Keyestudio_TrafficLight

Keyestudio traffic light module, which has green, yellow and red LEDs.

obniz.wired("Keyestudio_TrafficLight", {green, yellow, red [, gnd]})

connect to obniz Board.

// JavaScript Example
var light = obniz.wired("Keyestudio_TrafficLight", {gnd:0, green:1, yellow:2, red:3});

single(led)

turn on a LED exclusively. That is, one LED turns on after turning off the other LEDs.
This function is useful when this module is used as the traffic light, because it guarantees that only one LED is lit.
Specify one of green, yellow and red in the led argument.

// JavaScript Example
var light = obniz.wired("Keyestudio_TrafficLight", {gnd:0, green:1, yellow:2, red:3});
light.single("green");

next()

Lights in order of blue, yellow, and red.

// JavaScript Example
var light = obniz.wired("Keyestudio_TrafficLight", {gnd:0, green:1, yellow:2, red:3});
while (true){
    light.next();
    await obniz.wait(1000);
}

LED Control

https://obniz.io/sdk/parts/LED/README.md

Specify one of green, yellow and red.

• on()

Simply, Turning on a LED.
It provide 5V to LED.

// JavaScript Example
var light = obniz.wired("Keyestudio_TrafficLight", {gnd:0, green:1, yellow:2, red:3});
light.green.on();
light.yellow.on();
light.red.on();

• off()

Turning off a LED.

// JavaScript Example
var light = obniz.wired("Keyestudio_TrafficLight", {gnd:0, green:1, yellow:2, red:3});
light.green.off();
light.yellow.off();
light.red.off();

• blink(interval_ms)

Start blinking a LED.
default interval is 100msec

// JavaScript Example
var light = obniz.wired("Keyestudio_TrafficLight", {gnd:0, green:1, yellow:2, red:3});
light.yellow.blink();