RosarIoT
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Mini Hydroponic System

Hydroponics simulation model with Fischertechnik TXT Controller and DFRobot sensors

IntermediateFull instructions provided499
Mini Hydroponic System

Things used in this project

Hardware components

Gravity: Analog Spear Tip pH Sensor / Meter Kit
DFRobot Gravity: Analog Spear Tip pH Sensor / Meter Kit
×1
Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino
DFRobot Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino
×1
DFRobot - Gravity: Analog TDS Sensor
×1
DFRobot - 370 Mini Vacuum Pump
×1
Fischertechnik - TXT Controller
×1
FIschertechnik - Environmental sensor
×1
LED Strip, 80 mm
LED Strip, 80 mm
Leds 5630 10 Red / 5 Blue
×15

Software apps and online services

Weeot IoT Platform

Story

Read more

Schematics

Diagram

Code

hidro_code_example.py

Python
import paho.mqtt.client as paho
import ftrobopy
from time import sleep
import statistics
import bme680
import json
import threading

#TXT---------------------------------------------------------------------------------------------------------
txt = ftrobopy.ftrobopy('192.168.7.2', 65000)

#MQTT--------------------------------------------------------------------------------------------------------
broker="your-broker-host"
port=your-broker-port
topic="your-broker-topics"
username = 'your-broker-username'
password = 'your-broker-password'

#IO1---------------------------------------------------------------------------------------------------------
ioPin01 = txt.resistor(1)

#IO4---------------------------------------------------------------------------------------------------------
ioPin04 = txt.voltage(4)

#IO5---------------------------------------------------------------------------------------------------------
ioPin05 = txt.voltage(5)
io05VoltListSamples=[]

#IO6---------------------------------------------------------------------------------------------------------
ioPin06 = txt.voltage(6)
cal1Volt=1000
cal1Temp=27
#TableODEquivalence https://wiki.dfrobot.com/Gravity__Analog_Dissolved_Oxygen_Sensor_SKU_SEN0237
odEquivList=[14460,14220,13820,13440,13090,12760,12440,12110,11830,11560,11290,11040,10760,10540,10310,10060,9860,9640,9470,9270,9090,8910,8740,8570,8410,8250,8110,7960,7830,7680,7560,7430,7300,7170,7060,6940,6940,6840,6600,6520,6400,6330,6230,6130,6060,5970,5880,5790]

#M3----------------------------------------------------------------------------------------------------------
M3 = txt.motor(3)
M3Status = 'stop'

#------------------------------------------------------------------------------------------------------------
samples=20
offSetTempAmbiente= 0.0
offSetTempAgua= 0.0
offSetPh= 0.0
txtTimeAcum=0
pumpTime=0

def on_connect(client, userdata, flags, rc):
    if rc == 0:
        print("Connected to MQTT Broker!")
    else:
        print("Failed to connect, return code %d\n", rc)

def get_io01_samples(samples):
        io01SamplesSum=0
        io01VoltSamples=[]        
        for i in range(samples):
            txt.updateWait(0.05)
            ioVoltPin01Value = ioPin01.ntcTemperature()
            ioVoltPin01ValueSample = '{:.2f}'.format(ioVoltPin01Value) 
            io01VoltSamples.append(float(ioVoltPin01ValueSample))
            if i < samples:
                continue    
        for j, val in enumerate(io01VoltSamples):
                io01SamplesSum = val + io01SamplesSum                      
        return io01SamplesSum/20
        
def get_io04_samples(samples):
        io04SamplesSum=0
        io04VoltSamples=[]        
        for i in range(samples):
            txt.updateWait(0.05)
            ioVoltPin04Value = ioPin04.voltage()/1000
            ioVoltPin04ValueSample = '{:.2f}'.format(ioVoltPin04Value) 
            io04VoltSamples.append(float(ioVoltPin04ValueSample))
            if i < samples:
                continue    
        for j, val in enumerate(io04VoltSamples):
                io04SamplesSum = val + io04SamplesSum                      
        return io04SamplesSum/20  
        
