Merge pull request #797 from SignalK/rgb_led #1396

Job	Run time
build (examples/minimal_app.cpp, esp32dev)	1m 51s
build (examples/analog_input.cpp, esp32dev)	1m 49s
build (examples/hysteresis.cpp, esp32dev)	1m 46s
build (examples/lambda_transform.cpp, esp32dev)	1m 46s
build (examples/manual_networking.cpp, esp32dev)	1m 40s
build (examples/minimal_app.cpp, esp32dev)	1m 50s
build (examples/relay_control.cpp, esp32dev)	1m 50s
build (examples/rpm_counter.cpp, esp32dev)	1m 51s
build (examples/async_repeat_sensor.cpp, esp32dev)	1m 45s
build (examples/repeat_sensor_analog_input.cpp, esp32dev)	1m 55s
build (examples/freertos_tasks.cpp, esp32dev)	1m 42s
build (examples/raw_json.cpp, esp32dev)	1m 45s
build (examples/constant_sensor.cpp, esp32dev)	1m 44s
build (examples/time_counter.cpp, esp32dev)	1m 49s
	25m 3s

Provide feedback