UCM-iMX8M-Mini: Yocto Linux: How-To Guide
Wi-Fi
UCM-iMX8M-Mini features certified 802.11ac Wi-Fi interface (Broadcom BCM43353 chipset). Before working with Wi-Fi, please, ensure that Wi-Fi antenna is connected.
For hardware setup and Wi-Fi antenna connection instructions please refer to evaluation kit hardware guide.
To start using Wi-Fi insert your network credentials into the following file:
/etc/wpa_supplicant.conf
Insert the network name into ssid field, password into psk field and key into the key_mgmt field (if your network uses key management).
The file should have the following content:
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
network={
ssid="<the name of your internet acces point>"
key_mgmt=WPA-PSK
psk="<the password of your internet access point>"
}
Execute the following commands to connect to the network.
$wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf -D nl80211 $udhcpc -i wlan0
Video Playback
UCM-iMX8M-Mini features 1080p60 H.264, VP8 video decoding capabilities. Before starting video playback, please, ensure that the display is connected to board.
For hardware setup and display connection instructions please refer to evaluation kit hardware guide.
The following command should be used to start video playback:
gst-launch-1.0 -v filesrc location=1.mov ! h264parse ! avdec_h264 ! autovideosink
Where 1.mov is name and extension of the video file.
Video Capturing
UCM-iMX8M-Mini features 1080p60 H.264, VP8 video encoding. Before starting video capturing, please, ensure that camera is connected to PCB.
For hardware setup and camera connection instructions please refer to evaluation kit hardware guide.
The following command should be used to start video capturing:
gst-launch-1.0 -v v4l2src ! vpuenc_h264 ! filesink location=1.mov
Where 1.mov is name and extension of the file.
Suspend / Resume
UCM-iMX8M-Mini features suspend mode, which allows to minimize power consumption.
The following command should be used to enter suspend mode:
echo mem >/sys/power/state
To resume normal operation press the Power On button SW5.
