Skip to content
Snippets Groups Projects

Input devices

Last edited by Aleksi Myllymäki

Some links

Acceleration Distance Potentiometer Light Temperature Temperature&Humidity Color
Sensor adxl343 vl53l0x / vl53l1x / Breakout 10k Trimmer PT15-21B NHQ103B375T10 DHT11/DHT22 VEML6040
My examples My example My example My example My example My example My example
Tutorials Adafruit Adafruit Arduino Digikey Adafruit Adafruit Download the library and see the example

XIAO RP2040 breakout board

breakout_sch breakout_pcb
Schematic PCB

Acceleration ADXL343

adxl_sch adxl_pcb
Schematic PCB
Code 
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_ADXL343.h>

#define ADXL343_SCK D8
#define ADXL343_MISO D9
#define ADXL343_MOSI D10
#define ADXL343_CS D7

/* Assign a unique ID to this sensor at the same time */
/* Uncomment following line for default Wire bus      */
//Adafruit_ADXL343 accel = Adafruit_ADXL343(12345);

/* NeoTrellis M4, etc.                    */
/* Uncomment following line for Wire1 bus */
//Adafruit_ADXL343 accel = Adafruit_ADXL343(12345, &Wire1);

/* Uncomment for software SPI */
Adafruit_ADXL343 accel = Adafruit_ADXL343(ADXL343_SCK, ADXL343_MISO, ADXL343_MOSI, ADXL343_CS, 12345);

/* Uncomment for hardware SPI */
//Adafruit_ADXL343 accel = Adafruit_ADXL343(ADXL343_CS, &SPI, 12345);

void displayDataRate(void)
{
  Serial.print  ("Data Rate:    ");

  switch(accel.getDataRate())
  {
    case ADXL343_DATARATE_3200_HZ:
      Serial.print  ("3200 ");
      break;
    case ADXL343_DATARATE_1600_HZ:
      Serial.print  ("1600 ");
      break;
    case ADXL343_DATARATE_800_HZ:
      Serial.print  ("800 ");
      break;
    case ADXL343_DATARATE_400_HZ:
      Serial.print  ("400 ");
      break;
    case ADXL343_DATARATE_200_HZ:
      Serial.print  ("200 ");
      break;
    case ADXL343_DATARATE_100_HZ:
      Serial.print  ("100 ");
      break;
    case ADXL343_DATARATE_50_HZ:
      Serial.print  ("50 ");
      break;
    case ADXL343_DATARATE_25_HZ:
      Serial.print  ("25 ");
      break;
    case ADXL343_DATARATE_12_5_HZ:
      Serial.print  ("12.5 ");
      break;
    case ADXL343_DATARATE_6_25HZ:
      Serial.print  ("6.25 ");
      break;
    case ADXL343_DATARATE_3_13_HZ:
      Serial.print  ("3.13 ");
      break;
    case ADXL343_DATARATE_1_56_HZ:
      Serial.print  ("1.56 ");
      break;
    case ADXL343_DATARATE_0_78_HZ:
      Serial.print  ("0.78 ");
      break;
    case ADXL343_DATARATE_0_39_HZ:
      Serial.print  ("0.39 ");
      break;
    case ADXL343_DATARATE_0_20_HZ:
      Serial.print  ("0.20 ");
      break;
    case ADXL343_DATARATE_0_10_HZ:
      Serial.print  ("0.10 ");
      break;
    default:
      Serial.print  ("???? ");
      break;
  }
  Serial.println(" Hz");
}

void displayRange(void)
{
  Serial.print  ("Range:         +/- ");

  switch(accel.getRange())
  {
    case ADXL343_RANGE_16_G:
      Serial.print  ("16 ");
      break;
    case ADXL343_RANGE_8_G:
      Serial.print  ("8 ");
      break;
    case ADXL343_RANGE_4_G:
      Serial.print  ("4 ");
      break;
    case ADXL343_RANGE_2_G:
      Serial.print  ("2 ");
      break;
    default:
      Serial.print  ("?? ");
      break;
  }
  Serial.println(" g");
}

void setup(void)
{
  Serial.begin(115200);
  while (!Serial);
  Serial.println("Accelerometer Test"); Serial.println("");

  /* Initialise the sensor */
  if(!accel.begin())
  {
    /* There was a problem detecting the ADXL343 ... check your connections */
    Serial.println("Ooops, no ADXL343 detected ... Check your wiring!");
    while(1);
  }

  /* Set the range to whatever is appropriate for your project */
  // accel.setRange(ADXL343_RANGE_16_G);
  accel.setRange(ADXL343_RANGE_8_G);
  //accel.setRange(ADXL343_RANGE_4_G);
  // accel.setRange(ADXL343_RANGE_2_G);

