add info how to use v2.0.0 with old firmware versions

README.md

@@ -9,7 +9,8 @@ This component adds support for [Bayernlüfter](https://www.bayernluft.de) devic
 
 If you like this component, please give it a star on [github](https://github.com/mampfes/ha_bayernluefter).
 
-This integration requires at least revision firmware revision WS32234601 (which supports JSON export).
+This integration works out of the box with firmware revision equal or newer than WS32234601 (which supports JSON export).
+If you are using an older version you can still use this integration if you do an extra configuration step. Please check the [Notes](#notes) section.
 
 ## Installation
 
@@ -36,7 +37,14 @@ By factory default, the device name is equal to the MAC address of the device. T
 
 ## Notes
 
-Since firmware version WS32240427, the speed of the 3 fan motors can be controlled individually. But these controls will only work if the device is switched off!!! This is a limitation of the firmware of the device, not the integration.
+- Since firmware version WS32240427, the speed of the 3 fan motors can be controlled individually. But these controls will only work if the device is switched off!!! This is a limitation of the firmware of the device, not the integration. If you are using an older revision, the controls are not functional.
+
+- If you are using a firmware revision older than WS32234601, you have to upload a special template file:
+
+  1. Download the [template](./doc/export.txt).
+  2. Open the _Experten-Browser_ of your device: `http://<ip-address/browser.html`
+  3. Select the downloaded `export.txt` in the _Experten-Browser_ and click on _Hochladen_.
+  4. Reload the integration in Home Assistant or restart Home Assistant.
 
 ## Acknowledgements
 

doc/export.txt

@@ -0,0 +1,30 @@
+{
+    "Date": "~Date~",
+    "Time": "~Time~",
+    "DeviceName": "~DeviceName~",
+    "MAC": "~MAC~",
+    "LocalIP": "~LocalIP~",
+    "RSSI": "~RSSI~",
+    "FW_MainController": "~FW_MainController~",
+    "FW_WiFi": "~FW_WiFi~",
+    "SystemMode": "~SystemMode~",
+    "Speed_In": "~Speed_In~",
+    "Speed_Out": "~Speed_Out~",
+    "Speed_AntiFreeze": "~Speed_AntiFreeze~",
+    "Temp_In": "~Temp_In~",
+    "Temp_Out": "~Temp_Out~",
+    "Temp_Fresh": "~Temp_Fresh~",
+    "rel_Humidity_In": "~rel_Humidity_In~",
+    "rel_Humidity_Out": "~rel_Humidity_Out~",
+    "abs_Humidity_In": "~abs_Humidity_In~",
+    "abs_Humidity_Out": "~abs_Humidity_Out~",
+    "Efficiency": "~Efficiency~",
+    "Humidity_Transport": "~Humidity_Transport~",
+    "SystemOn": "~_SystemOn~",
+    "FrostschutzAktiv": "~_FrostschutzAktiv~",
+    "SpeedFrozen": "~_Frozen~",
+    "AbtauMode": "~_AbtauMode~",
+    "VermieterMode": "~_VermieterMode~",
+    "QuerlueftungAktiv": "~_QuerlueftungAktiv~",
+    "TimerActiv": "~_MaxMode~"
+}