This was my first actual project with Arduino, and after about 6 months it was done (this included learning how to work with Arduinos, waiting for various components from Asia and waiting for the box to be 3D printed) 🙂
The schedule (time ranges and respective temperatures) is hardcoded, I don’t see the use of having a menu to program it.
The button functions are:
* Temperature up, it will reset when the next time range starts
* Temperature down, it will reset when the next time range starts
* Reset, it will set the default temperature for the current time range
* Hold current temperature, it will never reset
* Backlight
* Other info (Uptime, IP address and an easter egg 🙂 )
The code:
/* Copyright © 2018 Razvan Murariu <razwww @gmail.com> This program is free software. It comes without any warranty, to the extent permitted by applicable law. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See the COPYING file for more details. The circuit: Arduino Mega 2560 LCD SDA pin to analog pin 20, blue wire LCD SCL pin to analog pin 21, green wire LCD VCC pin to 5V LCD GND pin to ground RTC/SD CS pin to pin 48 RTC/SD MISO pin to digital 50, gray wire RTC/SD MOSI pin to pin 51, yellow wire RTC/SD SCK pin to digital pin 52, purple wire RTC/SD SCL pin to analog pin 21 RTC/SD SDA pin to analog pin 20 RTC/SD VCC pin to 5V RTC/SD GND pin to ground Network card MISO pin to digital pin 50, gray wire Network card MOSI pin to digital pin 51, yellow wire Network card SCS pin to digital pin 10 Network card SCLK pin to pin 52, purple wire Temp sensor (interior) pin to digital pin 8 Temp sensor (exterior) pin to digital pin 9 Buttons to digital pins 2-7 Relay to analog pin A0 & VIn */ #include <dht.h> #include <bounce2.h> #include <wire.h> #include <liquidcrystal_i2c.h> #include <spi.h> #include <ethernet2.h> #include <sd.h> #include <ds1307rtc.h> // a basic DS1307 library that returns time as a time_t //things that you may change: #define displayTime 8000 // display duration of "other info" #define lightTime 8000 // light duration #define buttonDownInterval 3000 // how long to press the button for "about" #define lightOnKeypress 1 //light for each button #define prod 1 // in test mode: permanent backlight const String secret="********"; // secret for URL #define tempMin 5 #define tempMax 30 #define tempConfort 20 #define hysteresis 0.5 //if you change the number of elements in the arrays you must also change the program table const int timeInterval[4] = {480, 510, 1320, 30}; // 8:00, 8:30, 22:00, 00:30 const int tempInterval[4] = {20, 18, 21, 19}; // corresponding temp for each time interval const byte numberOfIntervals = sizeof(timeInterval) / sizeof(int); const long writeTempInterval = 300000; // 5 min, interval for writing temps to file //end of things that you may change :) #define modeAuto 0 // full auto mode, based on the intervals #define modeManual 1 // manual mode, it will reset when the next interval starts #define modeHold 2 // hold mode, permanent manual, it will reset when the RESET button is pushed #define modeInfoH 3 // Info Humidity #define modeInfoUp 4 // Uptime and RAM #define modeInfoIp 5 // IP and mask #define modeAbout 6 // About #define DHTPin 8 // pin for temperature sensor #define DHTType DHT22 // type of temperature sensor #define DHTExtPin 9 // pin for exterior temperature sensor #define DHTExtType DHT22 // type of exterior temperature sensor #define DS1307_I2C_ADDRESS 0x68 // RTC #define relayPort A0 // analog port for the relay float temp; // real temperature (inside) float tempExt; // real temperature (outside) float tempAuto; // temperature according to the auto program float tempManual; // temperature set with the +/- buttons float humidityIn; float humidityExt; float hic; // heat index in Celsius float hicExt; byte mode = 0; byte modeReturn = mode; // remember the mode when displaying info screens byte modeOld = mode; // used for clearing the display when the mode changes int dayOld; // used for syncing NTP once a day boolean relay = false; boolean relayOld = relay; // used for logging the relay state change int totalMinutes; int previousMinutes; byte otherInfo = 0; // degree centigrade symbol uint8_t degree[8] = {0x8, 0xf4, 0x8, 0x43, 0x4, 0x4, 0x43, 0x0}; // for non-I2C LCD byte degree[8] = {B01000, B10100, B01000, B00011, B00100, B00100, B00011, B00000}; // flame symbol uint8_t flame[8] = {0x12, 0x09, 0x12, 0x09, 0x12, 0x09, 0x12, 0x1F}; // for non-I2C LCD byte flame[8] = {0b10010, 0b01001, 