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Moisture-Control
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Create main.ino

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Adrian G L 2023-02-16 20:30:32 +01:00 committed by GitHub
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#include <WiFi.h>
#include <WebServer.h>
#include <EEPROM.h>
const char* ssid = "OpenWrt";
const char* password = "La1003000902";
WebServer server(80);
const int motorPin = 11; // Change this to the pin number connected to the motor relay
const int sensorPin = 16; // Change this to the pin number connected to the moisture sensor
//storage
void writeLongToEEPROM(int address, long value) {
// write the four bytes of the long integer to EEPROM
EEPROM.write(address, (value >> 24) & 0xFF);
EEPROM.write(address + 1, (value >> 16) & 0xFF);
EEPROM.write(address + 2, (value >> 8) & 0xFF);
EEPROM.write(address + 3, value & 0xFF);
EEPROM.commit();
}
long readLongFromEEPROM(int address) {
// read the four bytes of the long integer from EEPROM
byte b1 = EEPROM.read(address);
byte b2 = EEPROM.read(address + 1);
byte b3 = EEPROM.read(address + 2);
byte b4 = EEPROM.read(address + 3);
// combine the four bytes to form a long integer
long value = ((long)b1 << 24) | ((long)b2 << 16) | ((long)b3 << 8) | (long)b4;
return value;
}
//moisture
const int maxAnalogValue = 80000;
const int numReadings = 10; // Number of readings to average
int readings[numReadings]; // Array to store readings
int readingIndex = 0; // Current index in array
int total = 0; // Running total of readings from history
int moisture = 0; //current calculated moisture level
int getMoisture(){
//motor is messing with readings
bool mot = getMotor();
setMotor(true);
delay(10);
// Read the sensor value and add it to the total
total -= readings[readingIndex];
readings[readingIndex] = analogRead(sensorPin);
total += readings[readingIndex];
// Move to the next index in the array
readingIndex = (readingIndex + 1) % numReadings;
// Calculate the average value
moisture = total / numReadings;
setMotor(mot);
return moisture;
}
int getMoisturePercent(){
int m = getMoisture();
//TODO:fix percentage calculation
m = map(m,0,8000,0,100);
return m;
}
//desired moisture
int desiredMoisture; // The desired moisture level
const int desiredMoistureAddress = 0; // Address to store the desired moisture level in EEPROM
void setDesiredMoisture(int m){
if (abs(m - desiredMoisture) >= 50) {
desiredMoisture = m;
writeLongToEEPROM(desiredMoistureAddress, desiredMoisture);
}
}
void setDesiredMoisturePercent(int m){
//todo map from percent
setDesiredMoisture(m);
}
int getDesiredMoisture(){
desiredMoisture = readLongFromEEPROM(desiredMoistureAddress);
return desiredMoisture;
}
int getDesiredMoisturePercent(){
int m = getDesiredMoisturePercent();
//todo map
return m;
}
//motor
bool motorSpinning = false;
void setMotor(bool state){
state = state; //add a ! if need to invert command
digitalWrite(motorPin, state);
motorSpinning = state;
}
bool getMotor(){
return motorSpinning;
}
//trigger watering
void waterTrigger(){
// Add some wiggle room to the desired moisture level
int d = getDesiredMoisture();
int m = getMoisture();
bool mot = getMotor();
int threshold = d * 0.1;
int lowerThreshold = d - threshold;
int upperThreshold = d + threshold;
// Check if the moisture level is below the lower threshold
if (m < lowerThreshold) {
if (!mot){
setMotor(true);
}
}
// Check if the moisture level is above the upper threshold
else if (m > upperThreshold) {
if (mot){
setMotor(false);
}
}
}
//Webinterface
void webserver() {
String html = "<!DOCTYPE html><html><head><title>Moisture Control</title>";
//script
html += "<script>";
html += "function updateMoisture() {";
html += "var xhr = new XMLHttpRequest();";
html += "xhr.onreadystatechange = function() {";
html += "if (xhr.readyState === 4 && xhr.status === 200) {";
html += "document.getElementById('moisture').textContent = xhr.responseText;";
html += "}";
html += "};";
html += "xhr.open('GET', '/moisture', true);";
html += "xhr.send(null);";
