Both the Meadow F7 Feather development board and Core-Compute Module have an onboard ceramic chip antenna and a U.FL connector for an external antenna for the 2.4GHz WiFi and Bluetooth radio. Additionally, there is a software antenna switch for toggling between the two antenna; by default, the chip antenna is selected, and you must use the Meadow.OS device API to switch to the external antenna.
Determining the Currently Selected Antenna
The current antenna in use is available via the device’s CurrentAntenna property. For example, the following code will write which antenna is currently in use to the console output:
Console.WriteLine($"Current antenna in use: {Device.CurrentAntenna}");
Switching the Antenna
Likewise, switching the antenna is also available via the device. Use the SetAntenna() method to change the current antenna:
Device.SetAntenna(AntennaType.External);