def get_io05_samples(samples):
        io05SamplesSum=0
        io05VoltSamples=[]        
        for i in range(samples):
            txt.updateWait(0.1)
            ioVoltPin05Value = ioPin05.voltage()/1000
            ioVoltPin05ValueSample = '{:.2f}'.format(ioVoltPin05Value) 
            io05VoltSamples.append(float(ioVoltPin05ValueSample))
            if i < samples:
                continue    
        for j, val in enumerate(io05VoltSamples):
                io05SamplesSum = val + io05SamplesSum                      
        return io05SamplesSum/20 
        
def get_io06_samples(samples):
        io06SamplesSum=0
        io06VoltSamples=[]        
        for i in range(samples):
            txt.updateWait(0.05)
            ioVoltPin06Value = ioPin06.voltage()/1000
            ioVoltPin06ValueSample = '{:.2f}'.format(ioVoltPin06Value) 
            io06VoltSamples.append(float(ioVoltPin06ValueSample))
            if i < samples:
                continue    
        for j, val in enumerate(io06VoltSamples):
                io06SamplesSum = val + io06SamplesSum                      
        return io06SamplesSum/20 
        
def json_mqtt(your-broker-payload):

        j={              
              "payload" : { "your-broker-payload"                 
              }              
            }
        p = json.dumps(j)
        return p

client = paho.Client()
client.username_pw_set("your-broker-username","your-broker-password")
client.on_connect = on_connect
client.connect("your-broker-host", your-broker-port)
client.loop_start()

while 1:
    #temp---------------------------------------------
    tempAgua = get_io01_samples(samples)+offSetTempAgua
    #bme680--------------------------------------------    
    try:
        sensor = bme680.BME680(bme680.I2C_ADDR_PRIMARY)
    except (RuntimeError, IOError):
        sensor = bme680.BME680(bme680.I2C_ADDR_SECONDARY)
    sensor.set_temperature_oversample(bme680.OS_8X)	
    sensor.set_humidity_oversample(bme680.OS_2X)
    sensor.set_filter(bme680.FILTER_SIZE_3)
    temp= '{:.1f}'.format(sensor.data.temperature)
    hum= '{:.0f}'.format(sensor.data.humidity)    
    tempAmbiente= float(temp)-offSetTempAmbiente    
    tempComp=1+0.02*(tempAgua-25)
    #od------------------------------------------------
    ioPin06Volt = get_io06_samples(samples)   
    voltSat = cal1Volt + 35 * int(tempAgua) - cal1Temp * 35
    od = (((ioPin06Volt*1000) * odEquivList[int(tempAgua)]) / voltSat)/1000
    odFormat="{:.2f}".format(od)
    #ph------------------------------------------------
    ioPin05Volt=get_io05_samples(samples)
    phValue=ioPin05Volt*3.5+offSetPh
    phFormat=("{:.1f}".format(phValue)) 
    #tds-----------------------------------------------
    tdsCompVolt = get_io04_samples(samples)/tempComp
    tdsValue=(133.42*tdsCompVolt**3 - 255.86*tdsCompVolt**2 + 857.39*tdsCompVolt)*0.55
    tdsFormat="{:.0f}".format(tdsValue)    
        
    #print("{:.0f}".format(tdsValue))
    #print("{:.1f}".format(phValue))
    #print("{:.2f}".format(odFormat))  
    #print("{:.1f}".format(tempAmbiente))   
    #print("{:.1f}".format(tempAgua))       
    txt.updateWait(10)
    pumpTime=pumpTime+10
    print(pumpTime)  
    
    if pumpTime >= 1800:
        txtTimeAcum=txtTimeAcum+10 
        if M3Status == 'stop': 
            M3Status='run'  
            M3.setSpeed(512) 
            #t1.start()
            print(txtTimeAcum)            
        else:
            if txtTimeAcum >= 900:
                M3Status='stop'
                M3.stop()
                txtTimeAcum=0
                pumpTime=0   
                print(txtTimeAcum)
                print("PUMP STOP")                              
    else:        
        pumpTimeMin=30-pumpTime/60
        client.publish("your-broker-topics","your-broker-payload"),qos=1)    

Credits

RosarIoT

RosarIoT

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