Document ESP32 board channel specifications

README.md

@@ -73,6 +73,30 @@ using var rxChannel = new ReceiverChannel(rxChannelSettings);
 rxChannel.Start(clearBuffer: true);
 ```
 
+## ESP Boards and available channels
+
+If you get Exception initializing TX or RX Channel, you have to set the channel based on your ESP32 board version:
+
+- The ESP32 has 8 channels, each of them can be either receiver or transmitter (this is ok for no channel specification, first free channel is ok)
+- The ESP32-C3 has 4 channels, Channel<0> and Channel<1> hardcoded for transmitting signals and Channel<2> and Channel<3> hardcoded for receiving signals.
+- The ESP32-C6 has 4 channels, Channel<0> and Channel<1> hardcoded for transmitting signals and Channel<2> and Channel<3> hardcoded for receiving signals.
+- The ESP32-H2 has 4 channels, Channel<0> and Channel<1> hardcoded for transmitting signals and Channel<2> and Channel<3> hardcoded for receiving signals.
+- The ESP32-S2 has 4 channels, each of them can be either receiver or transmitter.
+- The ESP32-S3 has 8 channels, Channel<0>-Channel<3> hardcoded for transmitting signals and Channel<4>-Channel<7> hardcoded for receiving signals.
+Based on this you can specify the channel in settings:
+
+```
+rxChannelSettings = new ReceiverChannelSettings(0)
+                {
+                    Channel = 3, //2,3 ESP32-C3 ESP32-C6 ESP32-H2 | 4-7 ESP32-S3
+                    ...
+
+txChannelSettings = new TransmitChannelSettings(0)
+                {
+                    Channel=1, //0,1 ESP32-C3 ESP32-C6 ESP32-H2 | 1-3 ESP32-S3
+                    ...
+```                    
+
 ## Build status
 
 | Component | Build Status | NuGet Package |