Guys i have a lcd i recently got shipped to. And i think i couldnt find help for it.
I have attached the image of the lcd and its config image as mentioned in th lcd itself .
I want to know is E =en, VEE = VO and VCC = VDD as we normally know a lcd. What is the LED+ and LED- and what is VSS
Also is there any editing i should do in my code
BTW im doing it without potentiometer
thanks to @xfpd @arduinojanuary @UKHeliBob for helping me in my last post.
link to last post
link to a Arduino interfacing with LCD
heres my code
#include <LiquidCrystal.h>
#include <dht.h>
#define dht_apin A0
dht DHT;
const int rs =12, en = 11, d4 = 5,d5 = 4,d6 = 3,d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
const int sense_pin = A1;
int relay = 8;
int pump = 0;
void setup() {
pinMode(relay, OUTPUT);
Serial.begin(9600);
delay(1000);
Serial.println("Welcome to Plant Temperature reader");
lcd.begin(16,2);
delay(1000);
lcd.clear();
}
void loop() {
DHT.read22(dht_apin);
int moist;
int sense_apin;
sense_apin = analogRead(sense_pin);
moist = (100-((sense_apin/1023) * 100));
Serial.print("Current temperature=");
Serial.print(DHT.temperature);
Serial.print("°C\n\n");
Serial.print("Current Humidity=");
Serial.print(DHT.humidity);
Serial.print("%\n\n");
Serial.print("Current Soil moisture=");
Serial.print(moist);
Serial.print("%\n\n");
delay(1000);
if(moist<15){
digitalWrite(relay,HIGH);
pump = 1;
}
else{
digitalWrite(relay, HIGH);
pump = 0;
}
if(DHT.temperature<60 || DHT.temperature>-30 && DHT.humidity>0){
lcd.setCursor(0,0);
lcd.print("Temper..=");
lcd.setCursor(15,0);
lcd.print("C");
lcd.setCursor(0,1);
lcd.print("Humidity=");
lcd.setCursor(15,1);
lcd.print("%");
lcd.setCursor(9,0);
lcd.print(DHT.temperature);
lcd.setCursor(9,1);
lcd.print(DHT.humidity);
delay(2000);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Soil moist=");
lcd.setCursor(12,0);
lcd.print(moist);
lcd.setCursor(15,0);
lcd.print("%");
lcd.setCursor(0,1);
lcd.print("Water pump");
if(pump==0){
lcd.setCursor(11,1);
lcd.print("OFF");
}
else{
lcd.setCursor(11,1);
lcd.print("ON");
}
delay(2000);
}
if(DHT.temperature>60 || DHT.temperature<-30 || DHT.humidity==0){
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Maybe an error");
lcd.setCursor(0,1);
lcd.print(" has occured!");
delay(2000);
}
}