0b10010, 0b01001, 0b10010, 0b01001, 0b10010, 0b11111}; unsigned long timerLight = -1; // temporary store millis for display duration unsigned long timerInfo = -1; unsigned long button3Down = 0; // for "about". If the button is pressed when time overflows it won't work const String message = " Made by Razvan & Coralia"; const uint8_t BUTTON_PINS[6] = {7, 6, 5, 4, 3, 2}; const int chipSelect = 48; // CS pin for SD card File systemLog; File temperatureLog; String systemLogFilename; String temperatureLogFilename; String logString; unsigned long previousMillis = 0; // will store when temps were written to file //ethernet settings const boolean dhcp = 0; const byte mac[] = { 0x90, 0xA2, 0xDA, 0x0D, 0x85, 0xD9 }; //physical mac address, mandatory for DHCP or fixed address const byte ip[] = { ***, ***, ***, *** }; // ip in lan const byte dnserver[] = { 8, 8, 8, 8 }; //not really used, but needed in the initialization const byte subnet[] = { ***, ***, ***, *** }; //subnet mask const byte gateway[] = { ***, ***, ***, *** }; // default gateway EthernetServer server(80); //server port // for NTP const unsigned int localPort = 8888; // local port to listen for UDP packets const char timeServer[] = "94.53.216.184"; // time.nist.gov NTP server const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message byte packetBuffer[ NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets // A UDP instance to let us send and receive packets over UDP EthernetUDP Udp; // Initialize LCD LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // 20x4 // Initialize DHT sensor DHT dht(DHTPin, DHTType); DHT dhtExt(DHTExtPin, DHTExtType); Bounce * buttons = new Bounce[6]; Bounce debouncer = Bounce(); //for about // returns the hour and minute when the next interval begins void nextInterval(int &myHour, int &myMinute) { int nextAutoTime; if (totalMinutes > timeInterval[2] || totalMinutes < timeInterval[3]) { nextAutoTime = timeInterval[3]; } else if (totalMinutes < timeInterval[0]) { nextAutoTime = timeInterval[0]; } else if (totalMinutes < timeInterval[1]) { nextAutoTime = timeInterval[1]; } else { nextAutoTime = timeInterval[2]; } myHour = nextAutoTime / 60; myMinute = nextAutoTime % 60; } // - minTotalMinutes: the start of the interval to check // - maxTotalMinutes: the end of the interval to check // - tempAutoLocal: the auto temperature of the interval to check void compareTemperatureAuto (int minTotalMinutes, int maxTotalMinutes, float tempAutoLocal) { if (mode != modeAuto) { // this is not our case and we exit the method return; } if (minTotalMinutes < maxTotalMinutes) { if (totalMinutes >= minTotalMinutes && totalMinutes < maxTotalMinutes) { if (temp < (tempAuto - hysteresis) ) { relay = 1; } else if (temp > (tempAuto + hysteresis) ) { relay = 0; } tempAuto = tempAutoLocal; } } else { // roll-over to the next day if (totalMinutes >= minTotalMinutes || totalMinutes < maxTotalMinutes) { if ( temp <= (tempAuto - hysteresis) ) { relay = 1; } else if ( temp >= (tempAuto + hysteresis) ) { relay = 0; } tempAuto = tempAutoLocal; } } } //function to display mode, clock, target temperature & others on the LCD void displayMode () { char hourMinute [6]; if (mode == modeAuto || mode == modeManual || mode == modeHold) { // current temp lcd.setCursor(0, 0); lcd.print(F("In=")); lcd.print(temp, 1); lcd.print((char)0); lcd.setCursor(10, 0); lcd.print(F("Out=")); lcd.print(tempExt, 1); lcd.print((char)0); lcd.setCursor(0, 2); lcd.print(F("Set")); //clock & time sprintf (hourMinute, "%02u:%02u", hour(), minute()); lcd.setCursor(0, 3); lcd.print(hourMinute); lcd.print(F(" ")); char dayMonthYear [11]; sprintf (dayMonthYear, "%02u.%02u.%04u", day(), month(), year()); lcd.print(dayMonthYear); // relay indicator lcd.setCursor(19, 3); relay ? lcd.print((char)1) : lcd.print(F(" ")); } switch (mode) { int myHour, myMinute; case modeAuto: lcd.setCursor(4, 2); lcd.print(tempAuto,1); lcd.print((char)0); lcd.print(F(" auto>")); if (myHour < 10) { lcd.print(F("0")); } lcd.print(myHour, DEC); lcd.print(F(":")); if (myMinute < 10) { lcd.print(F("0")); } lcd.print(myMinute, DEC); break; case modeManual: lcd.setCursor(4, 2); lcd.print(tempManual,1); lcd.print((char)0); lcd.print(F(" man.