  /* Display some basic information on this sensor */
  accel.printSensorDetails();
  displayDataRate();
  displayRange();
  Serial.println("");
}

void loop(void)
{
  /* Get a new sensor event */
  sensors_event_t event;
  accel.getEvent(&event);

  /* Display the results (acceleration is measured in m/s^2) */
  Serial.print("X:"); Serial.print(event.acceleration.x); Serial.print("\t");
  Serial.print("Y:"); Serial.print(event.acceleration.y); Serial.print("\t");
  Serial.print("Z:"); Serial.print(event.acceleration.z); Serial.print("\t");Serial.println("");
  delay(50);
}

Distance VL53

vl53_sch vl53_pcb
Schematic PCB
Code 
#include "Adafruit_VL53L1X.h"



Adafruit_VL53L1X vl53 = Adafruit_VL53L1X();

void setup() {
  Serial.begin(115200);
  while (!Serial) delay(10);

  Serial.println(F("Adafruit VL53L1X sensor demo"));

  Wire.begin();
  if (! vl53.begin(0x29, &Wire)) {
    Serial.print(F("Error on init of VL sensor: "));
    Serial.println(vl53.vl_status);
    while (1)       delay(10);
  }
  Serial.println(F("VL53L1X sensor OK!"));

  Serial.print(F("Sensor ID: 0x"));
  Serial.println(vl53.sensorID(), HEX);

  if (! vl53.startRanging()) {
    Serial.print(F("Couldn't start ranging: "));
    Serial.println(vl53.vl_status);
    while (1)       delay(10);
  }
  Serial.println(F("Ranging started"));

  // Valid timing budgets: 15, 20, 33, 50, 100, 200 and 500ms!
  vl53.setTimingBudget(50);
  Serial.print(F("Timing budget (ms): "));
  Serial.println(vl53.getTimingBudget());

  /*
  vl.VL53L1X_SetDistanceThreshold(100, 300, 3, 1);
  vl.VL53L1X_SetInterruptPolarity(0);
  */
}

void loop() {
  int16_t distance;

  if (vl53.dataReady()) {
    // new measurement for the taking!
    distance = vl53.distance();
    if (distance == -1) {
      // something went wrong!
      Serial.print(F("Couldn't get distance: "));
      Serial.println(vl53.vl_status);
      return;
    }
    Serial.print(F("Distance: "));
    Serial.print(distance);
    Serial.println(" mm");

    // data is read out, time for another reading!
    vl53.clearInterrupt();
  }
}

Potentiometer

light_sch light_pcb
Schematic PCB
Code 
//Phototransistor, potentiometer, and NTC thermistor analog read

const int light = A0;
const int pot   = A1;
const int ntc   = A2;

void setup() {
  // put your setup code here, to run once:
  pinMode(light, OUTPUT);
  pinMode(pot, OUTPUT);
  pinMode(ntc, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.print("Light:"); Serial.print(analogRead(light)); Serial.print("\t");
  Serial.print("Potentiometer:"); Serial.print(analogRead(pot)); Serial.print("\t");
  Serial.print("NTC:"); Serial.print(analogRead(ntc)); Serial.print("\t");
  Serial.println();
  delay(50);


}

Light Phototransistor

light_sch light_pcb
Schematic PCB
Code 
//Phototransistor, potentiometer, and NTC thermistor analog read

const int light = A0;
const int pot   = A1;
const int ntc   = A2;

void setup() {
  // put your setup code here, to run once:
  pinMode(light, OUTPUT);
  pinMode(pot, OUTPUT);
  pinMode(ntc, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.print("Light:"); Serial.print(analogRead(light)); Serial.print("\t");
  Serial.print("Potentiometer:"); Serial.print(analogRead(pot)); Serial.print("\t");
  Serial.print("NTC:"); Serial.print(analogRead(ntc)); Serial.print("\t");
  Serial.println();
  delay(50);


}

Temperature NTC

light_sch light_pcb
Schematic PCB
Code 
//Phototransistor, potentiometer, and NTC thermistor analog read

const int light = A0;
const int pot   = A1;
const int ntc   = A2;

void setup() {
  // put your setup code here, to run once:
  pinMode(light, OUTPUT);
  pinMode(pot, OUTPUT);
  pinMode(ntc, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.print("Light:"); Serial.print(analogRead(light)); Serial.print("\t");
  Serial.print("Potentiometer:"); Serial.print(analogRead(pot)); Serial.print("\t");
  Serial.print("NTC:"); Serial.print(analogRead(ntc)); Serial.print("\t");
  Serial.println();
  delay(50);


}

Color VEML6040

veml_sch veml_pcb
Schematic PCB