Subj : Re: moisture sensor
To   : Avon
From : Jeff
Date : Mon Jan 24 2022 01:12:43

On 24 Jan 2022, Avon said the following...
 Av> That sounds really neat. I have not played with Ardunio gear but it
 Av> sounds like it would be something ideally suited for what you have used.
 Av> Are there scripts along these lines you can download from other Ardunio
 Av> users or is this something you just whipped up yourself ;-)

The code is pretty straightforward, really, if anyone wants to do something
similar. The only things that aren't are that pin 13 is the "alert" LED -- to
let me kow that something needs watering, ping 15-19 are the analog inputs
from the moisture sensors, and text coordinates for the 16x2 LCD display are
in Y,X format.

-----
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
char *plants[]={"1 Rosemary", "2 Thyme", "3 Oregano", "4 Basil", "5
Rosemary"};
byte levels[] ={ 10,           20,        20,              30,            10};

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(13, OUTPUT);
}

void loop() {
  byte i;
  int raw;
  int percent;
  int alert;

  alert=LOW;
  for(i=0; i<5; i++) {
    lcd.clear();
    raw = analogRead(15+i);
    lcd.print(plants[i]);
    lcd.setCursor(11,0);
    lcd.print("(");
    lcd.print(levels[i]);
    lcd.print("%)");
    percent=map(raw, 550, 285, 0, 100);
    lcd.setCursor(0,1);
    lcd.print("Moisture: ");
    lcd.print(percent);
    lcd.print("%");
    if(percent<levels[i]) {
      alert=HIGH;
      lcd.setCursor(15,1);
      lcd.print("*");
    }
    delay(2000);
  }
  digitalWrite(13, alert);
}

-----
Jeff.

--- Mystic BBS v1.12 A46 2020/08/26 (Raspberry Pi/32)
 * Origin: Cold War Computing BBS (21:1/180)

.