>")); nextInterval(myHour, myMinute); if (myHour < 10) { lcd.print(F("0")); } lcd.print(myHour, DEC); lcd.print(F(":")); if (myMinute < 10) { lcd.print(F("0")); } lcd.print(myMinute, DEC); break; case modeHold: lcd.setCursor(4, 2); lcd.print(tempManual,1); lcd.print((char)0); lcd.print(F(" HOLD")); break; case modeInfoH: // first info screen lcd.setCursor(0, 0); lcd.print(F("Humidity:")); lcd.setCursor(0, 1); lcd.print(F("In=")); lcd.print(humidityIn, 1); lcd.print(F("%")); lcd.setCursor(10, 1); lcd.print(F("Out=")); lcd.print(humidityExt, 1); lcd.print(F("%")); lcd.setCursor(0, 2); lcd.print(F("Heat index:")); lcd.setCursor(0, 3); lcd.print(F("In=")); lcd.print(hic); lcd.print((char)0); lcd.setCursor(10, 3); lcd.print(F("Out=")); lcd.print(hicExt); lcd.print((char)0); break; case modeInfoUp: // second info screen lcd.setCursor(0, 0); lcd.print(F("Up ")); lcd.print(uptime()); lcd.setCursor(0, 1); lcd.print(F("RAM free ")); lcd.print(percentFreeRam()); lcd.print(F("%")); break; case modeInfoIp: // third info screen lcd.setCursor(0, 0); lcd.print(F("Network info: ")); dhcp ? lcd.print(F("DCHP")) : lcd.print(F("static")); lcd.setCursor(0, 1); lcd.print(F("IP ")); lcd.print(Ethernet.localIP()); lcd.setCursor(0, 2); lcd.print(F("Mask ")); lcd.print(Ethernet.subnetMask()); lcd.setCursor(0, 3); lcd.print(F("GW ")); lcd.print(Ethernet.gatewayIP()); break; case modeAbout: // easteregg :) for (int i=0; i<message .length(); i++) { lcd.clear(); lcd.setCursor(3,0); lcd.print(F("Cronotermostat")); lcd.setCursor(0,2); lcd.print(message.substring(i, i+20)); delay(300); } mode = modeReturn; break; } } void funcDisplayLastMode() { mode = modeReturn; } void noBacklight() { // todo Coralia - refactor lcd.noBacklight(); } void switchBack(long waitTime, unsigned long &timer, void (*function)()) { if ( timer != -1 && millis() - timer > waitTime) { // call parameter method (*function)(); timer = -1; } } int freeRam () { extern int __heap_start, *__brkval; int v; return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); } long percentFreeRam () { long freeR = freeRam(); return ( freeR * 100 ) / 8192; // for Uno/Nano: / 2048 } void lightOn() { timerLight = millis(); lcd.backlight(); } void pushTempPlus () { if (mode == modeAuto) { mode = modeManual; // if the current program is cooler than the confort temp, go directy to confort temp if (tempAuto < tempConfort) { tempManual = tempConfort; } else { tempManual = tempAuto + 0.5; } } else { tempManual = tempManual + 0.5; } } void pushTempMinus () { if (mode == modeAuto) { mode = modeManual; tempManual = tempAuto - 0.5; } else { tempManual = tempManual - 0.5; } } void pushHold () { if (mode == modeAuto) { mode = modeHold; tempManual = tempAuto; } else if (mode == modeManual) { mode = modeHold; } else if (tempAuto == tempManual) { //we already are in modeHold, so setureset to what it was before mode = modeAuto; } else { mode = modeManual; } } void getButton () { for (int i = 0; i < 6; i++) { // Update the Bounce instance buttons[i].update(); if (buttons[i].rose()) { if (i == 3) { button3Down = 0; } } if ( buttons[i].fell() ) { // If it fell, do the appropriate action if (i == 0) { //light lightOn(); logInfo("physical button 'light'"); } else if (i == 1) { // temp + if ( lightOnKeypress ) { lightOn(); } pushTempPlus(); logInfo("physical button 'temp+'"); } else if (i == 2) { // temp - if ( lightOnKeypress ) { lightOn(); } pushTempMinus(); logInfo("physical button 'temp-'"); } else if (i == 3) { // reset to auto + about if ( lightOnKeypress ) { lightOn(); } mode = modeAuto; tempManual = tempAuto; button3Down = millis();// start counting for long press logInfo("physical button 'reset'"); } else if (i == 4) { // mode hold if ( lightOnKeypress ) { lightOn(); } pushHold(); logInfo("physical button 'hold'"); } else if (i == 5) { // other info if ( lightOnKeypress ) { lightOn(); } switch (mode) { case modeAuto: case modeManual: case modeHold: modeReturn = mode; mode = modeInfoH; timerInfo = millis(); break; case modeInfoH: mode = modeInfoUp; timerInfo = millis(); break; case modeInfoUp: mode = modeInfoIp; timerInfo = millis(); break; case modeInfoIp: mode = modeReturn; break; } logInfo("physical button 'other info'"); } } } if (button3Down != 0 && (millis() - button3Down > buttonDownInterval) ) { modeReturn = mode; mode = modeAbout; timerInfo = millis(); button3Down = 0; logInfo("physical button 'reset' long"); } } String uptime() { // todo? rollover long up = millis(); long days = 0; long hours = 0; long mins = 0; mins = up / 1000 / 60; hours = mins / 60; days = hours / 24; mins = mins - (hours * 60); hours = hours - (days * 24); String uptime = ""; if (days > 0) { uptime += days; uptime += "d "; } uptime += hours; uptime += "h "; uptime += mins; uptime += "m "; return uptime; } void listStatFiles(EthernetClient client) { File workingDir = SD.open("/data/"); client.println(F("<ul>")); while(true) { File entry = workingDir.openNextFile(); if (! entry) { break; } client.print(F("<li><a href=\"/HC.htm?file=")); client.print(entry.name()); client.print(F("\">")); client.print(entry.name()); client.println(F("</a></li>")); entry.close(); } client.println(F("</ul>")); workingDir.close(); } void listLogFiles(EthernetClient client) { File workingDir = SD.open("/logs/"); client.println(F("<ul>")); while(true) { File entry = workingDir.openNextFile(); if (! entry) { break; } client.print(F("<li><a href=\"")); client.print(entry.name()); client.print(F("\">")); client.print(entry.name()); client.println(F("</a></li>")); entry.close(); } client.println(F("</ul>")); workingDir.close(); } // standard response header void httpOK(EthernetClient client, String type) { client.println(F("HTTP/1.1 200 OK")); client.println("Content-Type: text/"+type); client.println(F("Connection: close")); client.println(); if (type == "html") { client.println(F("< !DOCTYPE html>")); client.println(F("<link rel=\"icon\" href=\"data:;base64,=\"/>")); // avoid favicon requests } } // 404 response header void http404(EthernetClient client) { client.println(F("HTTP/1.1 404 Not Found")); client.println(F("Content-Type: text/plain")); client.println(); client.println(F("404 Not Found")); } void writeSD(String logString, String filename) { // writes 'logString' to 'filename' on SD card File dataFile = SD.open(filename, FILE_WRITE); if (!dataFile) { Serial.print(F("error opening ")); Serial.println(filename); } else { dataFile.println(logString); dataFile.close(); } } void logInfo(String logString) { // writes messages to console and to the .log file File dataFile = SD.open(systemLogFilename, FILE_WRITE); if (!dataFile) { Serial.print(F("error opening ")); Serial.println(systemLogFilename); } else { String tempLog = ""; char fullDateAndTime [20]; sprintf (fullDateAndTime, "%04u.%02u.%02u %02u:%02u:%02u", year(), month(), day(), hour(), minute(), second()); tempLog += fullDateAndTime; tempLog += " "; tempLog += now(); tempLog += " "; tempLog += logString; dataFile.println(tempLog); dataFile.close(); Serial.println(tempLog); } } // sync with NTP server // send an NTP request to the time server at the given address void sendNTPpacket(char* address) { // set all bytes in the buffer to 0 memset(packetBuffer, 0, NTP_PACKET_SIZE); // Initialize values needed to form NTP request // (see URL above for details on the packets) packetBuffer[0] = 0b11100011; // LI, Version, Mode packetBuffer[1] = 0; // Stratum, or type of clock packetBuffer[2] = 6; // Polling Interval packetBuffer[3] = 0xEC; // Peer Clock Precision // 8 bytes of zero for Root Delay & Root Dispersion packetBuffer[12] = 49; packetBuffer[13] = 0x4E; packetBuffer[14] = 49; packetBuffer[15] = 52; // all NTP fields have been given values, now // you can send a packet requesting a timestamp: Udp.beginPacket(address, 123); //NTP requests are to port 123 Udp.write(packetBuffer, NTP_PACKET_SIZE); Udp.endPacket(); } String displayAddress(IPAddress address) { return String(address[0]) + "." + String(address[1]) + "." + String(address[2]) + "." + String(address[3]); } //for AJAX display SET temperature void GetTemp(EthernetClient client) { client.print(F("<strong>Set at: </strong>")); if ( mode == modeAuto ){ client.print(tempAuto, 1); } if ( mode == modeManual || mode == modeHold ){ client.print(tempManual, 1); } client.println(F(" °C <br /><br />")); client.print(F("<strong>Relay: </strong>")); if (relay) { client.print(F("☀ ON ☀")); } else { client.print(F("OFF")); } client.print(F("<br /><br /><strong>Program: </strong>")); if ( mode == modeAuto ){ client.print(F("auto until ")); int myHour, myMinute; nextInterval(myHour, myMinute); if (myHour < 10) { client.print(F("0")); } client.print(myHour, DEC); client.print(F(":")); if (myMinute < 10) { client.print(F("0")); } client.println(myMinute, DEC); } if ( mode == modeManual){ client.print(F("manual until ")); int myHour, myMinute; nextInterval(myHour, myMinute); if (myHour < 10) { client.print(F("0")); } client.print(myHour, DEC); client.print(F(":")); if (myMinute < 10) { client.print(F("0")); } client.println(myMinute, DEC); } if (mode == modeHold ){ client.print(F("HOLD")); } } void setup() { Wire.begin(); Serial.begin(9600); pinMode(LED_BUILTIN, OUTPUT); digitalWrite(LED_BUILTIN, LOW); digitalWrite(relayPort, HIGH); //to