Getting into the board
After Ubuntu boots on the IQ-9075, use the serial console for first access, change the image's temporary credentials, configure networking, and verify key-based SSH before application deployment.
Connecting to board through UART Shell (serial console)
To set up the debug UART connection and view the diagnostic messages, connect the debug USB cable from the debug USB port on the Qualcomm® Dragonwing™ IQ-9075 EVK device to the Linux host.
Install minicom on host:
sudo apt update sudo apt install minicom
Check the USB port:
ls /dev/ttyUSB*
Connect to board
sudo minicom -D /dev/ttyUSB1 -b 115200
Then sign in to the console with the following credentials:
login: root password: oelinux123
Connecting to network
The board has an Ethernet port that can be connected to router to have internet access. Wi-Fi is operational in Station mode. The Wi-Fi host driver and the authentication for network management are initialized during the device boot up. Connect to router:
WIFI_SSID=your_wifi_ssid PASSWORD=your_wifi_password
nmcli dev wifi connect $WIFI_SSID password $PASSWORD
If something goes wrong, try deleting the connection with:
nmcli connection delete $WIFI_SSID
And retry. Check status:
nmcli -p device
Check WLAN connection status and IP address:
ip address show wlp1s0
Check connection by pinging a website:
ping google.com
Connecting through SSH
Establish the network connectivity before connecting via SSH. Locate the IP address of the device according to the type of network connection, using the UART console on the Linux host:
- For Ethernet:
ip address show eth2
- For WiFi:
ip address show wlp1s0
Then use the IP address from the Linux host to establish an SSH connection to the device:
ssh root@ip-address
FAQ
- What are the default Ubuntu credentials on the IQ-9075 image?
- They are image-specific and may be temporary. Consult the release note for each specific image version. For the image version used in this guide the temporary credentials are login: root, password: oelinux123. Ensure to change the temporary credentials to prevent security issues.
- How should Wi-Fi credentials be entered?
- Use nmcli to set the SSID and password for the Wi-Fi connection.
Related pages
- Qualcomm Dragonwing Technical Guide/Bring Up/Ubuntu/Flashing Image
- Qualcomm Dragonwing Technical Guide/GStreamer/Enable Support
- Qualcomm Dragonwing Technical Guide/GStreamer/Example Pipelines
- Qualcomm Dragonwing Technical Guide/Multimedia Support/Acceleration/GPU Enabling and Usage
References