Q: I can’t connect Raspberry Pi through VNC viewer with Ethernet connection.
A: It may caused by many reasons. You can follow the checklist below to figure it out step by step.
- Flash your micro SD card with the latest C-STEMbian.
- Plugin the micro SD card into the Pi before power it.
- Install Bonjour on your computer. (Please refer this question if you don’t know how to install)
- Please refer the Apple’s article to make sure Bonjour has been successfully installed on your computer.
- Make sure Bonjour service is enabled on your computer. If you don’t know how to check it, please refer the question.
- Connect the Pi to your computer with an Ethernet cable.
- Try different Ethernet cables.
- Try different USB to Ethernet converters if you are using one.
- If all of them listed above are checked, you can try to reboot your computer and the Raspberry Pi.
- Contact us for support through this page.
Q: How to install Bonjour on my computer?
A: Windows users can download and install Bonjour Print Services v2.0.2. Bonjour should be installed on Mac by default.
Q: How to make sure Bonjour service is enabled on my computer? If not, how can I start it?
A:
- Press the Windows key + “R” to open the “Run” dialog. Type “compmgmt.msc” without quotes in the Run dialog box, and press “OK” to open the Computer Management window.
- Click the arrow next to “Services and Applications” in the left pane to expand it, and then select “Services.”
- Click the “Name” column header in the middle pane to sort the services alphabetically. Right-click “Bonjour Service” and choose “Start.” Wait approximately five seconds for the service to start.
- Right-click “Bonjour Service” again, and select “Properties.” On the General tab, choose “Automatic (Delayed Start)” from the drop-down list next to “Startup type” and click “OK.” Close the Computer Management window.
Q: I cannot launch Linkbot Labs from C-STEM Studio in Raspberry Pi.
A: In the current version of Linkbot Labs for Raspberry Pi, you will need to connect to the internet in order to launch Linkbot Labs.
Q: In C-STEM Studio, when I click “Web-Based Computing,” it displays that “This site can’t be reached, 127.0.0.1 refused to connect.” How can I fix this?
A: By default, the Apache web server in C-STEMbian is not started. You can start, stop, reload and restart it by the commands below.
- start it with: sudo /etc/init.d/apache2 start
- stop it: sudo /etc/init.d/apache2 stop
- reload the config with: sudo /etc/init.d/apache2 reload
- restart (stop followed by start): sudo /etc/init.d/apache2 restart
Q: If I do not use Linkbot lab, how can I disable the service for Linkbot lab to save CPU time?
A: baromeshd is an auto-start service during start-up. You can use the command ‘sudo systemctl stop baromeshd.service’ to temporary stop it and the command ‘sudo systemctl disable baromeshd.service’ to permanently stop it from auto starting.
Q: Linkbot Labs is open but it says I am in Offline Mode even though I am connected to the internet.
A: You may need to restart the baromeshd service. You can use the command ‘sudo service baromeshd start’
Q: When I run a program in ChIDE I get the error message “Unable to open I2C device: No such file or directory”
A: You need to enable automatic loading of the I2C kernel module by following the below steps
- Open the Applications Menu
- Click “Preferences”
- Click “Raspberry Pi Configuration”
- Click “Interfaces”
- Enable I2C
Q: My screen is too big or flickering.
A: You may need to adjust the resolution.
- Open the Applications Menu (in top right corner of screen)
- Click “Preferences”
- Click “Raspberry Pi Configuration”
- Click “Set Resolution…”
- Choose an appropriate resolution for your monitor. (for example: CEA mode 16 1920×1080 60Hz 16:9)
- It will ask you to reboot. Click Yes.
Q: The keyboard is not typing properly.
A: You may need to adjust the keyboard settings.
- Open the Applications Menu (in top right corner of screen)
- Click “Preferences”
- Click “Mouse and Keyboard Settings”
- Click “Keyboard”
- Click “Keyboard Layout”
- Click “United States”
- Select “English (US)”
Q: The monitor is not responding when I connect my Raspberry Pi.
A: You may need to adjust the settings on your monitor. Using the buttons on the monitor, you can change the input source to connect the monitor to the Raspberry Pi.