unispa > Web interface > Processes > Events > Fade in/out

Fade in/out

Fade-in and Fade-out are PWM-related parameters which are only available if PWM is enabled in the Type. Setting the Fade-in to be greater than zero results into a gradual transition of the Pulse duty cycle from 0% to a High output. Other way around, setting the Fade-out to be greater than zero results into a gradual transition of the duty cycle from the High output to 0%:

Fade-in applied to a PWM output following the rising edge.

Fade-out applied to a PWM output following the rising edge.

Fade periods applied to switch-on and switch-off can be set independently from each other.

Inverting a PWM output changes the original pulse range of (0% to High output) into (High output to 100%).

The Fade periods, as all other time period variables, are provided in two parts: Quantity and Unit:

Quantity

The first parameter listed is the Quantity which defines how many time units will have to elapse before the process output reacts to the input event. Its [VALUE] can be anywhere between 0 and 255.

Unit

The second parameter listed is the Unit which defines the time measurement unit of the provided Quantity. Available [VALUE] options are summarized in the following table:

[VALUE]	Unit
`0`	One tenth (0.1) of a second
`1`	One second
`2`	Ten seconds
`3`	One minute
`4`	Ten minutes
`5`	One hour

Thus, effectively, the provided time period can range between 0.1 second and 255 hours.

HTTP

The device will accept HTTP requests at the following URLs related to:

Fade-in Quantity:

(POST) http://[IPv4]/var_set?param=onfad_[PROCESS ID]&val=[VALUE]
(GET) http://[IPv4]/var_request?param=onfad_[PROCESS ID]

Fade-out Quantity:

(POST) http://[IPv4]/var_set?param=offfad_[PROCESS ID]&val=[VALUE]
(GET) http://[IPv4]/var_request?param=offfad_[PROCESS ID]

Fade-in Unit:

(POST) http://[IPv4]/var_set?param=onfadu_[PROCESS ID]&val=[VALUE]
(GET) http://[IPv4]/var_request?param=onfadu_[PROCESS ID]

Fade-out Unit:

(POST) http://[IPv4]/var_set?param=offfadu_[PROCESS ID]&val=[VALUE]
(GET) http://[IPv4]/var_request?param=offfadu_[PROCESS ID]

A combination of:

POST: http://192.168.1.255/var_set?param=offfad_2&val=35
POST: http://192.168.1.255/var_set?param=offfadu_2&val=0 (or keeping the default value)

will set the Fade-out for Process #2 to 3.5 seconds.

Learn more in HTTP API.

MQTT

This parameter cannot be accessed via MQTT. Learn more in MQTT API.