diff --git a/tools/rpi/ahoy.conf.example b/tools/rpi/ahoy.conf.example
new file mode 100644
index 00000000..77338d00
--- /dev/null
+++ b/tools/rpi/ahoy.conf.example
@@ -0,0 +1,9 @@
+[mqtt]
+host = 192.168.84.2
+port = 1883
+
+[dtu]
+serial = 99978563412
+
+[inverter]
+serial = 444473104619
diff --git a/tools/rpi/ahoy.py b/tools/rpi/ahoy.py
index 2757a227..6ae698d9 100644
--- a/tools/rpi/ahoy.py
+++ b/tools/rpi/ahoy.py
@@ -24,11 +24,10 @@ mqtt_client = paho.mqtt.client.Client()
 mqtt_client.connect(mqtt_host, mqtt_port)
 
 # Master Address ('DTU')
-dtu_ser = 99978563412  # identical to fc22's
+dtu_ser = cfg.get('dtu', 'serial', fallback='99978563412')  # identical to fc22's
 
 # inverter serial numbers
-#inv_ser = 444473104619  # identical to fc22's #99972220200
-inv_ser = 114174608145  # my inverter
+inv_ser = cfg.get('inverter', 'serial', fallback='444473104619')  # my inverter
 
 # all inverters
 #...