Checking for features

User firmware is designed to run transparently regardless of what type of device it is run on. However, sometimes you will need to have code that varies depending on the capabilities of the device.

It's always best to check for a capability, rather than a specific device. For example, checking for cellular instead of checking for the Electron allows the code to work properly on the Boron without modification.

Some commonly used features include:

Wiring_Cellular
Wiring_Ethernet
Wiring_IPv6
Wiring_Keyboard
Wiring_Mouse
Wiring_Serial2
Wiring_Serial3
Wiring_Serial4
Wiring_Serial5
Wiring_SPI1
Wiring_SPI2
Wiring_USBSerial1
Wiring_WiFi
Wiring_Wire1
Wiring_Wire3
Wiring_WpaEnterprise

For example, you might have code like this to declare two different methods, depending on your network type:

#if Wiring_WiFi
    const char *wifiScan();
#endif

#if Wiring_Cellular
    const char *cellularScan();
#endif

The official list can be found in the source.