Controlling Display Backlight on Raspberry Pi

This is how to turn on and off backlight on Raspberry Pi for the official 7-inch touchscreen display and HDMI displays using command-line interface (CLI). I checked it with¬†Raspberry Pi 3¬†running Raspbian Stretch (September 2017 version) + official 7″ display / GeChic 1002 10.1″ HDMI Display.   The official 7-inch touchscreen display [1] OFF:

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Silent boot on Raspbian Stretch

The purpose of the steps here is to remove 1 – 4 below from showing up at Raspberry Pi boot up process. After following the steps, the first thing you see will be Raspbian desktop (PIXEL). I tested it with Raspberry Pi 3 running Raspbian Stretch Desktop (September 2017 version). 1) Rainbow image 2) Raspberry… Continue reading “Silent boot on Raspbian Stretch”

Disabling IPv6 Kernel Module on Raspbian Stretch

I’m using Raspbian Stretch Lite (September 2017 version) and for some reason, wanted to disable IPv6 kernel module, which is loaded by default. Basically, it can be done by blacklisting the kernel module. [1] Here is steps I took.   1. Check already loaded modules (Optional) You can check already loaded modules by ‘lsmod’ command.… Continue reading “Disabling IPv6 Kernel Module on Raspbian Stretch”

Running BLE GATT Server Example on Raspbian Stretch

The purpose of this post is to run an example code of Bluetooth Low Energy GATT server from BlueZ source code on Raspberry Pi. Here are the contents of this post. Contents – Assumptions – Steps 1. Download Example Code 2. Execute Example Code 3. Install Requisite 4. Start Advertising BLE 5. Verify – Reference… Continue reading “Running BLE GATT Server Example on Raspbian Stretch”

Running BLE Advertising Example Code on Raspbian Stretch

Update (Feb 26, 2018): If your BlueZ version is 5.48 or higher, you can skip Step 1 since the Advertising Manager is marked as stable In BlueZ 5.48. (To update BlueZ, please see this post. )   The purpose of this post is to run an example code of Bluetooth Low Energy Advertisement from BlueZ… Continue reading “Running BLE Advertising Example Code on Raspbian Stretch”