avoid bouncing at startup pinMode(relayPort, OUTPUT); pinMode(2, OUTPUT); pinMode(53, OUTPUT); //needed for the network card setSyncProvider(RTC.get); // get the time from the RTC // set the initial time for RTC: // setTime(hours, minutes, seconds, days, months, years); // setTime(23, 42, 0, 4, 4, 2018); lcd.begin(20, 4); if ( prod ) { lcd.noBacklight(); } else { lcd.backlight(); } lcd.createChar(0, degree); lcd.createChar(1, flame); dht.begin(); dhtExt.begin(); for (int i = 0; i < 6; i++) { buttons[i].attach( BUTTON_PINS[i] , INPUT_PULLUP ); //setup the bounce instance for the current button buttons[i].interval(25); // interval in ms } Serial.println(F("Initializing SD card...")); if (!SD.begin(chipSelect)) { Serial.println(F("SD card initialization failed!")); return; } logInfo("SD card initialization done"); if (dhcp == 0) { Ethernet.begin(mac,ip,dns,gateway,subnet); // initialize Ethernet device with fixed address } else { Ethernet.begin(mac); // initialize Ethernet device with DHCP } server.begin(); // start to listen for clients logInfo("Server started"); String tempIP = "IP address "; dhcp ? tempIP += "(DHCP): " : tempIP += "(static): "; tempIP += displayAddress(Ethernet.localIP()); logInfo(tempIP); tempIP = "Subnet mask: "; tempIP += displayAddress(Ethernet.subnetMask()); logInfo(tempIP); tempIP = "Gateway: "; tempIP += displayAddress(Ethernet.gatewayIP()); logInfo(tempIP); Udp.begin(localPort); // for NTP lightOn(); // light up once at startup delay(2000); // read DHT sensors, enable in prod } void loop() { // Reading temperature or humidity takes about 250 milliseconds // Sensor readings may also be up to 2 seconds 'old' // Read temperature as Celsius (the default) temp = dht.readTemperature(); tempExt = dhtExt.readTemperature(); humidityIn = dht.readHumidity(); humidityExt = dhtExt.readHumidity(); char yearMonth [8]; sprintf (yearMonth, "%04u-%02u", year(), month()); systemLogFilename = String ("logs/") + yearMonth + String(".log"); temperatureLogFilename = String ("data/") + yearMonth + String(".csv"); // regularly write temps to SD card unsigned long currentMillis = millis(); if ( currentMillis - previousMillis >= writeTempInterval ) { previousMillis = currentMillis; String tempLog = ""; tempLog += now(); tempLog += ","; tempLog += (temp); tempLog += ","; tempLog += (tempExt); writeSD(tempLog, temperatureLogFilename); } //NTP sync once a day if (day() != dayOld) { dayOld = day(); logInfo("Trying to sync the RTC..."); sendNTPpacket(timeServer); // send an NTP packet to a time server // wait to see if a reply is available delay(1000); if (Udp.parsePacket()) { // We've received a packet, read the data from it Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer // the timestamp starts at byte 40 of the received packet and is four bytes, // or two words, long. First, extract the two words: unsigned long highWord = word(packetBuffer[40], packetBuffer[41]); unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]); // combine the four bytes (two words) into a long integer // this is NTP time (seconds since Jan 1 1900): unsigned long secsSince1900 = highWord < < 16 | lowWord; // Unix time starts on Jan 1 1970. In seconds, that's 2208988800: const unsigned long seventyYears = 2208988800UL; // subtract seventy years: unsigned long epoch = secsSince1900 - seventyYears; epoch += (3 * 3600L); // adjust for GMT+3 epoch -= 1; // adjust for the delay above String logNTP = "RTC adjusted by "; int difference = epoch-now(); //was unsigned logNTP += difference; logNTP += (" seconds"); logInfo (logNTP); RTC.set(epoch); } Ethernet.maintain(); } // Check if any reads failed and exit early (to try again). if (isnan(humidityIn) || isnan(temp)) { logInfo("Failed to read from DHT sensor!"); return; } if (isnan(humidityExt) || isnan(tempExt)) { logInfo("Failed to read from outside DHT sensor!"); // return; } // Compute heat index in Celsius (isFahreheit = false) hic = dht.computeHeatIndex(temp, humidityIn, false); hicExt = dhtExt.computeHeatIndex(tempExt, humidityExt, false); previousMinutes = totalMinutes; totalMinutes = hour() * 60 + minute(); //main code switch (mode) { case modeAuto: compareTemperatureAuto(timeInterval[0], timeInterval[1], tempInterval[0]); compareTemperatureAuto(timeInterval[1], timeInterval[2], tempInterval[1]); compareTemperatureAuto(timeInterval[2], timeInterval[3], tempInterval[2]); compareTemperatureAuto(timeInterval[3], timeInterval[0], tempInterval[3]); break; case