pwm out

Drives a PWM signal on a pin, for dimming an LED, setting a motor's speed, or any other variable duty cycle.

Properties

• pin — the GPIO pin. Default 12.
• frequency (Hz) — the PWM frequency. Default 1000. Must be 1 or more.

Wiring

Input — payload is the duty cycle as a fraction, from 0.0 (always off) to 1.0 (always on). A value below 0 is taken as 0 and one above 1 as 1. True and False work as 1 and 0. A string, even "0.5", fails: convert it first, in a function node. A message with no payload sets the duty to 0.

This node has no output.

Behavior

The duty cycle stays where the last message set it.

Errors

• The payload is a string or another non-number. The console shows a [NODE_ERROR] naming this node. See Reading a node error.
• A pin the board can't use, or one another node sets up differently. Deploy stops and says why. See What gets checked and Hardware is shared.