| –| dBm
RF average output power, 802.11n/40M Mode| MCS7| –| 13.5| –| dBm
Frequency error| -20| –| 20| ppm

BLE transmit power

Parameter

| Min| Typical| Max|

Unit

---|---|---|---|---
RF average output power, BR Mode| 1M| –| +5.5| –| dBm
RF average output power，EDR Mode| 3M| –| +5.5| –| dBm
RF average output power，BLE Mode| 1M| –| +5.5| –| dBm
Frequency error| -10| –| 10| ppm

Receive sensitivity (RX sensitivity,VBAT=5V)

WIFI Receive Sensitivity

Parameter

| Min| Typical| Max|

Unit

---|---|---|---|---
RF average output power, 802.11b Mode| 1M| | -92| –| dBm
RF average output power, 802.11bCCKMode| 11M| | -86| –| dBm
RF average output power, 802.11gOFDMMode| 54M| | -74| –| dBm
RF average output power, 802.11nOFDMMode| MCS7| | -72| –| dBm
RF average output power, 802.11n/40M Mode| MCS7| –| -72| –| dBm

BLE receive sensitivity

Symbol

| Parameter|

Unit

---|---|---
|

Mode

| Rate|

Typical

IRF| BR| DH1| -91| dBm
IRF| DH5| -91| dBm
IRF| EDR| 2Mbps| -90| dBm
IRF| 3Mbps| -84| dBm
IRF| BLE| 1Mbps| -95| dBm

Antenna Information

Antenna type

VWRK4 module uses the on board IPEX connector to connect with the external FPC antenna.

Reduce Antenna Interference

For a better performance, some suggestions to the users:

A. The distance between the module antenna and other metal parts must be at least 15mm.
B. If you use the IPEX Antenna, The Following options are some advice you should pay attention.

IPEX ANT interface

Place the IPEX interface near the outline of the board.
No shield should cover on the IPEX interface.

These suggestions are for the extend ANT interface pin used for IPEX ANT.

FPC Antenna

VWRK4 module can use an external IPEX antenna by the on board IPEX connector.

The FPC antenna is designed by Tuya cooperation，and manufacture by Dongguan UB electronic company.

The FPC Antenna is together with the VWRK4 module. if the costumer use their own new Antenna, the FCC should be tested with the new Antenna.

The following table is the main technical specifications of the FPC Antenna.

Items

|

Main technical specifications

---|---
Manufacturer| UB
Product model| UB01C07F3D1388A
Frequency Range (MHZ)| 2400~2500
Impedance(Ω)| 50
AVG Gain(dBi)| 2.13
VSWR| ≤1.92
Admitted Power| 1W
Polarization| Line
Connector Type| RF Cable+Terminal
Antenna Base| FPC
Operating Temp| -20℃~+70℃
Storage Temp| -20℃~+70℃

The Figure 5-5 is the Picture of the FPC antenna. All the features of the FPC antenna can be reviewed from the “The Specification of the FPC antenna”.

Figure 5-5 The FPC Antenna

Packaging Information

Mechanical Dimensions

The following is the mechanical dimensions of the VWRK4 module, the width and the length are 35mm*35mm.

_ **Figure 6-1 VWRK4 mechanical dimensions of top side

Figure 6-1 VWRK4 mechanical dimensions of bottom side**_

Note: The Pads beyond the dimensions are cutted and half left，if you want to design the package of the VWRK4, be careful of the pad dimensions.

Product instructions

Appendix: Statement

Federal Communications Commission (FCC) Declaration of Conformity

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

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

This device may not cause harmful interference, and
This device must accept any interference received, including interference that may cause undesired operation.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with 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 equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment 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 equipment and receiver.
Connect the equipment 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 equipment complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

Important Note

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

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 to 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/warning 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 have got a FCC ID: 2ANDL-VWRK4.The final end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID:2ANDL-VWRK4”

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 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.

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 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 to the human body.