modeManual: if (temp <= (tempManual - hysteresis) ) { relay = 1; } else if (temp >= (tempManual + hysteresis) ) { relay = 0; } if ((totalMinutes != previousMinutes) && ( totalMinutes == timeInterval[0] || totalMinutes == timeInterval[1] || totalMinutes == timeInterval[2] || totalMinutes == timeInterval[3])) { mode = modeAuto; } break; case modeHold: if (temp < = (tempManual - hysteresis) ) { relay = 1; } else if (temp >= (tempManual + hysteresis) ) { relay = 0; } break; } //function to display mode & target temperature displayMode (); getButton(); switchBack(displayTime, timerInfo, funcDisplayLastMode); switchBack(lightTime, timerLight, *noBacklight); if (mode == modeManual && tempManual == tempAuto) { mode = modeAuto; } if (mode != modeOld) { lcd.clear(); modeOld = mode; switch (mode) { // log the mode change case 0: logInfo("Mod AUTO"); break; case 1: logInfo("Mod MANUAL"); break; case 2: logInfo("Mod HOLD"); break; case 3: logInfo("Mod INFO humidity"); break; case 4: logInfo("Mod INFO uptime and RAM"); break; case 5: logInfo("Mod INFO IP"); break; case 6: logInfo("Mod ABOUT"); break; } } if (relay == 0) { digitalWrite(relayPort, HIGH); } else if (relay == 1) { digitalWrite(relayPort, LOW); } if (relay != relayOld) { // log the relay change relay ? logInfo("Relay ON") : logInfo("Relay OFF"); relayOld = relay; } tempManual = constrain(tempManual, tempMin, tempMax); EthernetClient client = server.available(); // look for the client // webserver if (client) { // got client? String response=""; while (client.connected()) { if (client.available()) { char c=client.read(); Serial.write(c); if (c=='\n') { // end of the first line break; } response+=c; } } //only log server responses if it's not an ajax query if ( response.indexOf("ajax_text") < 0 ) { logInfo(response); } if (response.startsWith("GET /stat?secret=" + secret)) { httpOK(client, "html"); //standard response header client.println(F("<h2>List of files:")); listStatFiles(client); } else if (response.startsWith("GET /logs?secret=" + secret)) { httpOK(client, "html"); //standard response header client.println(F("<h2>List of files:</h2>")); listLogFiles(client); } else if (response.indexOf("file=") > 0 && response.indexOf(".LOG") < 0) { String filename; int slash = response.indexOf('/'); filename = response.substring(slash+1, slash+7); File file = SD.open(filename,FILE_READ); if (!file) { http404(client); } httpOK(client, "html"); //standard response header while(file.available()) { int num_bytes_read; uint8_t byte_buffer[32]; num_bytes_read=file.read(byte_buffer,32); client.write(byte_buffer,num_bytes_read); } file.close(); } // feed CSV files requested by HC.htm else if (response.indexOf("file=") < 0 && response.indexOf(".CSV") > 0) { String filename; int slash = response.indexOf('/'); filename = "data/" + response.substring(slash+1, slash+12); File file = SD.open(filename,FILE_READ); if (!file) { http404(client); } httpOK(client, "html"); //standard response header while(file.available()) { int num_bytes_read; uint8_t byte_buffer[32]; num_bytes_read=file.read(byte_buffer,32); client.write(byte_buffer,num_bytes_read); } file.close(); } // feed LOG files else if ( response.indexOf(".LOG") > 0) { String filename; int slash = response.indexOf('/'); filename = "logs/" + response.substring(slash+1, slash+12); File file = SD.open(filename,FILE_READ); if (!file) { http404(client); } httpOK(client, "plain"); //standard response header while(file.available()) { int num_bytes_read; uint8_t byte_buffer[32]; num_bytes_read=file.read(byte_buffer,32); client.write(byte_buffer,num_bytes_read); } file.close(); } else if (response.indexOf("ajax_text") > -1) { GetTemp(client); } else if (response.startsWith("GET /crono?secret=" + secret)) { httpOK(client, "html"); //standard response header client.println(F("<html>")); client.println(F("<head>")); client.println(F("<title>Cronotermostat</title>")); client.println(F("<script>")); client.println("function GetTemp() {"); client.println("nocache = \"&nocache=\"\ + Math.random() * 1000000;"); client.println("var request = new XMLHttpRequest();"); client.println("request.onreadystatechange = function() {"); client.println("if (this.readyState == 4) {"); client.println("if (this.status == 200) {"); client.println("if (this.responseText != null) {"); client.println("document.getElementById(\"ajax_div\")\ .innerHTML = this.responseText;"); client.println("}}}}"); client.println( "request.open(\"GET\", \"ajax_text\" + nocache, true);"); client.println("request.send(null);"); client.println("setTimeout('GetTemp()', 