reComputer R1000
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#max-load-15= 12
realtime= yes
priority= 1
You can adjust other settings as needed.
3. Ensure the watchdog service is running:
sudo systemctl start watchdog
4. To test the watchdog functionality, execute the following command to simulate a system hang:
sudo su
echo 1 > /proc/sys/kernel/sysrq
echo "c" > /proc/sysrq-trigger
This command triggers a kernel crash and should cause the watchdog to reboot the system.
5. Monitor the system to confirm that it reboots after the specified timeout period.
These steps will help you test and ensure the functionality of the watchdog timer on your system.
3.15 Buzzer
This script turns off the buzzer, and then turns on the buzzer using LED brightness.
1. Turn off the buzzer using LED brightness
# Turn off the buzzer using LED brightness
raspi-gpio set 21 op dl
2. Turn on the buzzer using LED brightness
# Turn on the buzzer using LED brightness
raspi-gpio set 21 op dh
3.16 Speaker
To play MP3 files on your system, you can use the sox package. Here's how to install it:
1. Install sox:
2. Additionally, you can install support for various audio formats, including MP3, by installing the libsox-fmt-
all package:
sudo apt-get install libsox-fmt-all
Once installed, you can play MP3 files using sox. Here's the basic command to play an MP3 file named example.mp3:
This command will play the MP3 file through your system's default audio output.
If you want to play a specific MP3 file with sox, replace example.mp3 with the path to your desired MP3 file.
3.17 TPM 2.0
If you connect TPM 2.0 module to device, the following code can help check TPM connection.
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