Go to System > UAVOBrowser > Settings > HwSettings > ADCRouting and select the adc input pin used for AnalogAirspeed function. Output port 5 is a good choice for the airspeed input, it's still free to use for most fixed wing setups and easy to connect using a servo connector. Here is the adc mapping for various boards: Board | adc0 | adc1 | adc2 | adc3 | adc4 | adc5 | adc6 |
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Revolution | Sonar PWR port pin 3 | Sonar PWR port pin 4 | Output port out 3 | Output port out 4 | Output_port out 5 | Output port out 6 | internal | Sparky2 | PWR port pin 3 | PWR port pin 4 | PWR port pin2 | Output port out 3 | Output port out 4 | Output_port out 5 | Output port out 6 | RevoNano | FlexiIO pin 4 | FlexiIO pin 5 | FlexiIO pin 6 | FlexiIO pin 7 | FlexiIO pin 8 | Output_port out 5 | Output port out 6 |
FlexiIO refers to the receiver port |