Christian
Published © LGPL

Professional Hydroponics pH and DO Monitoring

Build a monitoring system that will measure your pH and DO levels.

IntermediateFull instructions provided1 hour644

Things used in this project

Hardware components

IO Expander Bundle
×1
pH Sensor Kit
Atlas Scientific pH Sensor Kit
×1
Dissolved Oxgyen Probe
Atlas Scientific Dissolved Oxgyen Probe
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

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Schematics

Professional Hydroponics DO Wiring Diagram

How to connect your DO sensor

Professional Hydroponics pH Wiring Diagram

How to connect your pH sensor

Code

Professional Hydroponics pH and DO Monitoring

C/C++
Monitor your pH and DO levels in your Hydroponics System
const char ONEWIRE_TO_I2C_PH[] = "i2s56";    // I2C BUS - pH Sensor *** Change 56
const char PH_SENSOR[] =        "iw63\"r\""; // pH Sensor
const char PH_SLEEP[] =         "iw63\"Sleep\""; // pH Sleep
 
const char ONEWIRE_TO_I2C_DO[] = "i2s08";    // I2C BUS - DO Sensor *** Change 08
const char DO_SENSOR[] =        "iw61\"r\""; // DO Sensor
const char DO_SLEEP[] =         "iw61\"Sleep\""; // DO Sleep
 
void loop() {
 
...
 
  long rc;
  float pH,DO;
 
...
 
        // Check for Atlas Scientific pH probe
        pH = -1;
        if (SerialCmdNoError(ONEWIRE_TO_I2C_PH))
        {
          if (SerialCmdNoError(PH_SENSOR)) {
            delay(900);
            SerialCmd("ia");
            SerialReadInt(&rc);
            if (rc == 1) SerialReadFloat(&pH);
            SerialReadUntilDone();
            SerialCmdDone(PH_SLEEP);
          }
        }
        // Check for Atlas Scientific DO probe
        DO = -1;          
        if (SerialCmdNoError(ONEWIRE_TO_I2C_DO))
        {
          if (SerialCmdNoError(DO_SENSOR)) {
            delay(600);
            SerialCmd("ia");
            SerialReadInt(&rc);
            if (rc == 1) SerialReadFloat(&DO);
            SerialReadUntilDone();
            SerialCmdDone(DO_SLEEP);
          }
        }
 
...
 
}

Credits

Christian

Christian

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