manatee: Add bluetooth reset handling

hosts/manatee/modules/home-assistant/default.nix

@@ -6,6 +6,60 @@
 }:
 let
   nginxEnabled = config.mod.nginx.enable;
+
+  script = pkgs.writeShellScript "bt-reset" ''
+    set -euo pipefail
+    export PATH="${
+      lib.makeBinPath [
+        pkgs.bluez
+        pkgs.util-linux
+        pkgs.kmod
+        pkgs.gnugrep
+        pkgs.coreutils
+      ]
+    }"
+
+    logger -t bt-reset "Starting Bluetooth adapter reset..."
+
+    # Exit early if the adapter is already present and running
+    if hciconfig hci0 2>/dev/null | grep -q "UP RUNNING"; then
+      logger -t bt-reset "hci0 is already UP RUNNING — nothing to do"
+      exit 0
+    fi
+
+    # If hci0 exists but isn't UP, try bringing it up
+    if hciconfig hci0 2>/dev/null; then
+      logger -t bt-reset "hci0 exists but not running — bringing it up"
+      hciconfig hci0 up || true
+      sleep 2
+
+      if hciconfig hci0 2>/dev/null | grep -q "UP RUNNING"; then
+        logger -t bt-reset "hci0 is UP now"
+        systemctl restart bluetooth.service
+        logger -t bt-reset "bluetooth.service restarted — done"
+        exit 0
+      fi
+    fi
+
+    # Hard reset: reload the btusb kernel module (works for USB adapters)
+    logger -t bt-reset "hci0 missing — reloading btusb module..."
+    modprobe -r btusb 2>/dev/null || true
+    sleep 3
+    modprobe btusb
+    sleep 3
+
+    if hciconfig hci0 2>/dev/null; then
+      hciconfig hci0 up
+      logger -t bt-reset "hci0 restored after module reload"
+    else
+      logger -t bt-reset "ERROR: hci0 not found after module reload"
+      exit 1
+    fi
+
+    # Restart the bluetooth systemd service so bluetoothd picks up the adapter
+    systemctl restart bluetooth.service
+    logger -t bt-reset "bluetooth.service restarted — done"
+  '';
 in
 {
   hardware.bluetooth.enable = true;
@@ -57,71 +111,111 @@ in
         };
       };
     };
+
+    # Trigger reset via udev when hci0 disappears
+    udev.extraRules = ''
+      ACTION=="remove", SUBSYSTEM=="bluetooth", KERNEL=="hci0", \
+        TAG+="systemd", ENV{SYSTEMD_WANTS}+="bt-reset.service"
+    '';
   };
 
-  systemd.user = {
+  systemd = {
-    timers = {
+    services = {
-      "update-hetzner-ha-dns" = {
+      # Trigger reset on bluetoothd failure
-        unitConfig = {
+      bluetooth = {
-          Description = "updates Hetzner DNS for home-assistant";
+        unitConfig.OnFailure = [ "bt-reset.service" ];
-        };
+      };
 
-        timerConfig = {
+      bt-reset = {
-          Unit = "update-hetzner-ha-dns.service";
+        description = "Reset Bluetooth adapter";
-          OnCalendar = "*-*-* *:00/30:00";
+        after = [ "bluetooth.service" ];
-          Persistent = true;
-        };
 
-        wantedBy = [ "timers.target" ];
+        serviceConfig = {
+          Type = "oneshot";
+          ExecStart = script;
+
+          Restart = "on-failure";
+          RestartSec = "10s";
+          StartLimitIntervalSec = "120";
+          StartLimitBurst = 3;
+        };
       };
     };
 
-    services = {
+    timers.bt-reset = {
-      "update-hetzner-ha-dns" = {
+      description = "Periodically reset Bluetooth adapter";
-        unitConfig = {
+      wantedBy = [ "timers.target" ];
-          Description = "updates Hetzner DNS for home-assistant";
+      timerConfig = {
+        OnBootSec = "5min"; # first run 5 min after boot
+        OnUnitActiveSec = "4h"; # then every 4 hours
+        RandomizedDelaySec = "5min";
+      };
+    };
+
+    user = {
+      timers = {
+        "update-hetzner-ha-dns" = {
+          unitConfig = {
+            Description = "updates Hetzner DNS for home-assistant";
+          };
+
+          timerConfig = {
+            Unit = "update-hetzner-ha-dns.service";
+            OnCalendar = "*-*-* *:00/30:00";
+            Persistent = true;
+          };
+
+          wantedBy = [ "timers.target" ];
         };
+      };
 
-        serviceConfig = {
+      services = {
-          Type = "exec";
+        "update-hetzner-ha-dns" = {
-          EnvironmentFile = config.age.secrets.hetzner-dns.path;
+          unitConfig = {
+            Description = "updates Hetzner DNS for home-assistant";
+          };
+
+          serviceConfig = {
+            Type = "exec";
+            EnvironmentFile = config.age.secrets.hetzner-dns.path;
+          };
+
+          path = [
+            pkgs.curl
+            pkgs.coreutils # For `cat`
+            pkgs.jq
+          ];
+
+          script = ''
+            LAST_IP_FILE="/tmp/hetzner-dns-ha-ip"
+            INTERFACE="enp3s0"
+
+            CURRENT_IP=$(curl -s --fail --interface "$INTERFACE" ifconfig.me)
+
+            LAST_IP=""
+            if [[ -f "$LAST_IP_FILE" ]]; then
+                LAST_IP=$(cat "$LAST_IP_FILE")
+            fi
+
+            if [[ "$CURRENT_IP" == "$LAST_IP" ]]; then
+                echo "IP unchanged, NOOP update."
+                exit 0
+            else
+                echo "Updating IP"
+
+                JSON_BODY=$(jq -n --arg ip "$CURRENT_IP" '{records: [{value: $ip}]}')
+
+                curl \
+                  --fail \
+                	-X POST \
+                  -H "Authorization: Bearer $HETZNER_API_TOKEN" \
+                  -H "Content-Type: application/json" \
+                  -d "$JSON_BODY" \
+                  "https://api.hetzner.cloud/v1/zones/ppp.pm/rrsets/ha/A/actions/set_records" \
+                  && echo $CURRENT_IP > $LAST_IP_FILE
+            fi
+          '';
         };
-
-        path = [
-          pkgs.curl
-          pkgs.coreutils # For `cat`
-          pkgs.jq
-        ];
-
-        script = ''
-          LAST_IP_FILE="/tmp/hetzner-dns-ha-ip"
-          INTERFACE="enp3s0"
-
-          CURRENT_IP=$(curl -s --fail --interface "$INTERFACE" ifconfig.me)
-
-          LAST_IP=""
-          if [[ -f "$LAST_IP_FILE" ]]; then
-              LAST_IP=$(cat "$LAST_IP_FILE")
-          fi
-
-          if [[ "$CURRENT_IP" == "$LAST_IP" ]]; then
-              echo "IP unchanged, NOOP update."
-              exit 0
-          else
-              echo "Updating IP"
-
-              JSON_BODY=$(jq -n --arg ip "$CURRENT_IP" '{records: [{value: $ip}]}')
-
-              curl \
-                --fail \
-              	-X POST \
-                -H "Authorization: Bearer $HETZNER_API_TOKEN" \
-                -H "Content-Type: application/json" \
-                -d "$JSON_BODY" \
-                "https://api.hetzner.cloud/v1/zones/ppp.pm/rrsets/ha/A/actions/set_records" \
-                && echo $CURRENT_IP > $LAST_IP_FILE
-          fi
-        '';
       };
     };
   };