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SeeedStudio ReSpeaker Core v2 Manual

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ReSpeaker Core v2
Seeed ReSpeaker Core v2 is designed for voice interactive applications. It is based on quad-core ARM Cortex-A7, up to 1.5Ghz, and 1GB RAM on-board. Besides,
it features six microphone array w ith necessary speech algorithm, like DoA(Direction of arrival), BF(Beam-Forming), AEC(Acoustic echo cancellation) and etc.
ReSpeaker Core v2 runs GNU/Linux operation system. It benefits from pow erful and active community, w e can use lot of existing softw are/tools for development,
testing and deploy, so that rapid product development become available.
ReSpeaker Core v2 is not only designed for makers/enthusiast, but also a turnkey solution for business company. The hardw are consists of tw o parts, one is the
minimized SoC module w hich is small and easy for manufacturing and ready for final product, the other is a bottom board w hich can be full customizable.
Features
High performance SoC
1GB RAM & 4GB eMMC
6 Microphone Array
USB OTG, USB device
WiFi b/g/n and BLE 4.0
Detect range: ~5 meters
Grove socket for other sensor
3.5mm audio jack & JST2.0 connector
8 channel ADCs for 6 microphone array and 2 loopback (hardw are loopback)

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  • Page 1 ReSpeaker Core v2 is not only designed for makers/enthusiast, but also a turnkey solution for business company. The hardw are consists of tw o parts, one is the minimized SoC module w hich is small and easy for manufacturing and ready for final product, the other is a bottom board w hich can be full customizable.

  • Page 2: Specification

    Debian-based Linux system SDK for speech algorithm w ith Full documents C++ SDK and Python w rapper Speech algorithms and features Keyw ord w ake-up BF(Beam-Forming) DoA (Direction of arrival) NS(Noise suppression) AEC (Acoustic echo cancellation) and AGC (Automatic gain control) Specification Features Quad-Core Cortex-A7,up to 1.5GHz...
  • Page 3 Embedded Multi Media Card. You can burn the image into eMMC, so that the ReSpeaker Core v2 can boot from the eMMC. ⑨ USB Host: You can plug USB device, such as USB mouse,USB keyboard and USB flash disk into ReSpeaker Core v2 via those tw o USB hosts. Ⓐ Ethernet:...
  • Page 4 Ⓑ HDMI: Output video. Ⓒ Bluetooth and WIFI Antenna: The onboard Antenna is for WIFI and Bluetooth. Also w e provide a interface for 2.4G Antenna or PCB Antenna. Ⓓ Grove Socket: Grove Socket for digital or I2C. Pin Out Pin index definition for headers :: 8 pins header Grove Socket...
  • Page 5 Applications Smart speaker Intelligent voice assistant systems...

  • Page 6: Getting Started

    Image Installation Similar to the Raspberry Pi, you need to install the ReSpeaker Core v2 image from an SD card to get up and running. We offer tw o w ays to boot the Respeaker core v2. You can either boot from the SD card or [boot from the eMMC](/boot from the eMMC).

  • Page 7: Serial Console

    You can also check the image version w ith this command: cat /etc/issue.net. Serial Console Now your ReSpeaker Core V2 can boot, you might w ant to get access to the Linux system via a console, to setup the WiFi, etc. You have tw o w ays to get the console: A.
  • Page 8 Step 2. Use the follow ing Serial debugging tools w ith 115200 baud: Window s: use PUTTY, select protocol, fill in the correct COM port of ReSpeaker Core V2, 115200 baud, 8Bits, Parity None, Stop Bits 1, Flow Serial Control None.
  • Page 9 on the Uart port of the Respeaker. Connect the Tx pin on the Arduino to the Tx pin on the Uart port of the Respeaker. And lastly, connect the Arduino to your PC/Mac via the Arduino's USB cable. Now check that your Mac or Linux PC finds your Arduino by typing this command: ls /dev/cu.usb* (Mac) ls /dev/ttyACM* (Linux) You should get back something like:...
  • Page 10 Now find the IP address of your ReSpeaker by using the command below . ip address In the example below , w e can see that this ReSpeaker's IP address is 192.168.7.108 root@v2:/home/respeaker# ip address 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever...

  • Page 11: Record And Play

    VNC View er VNC View er for Google Chrome to connect to the desktop of ReSpeaker Core v2. T o use VNC, connect your PC/Mac and ReSpeaker v2 to the same Wi-Fi netw ork. Then open VNC View er, type at the address bar.
  • Page 12 So far w e learned the basic operations of the ReSpeaker Core v2 board, let's move forw ard. We can use ReSpeaker Core v2 to build our ow n AVS(Alexa Voice Service) device or Dueros(Voice assistance of Baidu) device.
  • Page 13 After succeed you w ill see: Now you can close the VNC client. The follow ing commands can be executed in the SSH (If you prefer the VNC desktop, the terminal in VNC desktop also w orks). Step 3. Have fun with Alexa Applications We provide three python files based on Alexa, you can choose them freely.
  • Page 14 When you run the python program, you can say Alexa to w ake up the Baidu voice assistance. GPIO This part w ill introduce how to use MRAA and UPM to control GPIO and Grove Socket on Respeaker Core v2. Step 1. Update M RAA and UPM libraries to latest version First, w e need to check the kernel version of the system w e're running, if you're not sure that you flashed the system image of version 20171128 and later.
  • Page 15 Get ONE Now Connect the Grove PIR sensor's SIG pin to the ReSpeaker Core v2's header pin 0 w ith jumper. Don't forget to w ire the VCC and GND at the same time. Then tap the code below into your console respeaker@v2:~$ python Python 2.7.13 (default, Jan 19 2017, 14:48:08)
  • Page 16 In this example, w e're gonna to listen on the trigger of the Grove PIR sensor, in Python code. Connect the Grove PIR sensor's D1 pin to the ReSpeaker Core v2's header pin 0 w ith jumper. Don't forget to w ire the VCC and GND at the same time.
  • Page 17 Please plug the PIR Motion Sensor into your Respeaker Core v2 via the Grove socket. Then copy the code below into a new file and save it as a python file, name as tsl2561.py. Copy this file into your ReSpeaker Core v2.
  • Page 18 Q2: If I do not have suitable cable to access the Serial Console how can I get into ReSpeaker Core v2? A2: You can use tw o w ires cable to pow er the ReSpeaker Core v2. When the system is running, the Respeaker Core v2 can act as an AP . You can use your computer to access this AP .
  • Page 19 Step 3. When you get into the Serial Console， you can setup the WiFi Q3: How to adjust the volume? A3: You can use Alsamixer to adjust the playback volume and capture sensitivity. Step 1. T ap the follow ing code to open Alsamixer: Alsamixer Step 2.

  • Page 20: Tech Support

    Or submit the issue into our forum. Resources [PDF] Dow nload PDF of This Wiki [PDF] Rockchip RK3229 Datasheet V1.1 [PDF] Dimensions for Board [SKP] 3d Models For ReSpeaker Core v2 [MoreReading] Mraa Python documents page [MoreReading] Intel Mraa SDK...

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