Allow the user to read values from the front proximity sensor

[karbassi]

No description provided.

[blainerothrock]

here are the two methods which tells us how to read the proximity sensors from the robot (from the TinyBit MakeCode extension repository)

    //% blockId=Tinybit_Ultrasonic_Car block="ultrasonic return distance(cm)"
    //% color="#006400"
    //% weight=87
    //% blockGap=10
    //% name.fieldEditor="gridpicker" name.fieldOptions.columns=4
    export function Ultrasonic_Car(): number {

       	let list:Array<number> = [0, 0, 0, 0, 0];
				for (let i = 0; i < 5; i++)
				{
					pins.setPull(DigitalPin.P16, PinPullMode.PullNone);
					pins.digitalWritePin(DigitalPin.P16, 0);
					control.waitMicros(2);
					pins.digitalWritePin(DigitalPin.P16, 1);
					control.waitMicros(15);
					pins.digitalWritePin(DigitalPin.P16, 0);
					let d = pins.pulseIn(DigitalPin.P15, PulseValue.High, 43200);
					list[i] = Math.floor(d / 40);
				}
				list.sort();
				let length = (list[1] + list[2] + list[3])/3;
				return  Math.floor(length);
    }
        
    //% blockId=Tinybit_Ultrasonic_CarV2 block="ultrasonic for V2 return distance(cm)"
    //% color="#006400"
    //% weight=87
    //% blockGap=10
    //% name.fieldEditor="gridpicker" name.fieldOptions.columns=4
    export function Ultrasonic_CarV2(): number {
		pins.setPull(DigitalPin.P16, PinPullMode.PullNone);
		pins.digitalWritePin(DigitalPin.P16, 0);
		control.waitMicros(4);
		pins.digitalWritePin(DigitalPin.P16, 1);
		control.waitMicros(10);
		pins.digitalWritePin(DigitalPin.P16, 0);

		let d = pins.pulseIn(DigitalPin.P15, PulseValue.High, 500 * 58);
        return  Math.floor(d / 58);

    }

I will need to test which methods works best. I am not sure if V2 refers to a version two of the method, or the hardware.

analog comm.

• toggle pin 16 0 -> 1
• read pin 15
• convert analog reading to cm.