docs/esp32: Mention Signal in GPIO section of quickref.

4 years ago · 85c51a548f
1 changed files with 4 additions and 0 deletions
--- a/docs/esp32/quickref.rst
+++ b/docs/esp32/quickref.rst
@ -171,6 +171,10 @@ Notes:
 * The pull value of some pins can be set to ``Pin.PULL_HOLD`` to reduce power
  consumption during deepsleep.

+There's a higher-level abstraction :ref:`machine.Signal <machine.Signal>`
+which can be used to invert a pin. Useful for illuminating active-low LEDs
+using ``on()`` or ``value(1)``.
+
 UART (serial bus)
 -----------------