From cb42f5cf152641565916e27173fbe020e0f0eb28 Mon Sep 17 00:00:00 2001
From: Martin Fischer <martin@push-f.com>
Date: Sat, 21 Dec 2024 15:12:54 +0100
Subject: ev: add zigbee2mqtt and mosquitto

---
 nixos/hosts/ev/default.nix         |  5 +++++
 nixos/hosts/ev/home-automation.nix | 41 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 nixos/hosts/ev/home-automation.nix

diff --git a/nixos/hosts/ev/default.nix b/nixos/hosts/ev/default.nix
index ec2ed86..3bdde6d 100644
--- a/nixos/hosts/ev/default.nix
+++ b/nixos/hosts/ev/default.nix
@@ -11,8 +11,13 @@
     <top/profiles/server>
     <top/shared/tailscale.nix>
     <top/shared/basics-physical.nix>
+    ./home-automation.nix
   ];
 
+  home-automation.zigbee2mqttPort = 8080;
+
+  home-automation.zigbeeSerialPort = "/dev/serial/by-id/usb-ITead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_e2fed465c59ded11962fd7a5a7669f5d-if00-port0";
+
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
 
diff --git a/nixos/hosts/ev/home-automation.nix b/nixos/hosts/ev/home-automation.nix
new file mode 100644
index 0000000..0766e4e
--- /dev/null
+++ b/nixos/hosts/ev/home-automation.nix
@@ -0,0 +1,41 @@
+# I'm not using Home Assistant because many of its integrations can only be configured via the UI.
+# (see https://github.com/home-assistant/architecture/blob/master/adr/0010-integration-configuration.md)
+
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.home-automation;
+in
+{
+  options.home-automation = {
+    zigbee2mqttPort = lib.mkOption {
+      type = lib.types.int;
+    };
+    zigbeeSerialPort = lib.mkOption {
+      type = lib.types.str;
+    };
+  };
+
+  config = {
+    services = {
+      zigbee2mqtt = {
+        enable = true;
+        settings = {
+          serial = {
+            port = cfg.zigbeeSerialPort;
+          };
+          frontend = {
+            port = cfg.zigbee2mqttPort;
+          };
+        };
+      };
+
+      mosquitto = {
+        enable = true;
+      };
+
+      # TODO: somehow record a history of events (perhaps in Grafana?)
+      # TODO: somehow set up some automations
+    };
+  };
+}
-- 
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