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Category Archives: Raspberry PI

HDMI on Raspberry PI not working unless monitor connected before booting

Software Effect Enterprises, Inc Posted on April 7, 2021 by SEEIApril 7, 2021

The HDMI output of the Raspberry Pi is only activated if a monitor or television is connected and powered up before the Raspberry Pi is turned on. To correct this – edit the /boot/config.txt file Add the following two lines … Continue reading →

Posted in Raspberry PI | Tagged hdmi, pi, raspberry

CPU and GPU Temperature of a Raspberry PI via CLI, SNMP and Cacti

Software Effect Enterprises, Inc Posted on July 16, 2018 by SEEIMay 26, 2019

The following is a primer for setting up your Raspberry PI to use SNMP to monitor the CPU and the GPU temperature in Cacti. The instructions below cover both Raspian and Centos 7. I am assuming you are familiar with … Continue reading →

Posted in Raspberry PI, SNMP

VCHI initialization failed Raspberry Pi

Software Effect Enterprises, Inc Posted on September 6, 2018 by SEEISeptember 6, 2018

I used vcgencmd inside a script for SNMP and the SNMP query returned: VCHI initialization failed I soon discovered if vcgencmd on a raspberry pi you get VCHI initialization failed then you need to add the video group to that user. … Continue reading →

Posted in Raspberry PI

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