reference from:https://github.com/Play-Zone/GY-VL53L0X/blob/master/vl53l0x-uart.ino
用 serial 讀取模式，結果約保持誤差 20 mm
/***********************************************************************
Sample-Sketch for the VL53L0X Breakout
Connections:
Arduino -> Breakout
VCC VCC
GND GND
IO 10 TX
IO 11 RX
Default Baudrate is 9600
Copyright (c) 2017 GY & PLAY-ZONE GmbH http://www.play-zone.ch
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associate documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
*************************************************************************/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(9, 8); // RX, TX
unsigned char re_Buf[11], counter = 0;
unsigned char sign = 0;
byte data_Buf[3] = {0};
void setup() {
Serial.begin(9600);
mySerial.begin(9600);
mySerial.listen();
delay(10);
mySerial.write(0XA5);
mySerial.write(0X45); // Enable Output
mySerial.write(0XEA);
}
void loop() {
unsigned char i = 0, sum = 0;
uint16_t distance = 0;
while (mySerial.available()) {
re_Buf[counter] = (unsigned char)mySerial.read();
if (counter == 0 && re_Buf[0] != 0x5A) return;
counter++;
if (counter == 8){ // Enough Data available?
counter = 0; // Get Ready for the next stream
sign = 1;
}
}
if (sign){
sign = 0;
for (i = 0; i < 7; i++)
sum += re_Buf[i];
if (sum == re_Buf[i] ){ // Check Header
data_Buf[0] = re_Buf[4];
data_Buf[1] = re_Buf[5];
data_Buf[2] = re_Buf[6];
distance = data_Buf[0] << 8 | data_Buf[1];
Serial.print("distance: ");
Serial.print( distance );
Serial.print(" mm,mode: ");
Serial.println( data_Buf[2] );
}
}
}
用 PWM 讀取模式，誤差依舊，推論為時間低消，距離大一點應該效應會降低
/***********************************************************************
Sample-Sketch for the VL53L0X Breakout
Connections:
Arduino -> Breakout
VCC VCC
GND GND
IO 4 PWM
Default Baudrate is 9600
Copyright (c) 2017 GY & PLAY-ZONE GmbH http://www.play-zone.ch
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associate documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
*************************************************************************/
int pin = 4;
unsigned long duration;
void setup() {
Serial.begin(9600);
pinMode(pin, INPUT);
delay(500);
}
void loop() {
uint16_t distance = 0;
duration = pulseIn(pin, HIGH);
distance = duration / 10;
Serial.print("distance: ");
Serial.print( distance);
Serial.print(" mm,time: ");
Serial.print( duration);
Serial.println("us");
delay(100);
}