Update README.md

raomin · Mar 21, 2024 · 42e3980 · 42e3980
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Showing 1 changed file with 3 additions and 1 deletion.
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@@ -139,7 +139,9 @@ Some heat pumps (ROTEX) have an X10A port which connects differently:
 
 ![](doc/images/rotexX10A.png)
 
-Some users reported that the 5V from their ROTEX was not enough to power their ESP32/ESP8266. In this case, use an USB charger to power the ESP32/ESP8266. The 5V from the X10A is then not needed. Whatever you do, **make sure you keep a wire connecting the GND of the ESP32/ESP8266 to the GND pin of the X10A (even if you power your ESP32/ESP8266 with a USB charger)!!**
+Pin 1 (on the left in the picture) is +5v. Some users reported that the 5V from their ROTEX was not strong enough to power their ESP32/ESP8266. In this case, use an USB charger to power the ESP32/ESP8266. The 5V from the X10A is then not needed.
+
+Whatever you do, **make sure you keep a wire connecting the GND of the ESP32/ESP8266 to the GND pin of the X10A (even if you power your ESP32/ESP8266 with a USB charger)!!**
 
 
 5. Cross check twice the connections and turn on your heat pump. Two new entities AlthermaSensor and AlthermaSwitch should appear in Home Assistant. AlthermaSensor holds the values as attributes.