diff --git a/src_docs/source/hardware.rst b/src_docs/source/hardware.rst
index 8b8f2de..1620495 100644
--- a/src_docs/source/hardware.rst
+++ b/src_docs/source/hardware.rst
@@ -16,6 +16,9 @@ I would suggest that you try how it fits into the PET tube before soldering it t
 
 You also need to desolder (remove) the RED ON LED from the ESP32 or the battery power will be reduced a lot.
 
+Final thing is to add a resistor between A0 (Analog PIN) and ground of 470k. The reason is that the esp8266 has a build in resistor which 
+the esp32 does not have. So in order to get a valid voltage (less than 3.2V) on the A= pin this is needed. 
+
 .. image:: images/esp32.jpg
   :width: 500
   :alt: Mounting esp32
diff --git a/src_docs/source/releases.rst b/src_docs/source/releases.rst
index 67b7ce9..7934a09 100644
--- a/src_docs/source/releases.rst
+++ b/src_docs/source/releases.rst
@@ -18,6 +18,7 @@ v0.9.0
 * Updated esp32 target with littlefs support
 * Updated esp32 target with BLE send support (it will simulate a tilt)
 * Mounted esp32 d1 mini mounted to a iSpindle PCB 4.0 (CherryPhilip) which worked fine.
+* Documented hardware changes on esp32
 * Default mDNS name is now shown on WIFI setup page.
 * Added option to manually update/downgrade firmware under hardware settings. 
 * BUG: Corrected PIN for voltage read on ESP32