Datasheet

ssh respeaker@192.168.***.***
// password: respeaker
Note
Note that if experience slow performance using SSH, please sw itch to a less crow ded WiFi netw ork.
B. VNC
In order to acquire the authorization from Alexa, you need to use VNC View er. The system has VNC server built-in. The VNC server w ill launch the lxqt desktop
GUI w hich is a lightw eight Qt desktop environment.
The VNC service also starts automatically. Use VNC View er or VNC View er f or Google Chrome to connect to the desktop of ReSpeaker Core v2.
To use VNC, connect your PC/Mac and ReSpeaker v2 to the same Wi-Fi netw ork. Then open VNC View er, type 192.168.xxx.xxx at the address bar.
192.168.xxx.xxx is IP address of the board，you can use the command ifconfig to check. If you meet Unencrypted connection , click Continue to go on. The
passw ord is respeaker .
Note!!!
Please note that the VNC connection relies on good quality of the netw ork, please have a mental preparation that you w ill probably get very low refresh rate
of the VNC display.
Connect to Speaker or Headset
The board uses the built-in codec of the SOC to render playback. Both the JST speaker port and the headset port are driven by their ow n amplifier, and both
amplifiers are connected to the same codec of the SOC. The sound card driver that SEEED implemented drives both the capture device and the playback device.
So there's no discrete capture or playback sound card in ALSA device list. They're all named seeed-8mic-voicecard.
The simplest w ay to heard sound from the board is to plugin a headset. If you prefer loud speaker, the board can output up to 8W of drive capability.
Record and Play
1.Test via ALSA
As this is a technical documentation of development phase, the index of the sound device may change along versions. So check out the correct device index f irst
w ith the follow ing commands:
respeaker@v2:~$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: seeed8micvoicec [seeed-8mic-voicecard], device 0: 100b0000.i2s1-ac108-pcm0 ac108-pcm0-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: bluetoothvoice [bluetooth-voice], device 0: 100e0000.i2s2-bt-sco-pcm bt-sco-pcm-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
respeaker@v2:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: seeed8micvoicec [seeed-8mic-voicecard], device 1: 100b0000.i2s1-rk3228-hifi rk3228-hifi-1 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: bluetoothvoice [bluetooth-voice], device 0: 100e0000.i2s2-bt-sco-pcm bt-sco-pcm-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
Find the sound card w hose name has seeed prefix. For the example above, the capture device is hw:0,0, the playback device is hw :0,1. Then test recording and
playing sound w ith the follow ing commands:
# record & playback 2 channels audio