calibration ec manual
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include/ec.h
13
include/ec.h
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@ -29,7 +29,7 @@ uint16_t ec_calib_array_pos=0;
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uint16_t ec_array[EC_ARRAY_SIZE];
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uint16_t ec_array_pos=EC_ARRAY_SIZE;
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unsigned long last_measurement_ec=0;
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#define EC_MEASUREMENT_INTERVAL 30000 //complete filtered measurement every x ms
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#define EC_MEASUREMENT_INTERVAL 60000 //complete filtered measurement every x ms
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//One filtered measurement takes EC_READ_INTERVAL*EC_ARRAY_SIZE*4
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#define EC_READ_INTERVAL 10 //interval of reading adc value inside a measurement. one reading takes about 9-10ms
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@ -52,14 +52,15 @@ float ec25; //ec value but temperature adjusted for 25 degC
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float ec_tempadjust_alpa=0.02;
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float ec_reference_adc=6016.88; //adc reference value for the calibration resistor measurement.
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//EC short circuit adc value: 17497 (for connection restistance testing)
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//EC open circuit adc value: 738
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//EC short circuit adc value: 17497, 17861.4 (for connection resistance testing)
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//EC open circuit adc value: 738, 730, 737.27
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//x^0*p[0] + ... + x^n*p[n]
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//float ec_calibration_polynom[]={691.5992624638029,-1.4015367296761692,0.0008513503472324141,-2.2140576823179093e-07,2.8962580780180067e-11,-1.8577565383307114e-15,4.7162479484903865e-20};
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float ec_calibration_polynom[]={1033.928052655456,-3.8909104921922895,0.005627541436014758,-4.103988840997024e-06,1.7231981870816133e-09,-4.433707707721975e-13,7.203892111369395e-17,-7.406549810844244e-21,4.667420606439905e-25,-1.6439457516812463e-29,2.477292190335455e-34};
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float ec_calibration_linearize_below_adc=0; //use linear approximation below this adc value. 0=disable
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float ec_calibration_linear_lowADC=830; //x0
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//float ec_calibration_polynom[]={1033.928052655456,-3.8909104921922895,0.005627541436014758,-4.103988840997024e-06,1.7231981870816133e-09,-4.433707707721975e-13,7.203892111369395e-17,-7.406549810844244e-21,4.667420606439905e-25,-1.6439457516812463e-29,2.477292190335455e-34};
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float ec_calibration_polynom[]={212.6826331524675,-0.6043878865263305,0.000571551634082491,-1.827897106718841e-07,2.682337041246909e-11,-1.8368511021965982e-15,4.8269168538877025e-20};
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float ec_calibration_linearize_below_adc=6500; //use linear approximation below this adc value. 0=disable
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float ec_calibration_linear_lowADC=750; //x0
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float ec_calibration_linear_lowEC=0; //y0
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bool ec_measurementReady();
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@ -6,20 +6,28 @@
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#define HCSR04_PIN_ECHO 17
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#define HCSR04_PIN_TRIGGER 16
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#define HCSR04_TIMEOUT 5000 //default is 100000 (uS)
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#define READINTERVAL_HCSR04 500
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#define READINTERVAL_HCSR04 200
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#define WATERLEVELMEAN_SIZE 32
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#define WATERLEVELMEAN_FILTER_CUTOFF 8 //max value is around WATERLEVELMEAN_SIZE/2
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float waterlevelMean_array[WATERLEVELMEAN_SIZE];
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uint16_t waterlevelMean_array_pos=0;
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#define WATERLEVEL_UNAVAILABLE -1
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float waterlevel=WATERLEVEL_UNAVAILABLE;
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float waterlevel=WATERLEVEL_UNAVAILABLE; //distance from floor to water surface [mm]
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float watervolume=WATERLEVEL_UNAVAILABLE; //calculated Volume in Reservoir
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uint16_t waterlevel_failcounter=0;
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#define WATERLEVEL_MAXFAILS 15 //maximum counter value
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#define WATERLEVEL_FAILTHRESHOLD 10 //if failcounter is greater or equal this value waterlevel will not be valid
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//Calibration
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float waterlevel_calib_offset_measured=0; //Sollwert
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float waterlevel_calib_offset_sensor=178.67; //Istwert
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float waterlevel_distanceToVolume(float distance);
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float waterlevel_calib_reservoirArea=27*36.5; //area in cm^2
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float waterlevel_heightToVolume(float distance);
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void waterlevel_setup() {
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@ -62,16 +70,20 @@ void waterlevel_loop(unsigned long loopmillis) {
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if (isValueArrayOKf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVEL_UNAVAILABLE)){
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float _distance=getFilteredf(waterlevelMean_array,WATERLEVELMEAN_SIZE,8);
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//float _distance=getFilteredf(waterlevelMean_array,WATERLEVELMEAN_SIZE,WATERLEVELMEAN_FILTER_CUTOFF);
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float _distance=getMaxf(waterlevelMean_array,WATERLEVELMEAN_SIZE);
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waterlevel=waterlevel_distanceToVolume(_distance);
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//Invert distance and offset
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waterlevel=distance-(waterlevel_calib_offset_sensor+waterlevel_calib_offset_measured);
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watervolume=waterlevel_heightToVolume(_distance);
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//float _meanWaterlevel=getMeanf(waterlevelMean,WATERLEVELMEAN_SIZE);
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//Serial.print("\t Dist="); Serial.print(_filteredWaterlevel); Serial.print("mm"); Serial.print("(+- "); Serial.print((getMaxf(waterlevelMean,WATERLEVELMEAN_SIZE)-getMinf(waterlevelMean,WATERLEVELMEAN_SIZE))/2.0); Serial.print(")"); Serial.print(" [mean="); Serial.print(_meanWaterlevel); Serial.print("]");
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}