1000);"); client.println("}"); client.println("</script>"); client.println("</head>"); client.println("<body onload=\"GetTemp()\">"); //temperature client.print(F("<table><tr><td colspan=\"2\"><strong>Temperature:</strong></td></tr><tr><td><strong>In = ")); client.print(temp,1); client.print(F(" °C </strong>     ")); client.print(F("</td><td>Out = ")); client.print(tempExt,1); client.print(F(" °C")); client.println(F("</td></tr>")); //humidity client.print(F("<tr><td colspan=\"2\"><strong>Humidity:</strong></td></tr><tr><td>In: ")); client.print(humidityIn, 1); client.print(F(" %</td><td>Out: ")); client.print(humidityExt, 0); client.println(F(" %</td></tr>")); client.print(F("<tr><td colspan=\"2\"><strong>Heat index:</strong></td></tr><tr><td>In: ")); client.print(hic); client.print(F("</td><td>Out: ")); client.print(hicExt); client.println(F("</td></tr><tr><td colspan=\"2\"> </td></tr></table>")); //mode & next interval client.print(F("<div id=\"ajax_div\">Loading...</div>")); // buttons client.print(F("<br /><br /><input type=submit value=Plus style=width:80px;height:25px onClick=location.href='/crono?secret=")); client.print(secret); client.println(F("?tempPlus;'/>  ")); client.print(F("<input type=submit value=Minus style=width:80px;height:25px onClick=location.href='/crono?secret=")); client.print(secret); client.println(F("?tempMinus;'/>  ")); client.print(F("<input type=submit value=Reset style=width:80px;height:25px onClick=location.href='/crono?secret=")); client.print(secret); client.println(F("?reset;'/>  ")); client.print(F("<input type=submit value=Hold style=width:80px;height:25px onClick=location.href='/crono?secret=")); client.print(secret); client.println(F("?hold;'/>")); client.print(F("<br /><br /><a href=\"./stat?secret=")); client.print(secret); client.println(F("\" target=_blank>Statistics</a>")); client.print(F("    <a href=\"./logs?secret=")); client.print(secret); client.println(F("\" target=_blank>Logs</a>")); // program table client.print(F("<br /><br />Program: <br />")); client.print(F("<table><tr><td>")); client.print(timeInterval[0] / 60); client.print(F(":")); if ( timeInterval[0] % 60 < 10 ){ client.print(F("0")); } client.print(timeInterval[0] % 60); client.print(F("</td></td><td></td><td>")); client.print(timeInterval[1] / 60); client.print(F(":")); if ( timeInterval[1] % 60 < 10 ){ client.print(F("0")); } client.print(timeInterval[1] % 60); client.print(F("</td></td><td></td><td>")); client.print(timeInterval[2] / 60); client.print(F(":")); if ( timeInterval[2] % 60 < 10 ){ client.print(F("0")); } client.print(timeInterval[2] % 60); client.print(F("</td></td><td></td><td>")); client.print(timeInterval[3] / 60); client.print(F(":")); if ( timeInterval[3] % 60 < 10 ){ client.print(F("0")); } client.print(timeInterval[3] % 60); client.print(F("</td></td><td></td></tr><tr><td></td><td>")); client.print(tempInterval[0]); client.print(F("°</td><td></td><td>")); client.print(tempInterval[1]); client.print(F("°</td><td></td><td>")); client.print(tempInterval[2]); client.print(F("°</td><td></td><td>")); client.print(tempInterval[3]); client.println(F("°</td></tr></table>")); // Clock and date client.print(F("<br /><br />It's ")); char hourMinute [6]; sprintf (hourMinute, "%02u:%02u", hour(), minute()); client.print(hourMinute); client.print(F("   ")); char dayMonthYear [11]; sprintf (dayMonthYear, "%02u.%02u.%04u", day(), month(), year()); client.print(dayMonthYear); // uptime & RAM client.print(F("<br /><br />Up ")); client.println(uptime()); client.print(F("<br /><br />RAM ")); client.print(percentFreeRam()); client.println(F("% free<br /><br />")); client.println(F("</body>")); client.println(F("</html>")); } else { http404(client); } delay(1); client.stop(); if(response.indexOf("tempPlus") > 0) { //temp + pushTempPlus(); logInfo("web button 'temp+'"); } if(response.indexOf("tempMinus") > 0) { //temp - pushTempMinus(); logInfo("web button 'temp-'"); } if(response.indexOf("reset") > 0) { //reset mode = modeAuto; tempManual = tempAuto; logInfo("web button 'reset'"); } if(response.indexOf("hold") > 0) { //hold pushHold(); logInfo("web button 'hold'"); } response=""; //clearing string for next read } }The most recent version of the code is found on GitHub
A simple circuit and software that checks every 12 hours if there is water is the pot tray and if it’s not it starts a pump for 6 seconds.
