pixl.js with analog moister sensor

here's the arduino code i'll try to convert to a pixl when i get home this weekend. it reads from a moisture sensor, and a temperature/humidity sensor, and displays the values to an rgb display. unfortunately i won't be able to change the display color based on the moisture level, but it will be a good test. in my case i'm using an arduino shield with a grove sensor kit, so it will be a good test on the pixl as a shield as well.

[#include](https://forum.espruino.com/search/?q=%23include) "Arduino.h"
[#include](https://forum.espruino.com/search/?q=%23include) "Wire.h" 
[#include](https://forum.espruino.com/search/?q=%23include) <rgb_lcd.h>
[#include](https://forum.espruino.com/search/?q=%23include) <TH02_dev.h>
[#include](https://forum.espruino.com/search/?q=%23include) <stdio.h>
[#include](https://forum.espruino.com/search/?q=%23include) <math.h>
[#include](https://forum.espruino.com/search/?q=%23include) <TimeLib.h>
[#include](https://forum.espruino.com/search/?q=%23include) <TimeAlarms.h>

rgb_lcd lcd;

const int button = 2;       // connect a button
const int buzzer = 3;       // connect a buzzer
// Test code for Grove - Moisture Sensor 
int sensorPin = A0; // select the input pin for the potentiometer
int moisture = -1; // variable to store the value coming from the sensor7
int prec = 0;
int buttonPress = 0;
int displayOn = 1;

void setup() {
    Serial.begin(9600);
    // declare the ledPin as an OUTPUT:
    pinMode(button, INPUT); //set button as an INPUT device
    pinMode(buzzer, OUTPUT);   //set LED as an OUTPUT device
    // set up the LCD's number of columns and rows:
    lcd.begin(16, 2);
    // Set the LCD background color
    setColor();
    Serial.println("****TH02_dev demo by seeed studio****\n");
    /* Power up,delay 150ms,until voltage is stable */
    delay(150);
    /* Reset HP20x_dev */
    TH02.begin();
    delay(100);
    
    /* Determine TH02_dev is available or not */
    Serial.println("TH02_dev is available.\n");   

    Alarm.timerRepeat(5, readSensors);
    Alarm.timerRepeat(60, displayOff);
}

void loop() {
    buttonPress = digitalRead(button); //read the status of the button
    if( buttonPress && !displayOn ) {
      lcd.display();
      displayOn = 1;
      setColor();
    }
    //digitalWrite(buzzer, btn);

    Alarm.delay(10);
}

void readSensors() {
  Serial.println("Reading sensors");
  // read the value from the sensor:
  moisture = analogRead(sensorPin);
  Serial.print("Moisture = " );
  Serial.println(moisture);
  float temper = TH02.ReadTemperature(); 
  Serial.println("Temperature: ");   
  Serial.print(temper);
  Serial.println("C\r\n");

  float humidity = TH02.ReadHumidity();
  Serial.println("Humidity: ");
  Serial.print(humidity);
  Serial.println("%\r\n");
  char message1[16];
  char message2[16];
  float ftemp = 1.8*temper + 32;
  long t = lround(ftemp);
  int tm = int((ftemp-floor(ftemp))*100)%100;
  long h = lround(humidity);
  int hm = int((humidity-floor(humidity))*100)%100;
  long m = moisture;
  sprintf(message1, "%ld.%dF, %ld.%dRH", t, tm, h, hm);
  Serial.println(int((temper-floor(temper))*100)%100);
  setColor();
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(message1);
  lcd.setCursor(0,1);
  sprintf(message2, "Moisture: %3ld", m);
  lcd.print(message2);
}

void displayOff() {
  if( buttonPress ) {
    buttonPress = 0;
  }
  else {
    lcd.noDisplay();
    lcd.setColorAll();
    displayOn = 0;
  }
}

void setColor() {
  if( displayOn ) {
    if( moisture < 0 ) {
      lcd.setColorAll();
    }
    else if( moisture < 300 ) {
      lcd.setColor(RED);
    }
    else if( moisture < 650 ) {
      lcd.setColor(GREEN);
    }
    else {
      lcd.setColor(BLUE); 
    }
  }
}