Arduino - I need to alter my code to insert a delay - arduino

Question

I am running an Arduino Nano (with a RasPi to send to Thingspeak). It measures different things in my office, temp, hum, CO2 AND it waters my plant. :-)
I have a small problem with my code for the plant watering.
Here is what I want it to do:
Loop
Measure Soil moisture
If > 60 run pump for 2 seconds
Delay 180 seconds (this delay goes for all sensors)
I have a problem! This is what the code actually does:
Loop
Measure Soil moisture
If > 60 run pump for 2 seconds
This means that it just keeps watering away, much faster than the water can absorb the water.
Please help me get the delay working.
Thank you. :-)
This is the code I am running:
void loop()
{
int temp = 0, hum = 0, moist = 0, level = 0, co2_ppm = 0;
moist = read_soil_moisture(soil_pin);
temp = read_temp();
hum = read_humidity();
level = read_water_level(water_pin);//reads water level
co2_ppm = CO2_PPM();
//print_sensor(hum, temp, moist, level,co2_ppm);
temp = read_temp();
if (temp >= 3)
{
temp -= 3;
}
else
{
temp = 0;
}
log_sensor(hum, temp, moist, level, co2_ppm); //prints values of sensors to UART
if (moist > 60)
{
digitalWrite(pump, LOW);//Setting relay pin high
delay(2000);//keeps relay pin high for 2 seconds
digitalWrite(pump, HIGH);//Setting relay pin low
}
else
{
digitalWrite(pump, HIGH);//keep relay pin low
}
delay(180000);//take a reading every 180 seconds
Github repo: https://github.com/pkold/Self-watering-plant-system

Answer 1

Do you have readings from the moisture sensor when it is complete dry and when it is fully emerged in water?
When i look at your github repo the moisture value is a percentage which increase when the moisture rises.
Turning on the pump when the moisture is already above 60 will only increase the sensor value.