diff --git a/ampel-firmware.h b/ampel-firmware.h
index f749605fa9621cf51e1447be815294672c306016..04190740b8ef6ac37cf342750d63db5207c03a17 100644
--- a/ampel-firmware.h
+++ b/ampel-firmware.h
@@ -23,7 +23,7 @@
 #include "csv_writer.h"
 
 #if defined(ESP8266)
-//allows sensor to be seen as SENSOR_ID.local, from the local network. For example : espd05cc9.local
+//allows sensor to be seen as SENSOR_ID.local, from the local network. For example : espd03cc5.local
 #  include <ESP8266mDNS.h>
 #elif defined(ESP32)
 #  include <ESPmDNS.h>
diff --git a/config.public.h b/config.public.h
index 729fd87f1abb310dd18e113149fdc3e620f5e426..8e30739d7e11708778701d709ba5c1415284c4ea 100644
--- a/config.public.h
+++ b/config.public.h
@@ -80,13 +80,13 @@
  * An MQTT subscriber can then get the data from the corresponding broker, either encrypted or unencrypted:
  *
  *  ❯ mosquitto_sub -h 'test.mosquitto.org' -p 8883 -t 'CO2sensors/#' --cafile mosquitto.org.crt -v
- *  CO2sensors/ESPd05cc9 {"time":"2020-12-13 13:14:37+01", "co2":571, "temp":18.9, "rh":50.9}
- *  CO2sensors/ESPd05cc9 {"time":"2020-12-13 13:14:48+01", "co2":573, "temp":18.9, "rh":50.2}
+ *  CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:14:37+01", "co2":571, "temp":18.9, "rh":50.9}
+ *  CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:14:48+01", "co2":573, "temp":18.9, "rh":50.2}
  *  ...
  *
  *  ❯ mosquitto_sub -h 'test.mosquitto.org' -t 'CO2sensors/#' -v
- *  CO2sensors/ESPd05cc9 {"time":"2020-12-13 13:15:09+01", "co2":568, "temp":18.9, "rh":50.1}
- *  CO2sensors/ESPd05cc9 {"time":"2020-12-13 13:15:20+01", "co2":572, "temp":18.9, "rh":50.3}
+ *  CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:15:09+01", "co2":568, "temp":18.9, "rh":50.1}
+ *  CO2sensors/ESPd03cc5 {"time":"2020-12-13 13:15:20+01", "co2":572, "temp":18.9, "rh":50.3}
  *  ...
  */
 
diff --git a/mqtt.cpp b/mqtt.cpp
index 8ae62759c24532713495e24bc6f5151262eac5db..eec0eef5495b09fd8ab15b2883dbe641b32f8d49 100644
--- a/mqtt.cpp
+++ b/mqtt.cpp
@@ -106,7 +106,7 @@ namespace mqtt {
   }
 
   void sendInfoAboutLocalNetwork() {
-    char info_topic[60]; // Should be enough for "CO2sensors/ESPd05cc9/info"
+    char info_topic[60]; // Should be enough for "CO2sensors/ESPd03cc5/info"
     snprintf(info_topic, sizeof(info_topic), "%s/info", publish_topic.c_str());
 
     char payload[75]; // Should be enough for info json...
@@ -190,7 +190,7 @@ namespace mqtt {
     if (mqttClient.connected()) {
       //TODO: Send local IP?
       if (config::allow_mqtt_commands) {
-        char control_topic[60]; // Should be enough for "CO2sensors/ESPd05cc9/control"
+        char control_topic[60]; // Should be enough for "CO2sensors/ESPd03cc5/control"
         snprintf(control_topic, sizeof(control_topic), "%s/control", publish_topic.c_str());
         mqttClient.subscribe(control_topic);
         mqttClient.setCallback(controlSensorCallback);