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