html += "}";
html += "setInterval(updateMoisture, 1000);";
html += "function updateMotorstate() {";
html += "var xhr = new XMLHttpRequest();";
html += "xhr.onreadystatechange = function() {";
html += "if (xhr.readyState === 4 && xhr.status === 200) {";
html += "document.getElementById('pumps-running').textContent = xhr.responseText;";
html += "}";
html += "};";
html += "xhr.open('GET', '/pump', true);";
html += "xhr.send(null);";
html += "}";
html += "setInterval(updateMotorstate, 1000);";
html += "function setMotor(state) {";
html += "var xhr = new XMLHttpRequest();";
html += "xhr.onreadystatechange = function() {";
html += "if (xhr.readyState === 4 && xhr.status === 200) {";
html += "document.getElementById('moisture').textContent = xhr.responseText;";
html += "}";
html += "};";
html += "xhr.open('POST', '/pump', true);";
html += "xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');";
html += "xhr.send('set=' + state);";
html += "}";
html += "function setDesiredMoisture() {";
html += "var xhr = new XMLHttpRequest();";
html += "xhr.onreadystatechange = function() {";
html += "if (xhr.readyState === 4 && xhr.status === 200) {";
html += "document.getElementById('desired-moisture').textContent = xhr.responseText;";
html += "}";
html += "};";
html += "var desiredMoisture = document.getElementById('desiredMoisture').value;";
html += "xhr.open('POST', '/desired-moisture', true);";
html += "xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');";
html += "xhr.send('desiredMoisture=' + desiredMoisture);";
html += "}";
html += "</script>";
//html
html += "</head><body>";
html += "<h1>Moisture Control</h1>";
html += "<p>Moisture: <span id='moisture'>"+String( getMoisture())+"</span></p>";
html += "<p>Desired Moisture: <span id='desired-moisture'>"+String( getDesiredMoisture())+"</span></p>";
html += "<p>Pumps running: <span id='pumps-running'>"+String(getMotor())+"</span></p>";
html += "<button onclick='setMotor(1)'>Turn pump on</button>";
html += "<button onclick='setMotor(0)'>Turn pump off</button>";
html += "<p>Set new target for desired moisture:";
html += "<input type='number' id='desiredMoisture' value='" + String( getDesiredMoisture()) + "'><br>";
html += "<button onclick='setDesiredMoisture()'>Set</button>";
html += "</body></html>";
//style
html += "<style>";
html += "</style>";
server.send(200, "text/html", html);
}
void webserverMoisture() {
String response = String(moisture);
server.send(200, "text/plain", response);
}
void webserverDesiredMoisture() {
if (server.hasArg("desiredMoisture")) {
int newDesiredMoisture = server.arg("desiredMoisture").toInt();
setDesiredMoisture(newDesiredMoisture);
String response = String(getDesiredMoisture());
server.send(200, "text/plain", response);
} else {
String response = String(getDesiredMoisture());
server.send(200, "text/plain", response);
}
}
void webserverPump() {
if (server.hasArg("set")) {
int setMotorsWeb = server.arg("set").toInt();
//TODO: add write pump status
if (setMotorsWeb == 1){
setMotor(true);
}else if (setMotorsWeb == 0){
setMotor(false);
}
server.send(200, "text/plain", "OK");
} else {
String response = String(getMotor());
server.send(200, "text/plain", response);
}
}
void setup() {
Serial.begin(115200);
pinMode(motorPin, OUTPUT);
digitalWrite(motorPin, LOW);
//not really needed
pinMode(12, OUTPUT);
digitalWrite(12, LOW);
pinMode(sensorPin, INPUT);
// Read the desired moisture level from EEPROM address 0
EEPROM.begin(128);
desiredMoisture = readLongFromEEPROM(0);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("WiFi connected");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
server.on("/", webserver);
server.on("/moisture", webserverMoisture);
server.on("/desired-moisture", webserverDesiredMoisture);
server.on("/pump", webserverPump);
server.begin();
}
unsigned long previousMillis = 0;
const long interval = 1000; // interval in milliseconds
void loop() {
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
// save the last time you blinked the LED
previousMillis = currentMillis;
waterTrigger();
}
server.handleClient();
}