diff --git a/loud-siren.yaml b/loud-siren.yaml
new file mode 100644
index 0000000..d7f684f
--- /dev/null
+++ b/loud-siren.yaml
@@ -0,0 +1,10 @@
+esphome:
+  name: loud-siren
+  friendly_name: "Loud siren"
+
+  project:
+    name: dasfoo.siren
+    version: "1.0"
+
+packages:
+  device_base: !include templates/esp01s.yaml
diff --git a/reflash.sh b/reflash.sh
index 5c99db8..1d9a60f 100755
--- a/reflash.sh
+++ b/reflash.sh
@@ -22,6 +22,7 @@ flash=(
 	"${command?} bathroomheater.yaml"
 	"${command?} blinds.yaml"
 	"${command?} heating.yaml"
+	"${command?} loud-siren.yaml"
 	"${command?} ruuvi.yaml"
 	"${command?} watermeter.yaml"
 )
diff --git a/templates/esp01s.yaml b/templates/esp01s.yaml
new file mode 100644
index 0000000..a66915b
--- /dev/null
+++ b/templates/esp01s.yaml
@@ -0,0 +1,17 @@
+esp8266:
+  board: esp01_1m
+
+packages:
+  wifi: !include wifi.yaml
+  ota: !include ota.yaml
+  mqtt: !include mqtt.yaml
+  uptime: !include uptime.yaml
+  restart: !include restart.yaml
+
+logger:
+
+switch:
+- platform: gpio
+  pin: GPIO0
+  name: None
+  inverted: true