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| //................................................................................ | ||
| //...',,;;........................;;....:,........''.......',,;;.................. | ||
| //..;c'..'.......................'do...'o;.......'oo'.....;c'..,..'............... | ||
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| //...:olcc:::::cccccclllllooooooddooooooooooolcc:;,,'................... ..... | ||
| //...':lollccccccccccccllllooooodddoolcc:;;,,'.......................... . | ||
| // ...,:llooooooooooddddddddoollc:;,................................... | ||
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| // .............''''',,,,,,,,,'''.................................... | ||
| // .................................................................. | ||
| // ................................................................... | ||
| // | ||
| // picopasco-water: moisture-irrigation-control closed/open loop | ||
| // | ||
| // Firmware controls irrigation pumps using relays triggered from moisture scan. | ||
| // Irrigation control via manual time based or automatic PID closed loop control mechanism. | ||
| // | ||
| // > User inputs: | ||
| // -[soilUL] [soilLL] upper and lower moisture sensor limits | ||
| // -[ctlmode] fully AUTO closed loop = -1; TIMER open loop = 1 [default]; off = 0; | ||
| // -[doseSP] target dispense dosage per pump trigger | ||
| // -[waterIntSP] open loop trigger period for dispense check | ||
| // | ||
| // < Outputs: | ||
| // - Automated closed loop control of irrigation pumps using a moisture sensor for feedback | ||
| // | ||
| // additional libraries required for a successfull build: https://github.com/Seeed-Studio/SGP30_Gas_Sensor https://www.arduinolibraries.info/libraries/sensirion-i2-c-sht4x | ||
| // #include "pins_arduino.h" | ||
| // mailto://[email protected] | ||
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| #include <Arduino.h> | ||
| #include "pins_arduino.h" //custom header for seeed grove pico breakout | ||
| #include <SoftwareSerial.h> | ||
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| #define moisturePin A2 //moisture sensor pin | ||
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| int ctl = 16; //relay GPIO control trigger pins | ||
| int trigger = LOW; //init state of relay | ||
| const int waterIntSP = 10000; //auto water interval [ms] | ||
| int doseSP = 1000; //min dose water time for pump on [ms] *disable unused pump with 0 | ||
| int df = 2 * doseSP ; // dwell (soak) time ms after dispense before reading | ||
| int t_loop = 97; //while wait interval for loop() | ||
| int last_loop = millis(); //last loop time | ||
| int waterprint = 13; //number of status lines to print during water dwell | ||
| int hydrateTotal; //cumulative pump time since boot | ||
| int ctlmode = 0; //fully automatic closed loop = -1; time trigger open loop = 1 [default]; off = 0; | ||
| int soilUL = 700; //upper limit for soil moisture 4-923 | ||
| int soilLL = 400; //lower limit for soil moisture 4-923 | ||
| int moisturePV; | ||
| int lastPV; | ||
| int ledPin = LED_BUILTIN; //led pin | ||
| int ledState = LOW; //init state of led | ||
| unsigned long previousMillis = millis(); //led do while last time stamp | ||
| float waterStart = waterIntSP + millis(); //start time for next auto water | ||
| int hydrocnt = 1; //hydrates since boot | ||
| int olTrigger = 0; | ||
| int closeloopcnt = 0; | ||
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| void setup() { | ||
| Serial.begin(115200); | ||
| pinMode(ctl, OUTPUT); | ||
| digitalWrite(ctl, LOW); | ||
| } | ||
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| void loop() { | ||
| while ((millis() -last_loop) > t_loop) { | ||
| scan(); blink(-1); | ||
| if (millis() > waterStart) { | ||
| olTrigger = 1; | ||
| } | ||
| if ((ctlmode == 1) and (olTrigger ==1)){ //open loop timer | ||
| if (moisturePV <= soilLL) { | ||
| lastPV = moisturePV; hydrate(ctlmode); delay(df); waterStart = waterIntSP + millis(); olTrigger = 0; scan(); Serial.println("INFO|Timer dispense complete|PV(now)|"+String(moisturePV)+"|PV(before)|"+String(lastPV)); | ||
| } | ||
| if ((moisturePV > soilLL) or (moisturePV > soilUL)){ | ||
| waterStart = waterIntSP + millis(); olTrigger = 0; Serial.println(String("INFO|Moisture within limits|PV|"+moisturePV)); | ||
| } | ||
| } | ||
| if ((ctlmode == -1) and (moisturePV < 0.5*(soilLL+soilUL))) { //closed loop auto //SP targets centerline of ul and ll | ||
| closeloopcnt = 0; lastPV = moisturePV; | ||
| while ((moisturePV < (0.5*(soilLL+soilUL)))) { | ||
