problem: multiple relays for solenoid valves

Projects Programming
1

Hi everyone,

I'm really new to programming and decided to use my very basic skills to program an automated herb garden.
I'm having an issue and I would really appreciate some help- even if that means just pointing me toward some information so i can figure it out myself.

Arduino Mega2560
8 Channel 5V relay module
LCD Shield
Soil moisture sensors

I've attached a basic drawing of how i have it set up also attached the code.
I'm not sure if I've done it correctly, but I tried to scale the analog input to use as a percentage.
The readings from the sensors are displayed on the LCD screen.

PROBLEM:
When the moisture reading from the sensor drops below the threshold value, I want to energize both the correct solenoid valve and the water pump.
This works great for 1 ifstatement alone, but the waterpump relay (pin44) only energizes in parallel with 1 solenoid.
The other 4 ifstatements will energise the solenoid relay, but not the waterpump relay.

Where am I going wrong??

Many Thanks

herb_mk2.ino (2.67 KB)

Herb.pdf (15.3 KB)

2

I guess you need another If statement and remove the pump control from the individual if statements

if ( coriander < 20 || mint < 20 || . . .  ) {
    digitalWrite(44, HIGH);
}
else {
    digitalWrite(44, LOW);
}