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if (waterlevel_failcounter>=WATERLEVEL_FAILTHRESHOLD) { //too many failed readings
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waterlevel=-1;
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waterlevel=WATERLEVEL_UNAVAILABLE;
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watervolume=WATERLEVEL_UNAVAILABLE;
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/*if (debug) {
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Serial.print("Waterlevel Failcounter="); Serial.println(waterlevel_failcounter);
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}*/
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@ -80,8 +92,8 @@ void waterlevel_loop(unsigned long loopmillis) {
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}
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}
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float waterlevel_distanceToVolume(float distance){
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return distance;
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float waterlevel_heightToVolume(float distance){
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return waterlevel_calib_reservoirArea/100 * distance/100; //area[cm^2] in dm^2 * height in dm = dm^3= L
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}
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#endif
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@ -8,7 +8,7 @@ import matplotlib.pyplot as plt
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from pandas import *
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# reading CSV file
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data = read_csv("20230505_NaCl_optimized.csv")
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data = read_csv("20230509_NaCl_manuell.csv")
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# converting column data to list
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#solutionAdded = data['solutionAdded'].tolist() #in ml
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@ -68,7 +68,7 @@ xmodel = np.arange(xstart,xstop,increment)
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for model_order in [9,10,11]:
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for model_order in [3,4,5,6]:
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print("model order="+str(model_order))
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# Finding the Model
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p = np.polyfit(x, y, model_order)
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41
src/main.cpp
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src/main.cpp
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@ -1,6 +1,6 @@
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#include <Arduino.h>
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bool debug=true; //print Serial information
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bool debug=false; //print Serial information
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#include "helpfunctions.h"
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#include "ADS1X15.h"
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@ -82,7 +82,7 @@ void setup() {
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//Serial.println("time,tempReservoir,ECadcCalib,ECadc,ECadcAdjusted,EC,EC25");
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//Serial.println("time,tempReservoir,ECadcCalib,ECadc,ECadcAdjusted,sm");
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Serial.println("time,tempReservoir,ECadcCalib,ECadc,ECadcAdjusted");
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}
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@ -100,14 +100,34 @@ void loop() {
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sm_loop(loopmillis);
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static bool getReading=false;
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if (!digitalRead(PIN_BUTTON)) {
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last_check=loopmillis;
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valueError=false;
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Serial.println("Reset ValueError flag by user");
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digitalWrite(PIN_LED,valueError);
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//Serial.println("Reset ValueError flag by user");
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//digitalWrite(PIN_LED,valueError);
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delay(100);
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last_measurement_ec=0; //force reading
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getReading=true;
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ec_flag_measurement_available=false;
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digitalWrite(PIN_LED,HIGH);
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}
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if (loopmillis>last_check+2000) { //check values
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if (ec_flag_measurement_available && getReading) {
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ec_flag_measurement_available=false;
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getReading=false;
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digitalWrite(PIN_LED,LOW);
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Serial.print(loopmillis); Serial.print(",");
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Serial.print(tempCmean_reservoir); Serial.print(",");
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Serial.print(ec_calib_adc); Serial.print(",");
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Serial.print(ec_adc); Serial.print(",");
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Serial.print(ec_adc_adjusted);
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Serial.println();
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}
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if (loopmillis>last_check+2000 && 1==2) { //check values
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last_check=loopmillis;
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@ -181,11 +201,12 @@ void loop() {
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Serial.print(ec25);
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Serial.println();
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Serial.print("Waterlevel="); Serial.print(waterlevel);
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Serial.print("Waterlevel distance,volume = "); Serial.print(waterlevel); Serial.print(","); Serial.print(watervolume);
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if (waterlevel_failcounter>0) {
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Serial.print(" fails="); Serial.print(waterlevel_failcounter);
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}
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Serial.println();
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}
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@ -252,7 +273,5 @@ void loop() {
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/*
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TODO:
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- waterlevel nur -1
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- waterlevel distance to volume fukntion
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- soilmoisture min max calibartion einfügen
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- recalibrate EC. Note min max (shorted, open) values. Test screw terminal connection. Recalibrate EC Probe.
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*/
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