The water sensor is a 1 MΩ resistor.
What’s left to do:
The code:
/* Copyright © 2018 Razvan Murariu <razwww@gmail.com> This program is free software. It comes without any warranty, to the extent permitted by applicable law. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See the COPYING file for more details. The circuit: Water pump: D7 Sensor (1 MO resistor): A0 */ #include <LowPower.h> #define sensorPin A0 byte pumpPin=4; int tempo=6000; //watering time int i=0; //counter int readSensor() { byte readCount = 0; int sensorValueTotal = 0; int sensorValueAveraged = 0; digitalWrite(sensorPin,HIGH); // to avoid electrocorrosion we set it to high only during measuring while (readCount < 5) { int sensorValue = analogRead(sensorPin); // Serial.println(sensorValue); sensorValueTotal += sensorValue; readCount++; delay(10); } sensorValueAveraged = sensorValueTotal / 5; digitalWrite(sensorPin,LOW); // Serial.println(sensorValueAveraged); return (sensorValueAveraged); } void setup() { Serial.begin(9600); pinMode(pumpPin,OUTPUT); pinMode(sensorPin,INPUT); pinMode(13,OUTPUT); digitalWrite(13,LOW); //turn off led digitalWrite(pumpPin,LOW); //turn off pump } void loop() { if( i==0 && readSensor()>900 ) { // dry=982 digitalWrite(pumpPin,HIGH); delay(tempo); digitalWrite(pumpPin,LOW); // Serial.println("pompa"); } i++; // Enter power down state for X s with ADC and BOD module disabled LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF); if( i==5400 ) { // 10800 = once per day i=0; // reset i } }The most recent version of the code is found on GitHub
This counts and displays on an LCD the number of times someone/something (of course it can be used to count anything, not only cats 🙂 ) approaches within 12 cm from the sensor. Also the back light is turned on for 5 seconds after the initial approach.
After the event all approaches are ignored for the next 2 minutes.
If the button is pressed, the LCD backlight is turned on for 5 seconds.
BTW, my cat eats between 10 and 22 times per day and drinks water between 8 and 15 times per day 🙂
The code:
/* Copyright © 2018 Razvan Murariu <razwww@gmail.com> This program is free software. It comes without any warranty, to the extent permitted by applicable law. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See the COPYING file for more details. The circuit: Arduino Nano trigPin: A1 echoPin: A0 display SCL: A4 display SDA: A5 button (NC): between 5V and D2 D2 pulled-down to ground with a 10 KΩ resistor */ #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); const long intervalEat = 120000; const long intervalLight = 5000; int distance = 12; long duration; int distanceCm; int counter = 0; int buttonState = 0; unsigned long previousMillisEat = 0; unsigned long previousMillisButton = 0; const int trigPin = A1; const int echoPin = A0; void setup() { lcd.begin(16,2); Serial.begin(9600); pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); pinMode(13, OUTPUT); pinMode(2, INPUT); // button for backlight lcd.setCursor(0,0); lcd.print("0 pisici"); lcd.backlight(); delay(intervalLight); lcd.noBacklight(); } void loop() { unsigned long currentMillis = millis(); delay(10); digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); distanceCm= duration*0.034/2; // distance smaller than 12 cm && (just powered on || intervalEat passed) if (distanceCm < distance && ((currentMillis < intervalEat && counter == 0) || (currentMillis - previousMillisEat >= intervalEat))) { previousMillisEat = currentMillis; counter++; Serial.print(distanceCm); Serial.println(" cm"); Serial.print(counter); Serial.println(" pisici"); Serial.println(currentMillis); lcd.backlight(); lcd.setCursor(0,0); lcd.print(counter); delay(intervalLight); lcd.noBacklight(); } buttonState = digitalRead(2); if (buttonState == LOW) { Serial.println("Buton"); lcd.backlight(); previousMillisButton = currentMillis; } if ( currentMillis - previousMillisButton >= intervalLight ) { lcd.noBacklight(); } }The most recent version of the code is found on GitHub
Din nou arbitru la Marathon 7500 organizat de CPNT Braşov, a zecea ediţie şi a cincea la care particip ca arbitru/voluntar 🙂
