How to Install FHEM on NixOS Latest

FHEM (stands for "Fast Home Easy Monitoring") is an open-source home automation software, which allows users to set up various smart devices in their homes to control temperature, lighting, and other functionalities. In this tutorial, we will guide you through the process of installing FHEM on NixOS latest.

Prerequisites

Before we begin the installation process, ensure that your NixOS latest system is up to date.

Step 1: Adding FHEM to Nixpkgs repository

The first step involves adding FHEM to Nixpkgs repository as follows:

$ sudo nano /etc/nixos/configuration.nix

Under systemPackages, add the following line:

{ 
  [...]
  environment.systemPackages = with pkgs; [
    [...]
    fhem
  ];
}

Save and exit the configuration file using Ctrl + X, then Y, followed by Enter.

Step 2: Enabling the FHEM HTTP server

FHEM runs an HTTP server that provides a web interface for controlling smart devices. To enable the FHEM HTTP server, add the following line to your NixOS configuration file:

{
  [...]
  services.fhem = {
    enable = true;
  };
}

Save and exit the configuration file using Ctrl + X, then Y, followed by Enter.

Step 3: Starting the FHEM service

Reload the NixOS configuration by running the following command:

$ sudo nixos-rebuild switch

After the rebuild process is complete, start the FHEM service by executing the following command:

$ sudo systemctl start fhem

Check the status of the FHEM service to ensure that it is running correctly:

$ sudo systemctl status fhem

Step 4: Accessing the FHEM web interface

The FHEM web interface is accessed via a web browser. The default URL is http://<hostname or IP address of your NixOS system>:8083/fhem. You should see the FHEM dashboard, which displays the connected devices, logs, and other information.

Conclusion

In this tutorial, you learned how to install FHEM on NixOS latest. You can now use FHEM to monitor and control various smart devices in your home via the web interface.