Timer

Control

input + output

Small RAM

0.3.1

#Description

This component can be very helpful if you want to get something triggered after a certain amount of time, after something else has happened.

#Links

@blokdots/components

#Functions

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#JavaScript / Node.js

@blokdots/components on npm ↗

ClassTimerextends EventEmitter

Timer that counts elapsed time in seconds and emits tick events at a 50 ms resolution.

#Events

Event	Parameters	Description
start	seconds: number	—
tick	seconds: number	—
change	seconds: number	—
stop	seconds: number	—
reset	seconds: number	—
set	seconds: number	—

#Methods

start()

Start counting elapsed time. Has no effect if already running.

stop()

Stop counting elapsed time.

reset()

Reset elapsed time to zero. Restarts the interval if the timer was running.

setTo(value: number)

Set elapsed time to a specific value in seconds.

#Example

JavaScript

import { Board, Timer } from "@blokdots/components";

const board = new Board("/dev/ttyACM0");
await board.open();

const timer = new Timer();

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#C++ (Arduino)

ClassTimerextends ComponentBase

Virtual component that tracks elapsed time in seconds Emits events: tick (every 50ms), start, stop, set, reset

#Setup

C++

#include "blokdots.h"

Timer myComponent(eventBus, MY_EVENT, MY_EVENT, MY_EVENT, MY_EVENT, MY_EVENT);

#Constructor

Timer(bus, evtTick, evtStart, evtStop, evtSet, evtReset, initialValue)

Parameter	Type	Default
bus	EventBus	required
evtTick	uint8_t	required
evtStart	uint8_t	required
evtStop	uint8_t	required
evtSet	uint8_t	required
evtReset	uint8_t	required
initialValue	float	0.0

#Methods

getValue()→ float

Get current timer value in seconds

emittedValue()→ float

Get emitted value (same as getValue for Timer)

start()

Start the timer (continues from current value)

stop()

Stop the timer (pause at current value)

reset()

Reset the timer to 0 and restart

setTo(newValue)

Set timer to a specific value in seconds

Parameter	Type	Default
newValue	float	required