Microphone Array and Speaker

Posted Posted in DIY

Respeaker 2-Mics Pi HAT + Raspberry Pi Zero W It is constantly reported that Respeaker Pi HAT does not work well with the new Raspbian OS. For example, when I tried to install the driver even with the –compat-kernel option, the system either cannot detect the sound card or has no sound from the Respeaker […]

Private Home Phone

Posted Posted in DIY

Nowadays most people use mobile phones and might not have a landline at home. However, sometimes it is convenient to call a home landline, e.g., to call domestic helper who does not have a mobile phone plan. An option is to purchase a landline from a provider and get a proper local landline phone number. […]

Remote Access from Outside of Home Network

Posted Posted in DIY

When we need to access home devices that are behind a router, we encounter at least two problems: The first problem can be solved by using a free DDNS (dynamic DSN) service, while the second one by a free and open-source VPN (virtual private network) system. DDNS In most cases, the public IP address assigned […]

Home Assistant on Raspberry Pi

Posted Posted in DIY

Home Assistant is an open-source home automation platform that allows users to locally control network-attached devices (sensors, smart appliances, etc). The platform runs in a local device and does not require a cloud to operate, and thus is able to protect users’ privacy. Installation for Debian 10 Home Assistant can be installed to a device […]

Install and Backup OS on Raspberry Pi 4B

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Preparation For software, we prepare the Windows system with the Raspberry Pi Imager that is used to write a Debian image to the microSD card. Download the .exe installation file from Raspberry Pi Imager, double-click it, and follow the instruction to complete the installation of Raspberry Pi Imager. Raspberry Pi OS This is a Debian […]