| hydrate(ctlmode); delay(df); blink(-1); closeloopcnt = closeloopcnt +1; scan(); | ||
| Serial.println("|ClosedLoopCount|"+String(closeloopcnt)+"|PV(now)|"+String(moisturePV)+"|PV(before)|"+String(lastPV)); | ||
| } | ||
| } | ||
| last_loop = millis(); | ||
| } | ||
| } | ||
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| void blink(long led_int) { | ||
| pinMode(ledPin, OUTPUT); | ||
| pinMode(ledPin, OUTPUT); | ||
| unsigned long currentMillis = millis(); | ||
| if ((currentMillis - previousMillis >= led_int) and (led_int > 0) ) { //led_int input in ms -1 toggle rn | ||
| previousMillis = currentMillis; | ||
| if (ledState == LOW) { | ||
| ledState = HIGH; | ||
| } else { | ||
| ledState = LOW; | ||
| } | ||
| digitalWrite(ledPin, ledState); | ||
| } | ||
| if (led_int == -1){ //bypass time interval with -1 toggle rn | ||
| if (ledState == LOW) { | ||
| ledState = HIGH; | ||
| } else { | ||
| ledState = LOW; } ; | ||
| digitalWrite(ledPin, ledState); | ||
| } | ||
| } | ||
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| void scan() { | ||
| String printStr = ""; | ||
| moisturePV = analogRead(moisturePin); | ||
| String pctlmode =String("N/A"); | ||
| switch (ctlmode) { | ||
| case -1: | ||
| pctlmode = "AUTO"; | ||
| break; | ||
| case 1: | ||
| pctlmode = "TIMER"; | ||
| printStr = printStr + (waterStart-millis()); | ||
| break; | ||
| case 0: | ||
| pctlmode = "OFF"; | ||
| break; | ||
| } | ||
| Serial.println(String(millis()) + "> |PV-" + moisturePV + "|UL-"+ soilUL+ "|LL-"+soilLL+"|" + pctlmode + "|" + printStr); | ||
| } | ||
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| void hydrate(int mode){ //int mode = {0 - 0ff; -1 - Auto (ctlmode = -1); 1 - Timer (ctlmode = 1);} | ||
| int pumpon; | ||
| int cnt; | ||
| switch (mode) { | ||
| case -1: | ||
| cnt = 0; | ||
| pumpon = millis() + doseSP; //capture pump end time | ||
| digitalWrite(ctl, HIGH); //trigger relay high | ||
| Serial.println (String(millis())+"> hydration: ON! for "+doseSP+" at "+millis()+" ms ends at "+pumpon+ " ms"); | ||
| while (pumpon >= millis()) { //while pumping print countdown to end at fixed interval | ||
| blink(-1); //blink toggle on demand (-1) else (n>=0 is blink interva) | ||
| Serial.println(String(millis())+"> hydration: "+(pumpon - millis())+" ms of watering time remaining " + (waterprint-cnt) + "/" + waterprint ); cnt = cnt +1; | ||
| delay(doseSP/waterprint); //report status of the remaining pump time setting print interval at 1/19 of the dwell time. | ||
| } | ||
| digitalWrite(ctl, LOW); | ||
| hydrateTotal = hydrateTotal + doseSP; | ||
| waterStart = waterIntSP + millis(); | ||
| Serial.println(String (millis())+"> |PV-"+moisturePV+"|AUTO| - hydration complete|" ); | ||
| Serial.println("|TotalCount|"+String(hydrocnt)); | ||
| Serial.println("|TotalTime|" + String(hydrateTotal)+" ms since boot"); | ||
| Serial.println("|NextTrigger|" + String(waterStart)+" ms"); | ||
| hydrocnt = hydrocnt +1; | ||
| break; | ||
| case 1: | ||
| cnt = 0; | ||
| pumpon = millis() + doseSP; //capture pump end time | ||
| digitalWrite(ctl, HIGH); //trigger relay high | ||
| Serial.println (String(millis())+"> hydration: ON! for "+doseSP+" at "+millis()+" ms ends at "+pumpon+ " ms"); | ||
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| while (pumpon >= millis()) { //while pumping print countdown to end at fixed interval | ||
| blink(-1); //blink toggle on demand (-1) else (n>=0 is blink interva) | ||
| Serial.println(String(millis())+"> hydration: "+(pumpon - millis())+" ms of watering time remaining " + (waterprint-cnt) + "/" + waterprint ); cnt = cnt +1; | ||
| delay(doseSP/waterprint); //report status of the remaining pump time setting print interval at 1/19 of the dwell time. | ||
| } | ||
| digitalWrite(ctl, LOW); | ||
| hydrateTotal = hydrateTotal + doseSP; | ||
| waterStart = waterIntSP + millis(); | ||
| Serial.println(String (millis())+"> |PV-"+moisturePV+"|TIMER| - hydration complete|" ); | ||
| Serial.println("|TotalHydrations|"+String(hydrocnt)); | ||
| Serial.println("|TotalHydrationTime|" + String(hydrateTotal) +" ms since boot"); | ||
| Serial.println("|AutoCorrections|" + String(closeloopcnt)+" ms"); | ||
| hydrocnt = hydrocnt +1; | ||
| break; | ||
| case 0: | ||
| Serial.println("Hydration DISABLED!"); | ||
| break; | ||
| default: | ||
| Serial.println("Invalid input: use form hydrate(int mode) where mode is {0 - 0ff, -1 - Auto (ctlmode = 1), 1 - Timer (ctlmode = 1)}"); | ||
| break; | ||
| } | ||
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| } |
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