Circuits.GPIO.set_interrupts
You're seeing just the function
set_interrupts
, go back to Circuits.GPIO module for more information.
Specs
Enable or disable pin value change notifications. The notifications are sent based on the trigger parameter:
- :none - No notifications are sent
- :rising - Send a notification when the pin changes from 0 to 1
- :falling - Send a notification when the pin changes from 1 to 0
- :both - Send a notification on all changes
Available Options:
suppress_glitches
- It is possible that the pin transitions to a value and back by the time that Circuits GPIO gets to process it. This controls whether a notification is sent. Set this tofalse
to receive notifications.receiver
- Process which should receive the notifications. Defaults to the calling process (self()
)
Notifications look like:
{:circuits_gpio, pin_number, timestamp, value}
Where pin_number
is the pin that changed values, timestamp
is roughly when
the transition occurred in nanoseconds since host system boot time,
and value
is the new value.
NOTE: You will need to store the Circuits.GPIO
reference somewhere (like
your GenServer
's state) so that it doesn't get garbage collected. Event
messages stop when it gets collected. If you only get one message and you are
expecting more, this is likely the case.