update readme

README.md

@@ -39,7 +39,7 @@ Note: If you already have a NUKI Bridge and you want to keep using it along the
 ## Support
 
 If you haven't ordered your NUKI product yet, you can support me by using my referrer code when placing your order:<br>
-REFEZ82VZVVX6<br>
+REFRVWNWWBTMV<br>
 This will also give you a 30€ discount for your order.
 
 ## MQTT Interface
@@ -184,6 +184,16 @@ If this still doesn't fix the disconnects and the ESP becomes unreachable, the
 "Restart timer" option can be used as a last resort. It will restart the ESP
 after a configured amount of time.
 
+### Pairing with the Lock (or Opener) doesn't work
+There are reports that ESP32 "DEVKIT1" module don't work and pairing is not possible. The reason is unknown, but if you use such a module, try a different one.
+<br><br>
+Reported as working are:<br>
+ESP32-WROOM-32D (DEVKIT V4)<br>
+ESP32-WROOM-32E<br>
+
+For more information check the related issue:<br>
+https://github.com/technyon/nuki_hub/issues/39
+
 ### Authorization data isn't published
 Reading the authorization data from the access log is protected by the configured PIN.
 If you don't get any published data try setting the PIN or try reentering it to make