diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index a5a1a38..aff286a 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -11,7 +11,7 @@
  * - Push sensor values to influxdb
  * - Webserver for /metrics endpoint (Prometheus)
  * - Show current sensor values over simple webpage
- * - Push sensor values to various 3rd party services
+ * - Push sensor values to various 3rd party services (https://openweathermap.org/)
  * - MQTT?
  * 
  * - Buffer sensor values if there is no WIFI connection