RGB LED
By default the heartbeat LED flashes in blue colour once every 4s to signal that the system is alive. This can be overridden through the pycom module.
import pycom
pycom.heartbeat(False)
pycom.rgbled(0xff00) # turn on the RGB LED in green colour
The heartbeat LED is also used to indicate that an error was detected.
The following piece of code uses the RGB LED to make a traffic light that runs for 10 cycles.
import pycom
import time
pycom.heartbeat(False)
for cycles in range(10): # stop after 10 cycles
pycom.rgbled(0x007f00) # green
time.sleep(5)
pycom.rgbled(0x7f7f00) # yellow
time.sleep(1.5)
pycom.rgbled(0x7f0000) # red
time.sleep(4)
Here is the expected result:
