Raspberry Pi uses SD card for its main storage and you may run out of the free space as your project goes on. Here are some tips to free up your SD card space. 1. Uninstall unnecessary packages Wolfram Engine: I’ve never used but it seems that Wolfram Engine is for mathematical/physics programming. If… Continue reading “Free up SD card space on Raspberry Pi”
Update (Sep. 7th, 2017): If you are using Raspbian Stretch, the pre-installed version is now v1.1.3 and this issue doesn’t occur any more! Update (Dec. 9th, 2018): If you are looking for steps to update ALSA on Raspbian Strech, please see this post. If you find hundreds of files like below after the recording… Continue reading “arecord creates hundreds of files”
The purpose of this post is to record audio (e.g. voice) on Raspberry Pi with a microphone. Raspberry Pi doesn’t have mic input by default, so USB microphone or USB soundcard + 3.5 mm jack mic is required. Example Setup Raspberry Pi (e.g. Raspberry Pi 3 B+/Raspberry Pi 4B) Microphone (e.g. SunFounder USB… Continue reading “Voice Recording on Raspberry Pi”
Update (Sep 7, 2017): If you are using Raspbian Stretch, please refer here instead of steps below. This post below is for Raspbian Jessie. The purpose of this post is to enable Bluetooth Handsfree Profile (HFP) on Raspberry Pi so that Raspberry Pi can act like as a handsfree speaker phone or a handsfree car… Continue reading “HFP on Raspberry Pi”
By default, the keyboard layout is set for UK on Raspbian OS. So, if your keyboard is not UK layout, you may want to change it. Here is the steps. 1. Launch Terminal if you are on graphical desktop mode. 2. Open “/etc/default/keyboard” with nano (or any other editor you prefer). sudo nano /etc/default/keyboard The… Continue reading “Changing Keyboard Layout on Raspberry Pi”
