Pile pour l\u2019horloge RTC<\/li>\n<\/ul>\n\n\n\nUtile pour avoir la date (jour et heure) exacte.<\/p>\n\n\n\n
Pile bouton RS PRO, 3 V Lithium Mangan\u00e8se Dioxyde, 30 mm CR3032 500 mAh<\/p>\n\n\n\n\nLogiciel IDE Arduino<\/li>\n<\/ul>\n\n\n\nPartie 3 : R\u00e9alisation finale<\/h2>\n\n\n\nSch\u00e9ma du c\u00e2blage<\/h3>\n\n\n\nSch\u00e9ma du circuit imprim\u00e9<\/h3>\n\n\n\nCircuit imprim\u00e9<\/h3>\n\n\n\nFigure 7 : Installation du circuit imprim\u00e9 de l’enregistreur autonome final <\/p>\n\n\n\n
Code sur IDE Arduino<\/h3>\n\n\n\n\/\/Biblioth\u00e8ques n\u00e9cessaires pour le fonctionnement du programme\n#include \"FS.h\" \/\/File System : permet de g\u00e9rer des fichiers, utile pour la carte SD\n#include \"SD.h\" \/\/Biblioth\u00e8que pour utiliser une carte SD : permet de lire les fichiers et \u00e9crire des donn\u00e9es dans la carte SD\n#include \"SPI.h\" \/\/Active la communication SPI (Serial Peripherical Interface). Protocole pour communiquer avec la carte SD et les capteurs \n#include \"max6675.h\" \/\/Biblioth\u00e8que pour le module MAX6675 et thermocouple K\n#include \"RTClib.h\" \/\/Biblioth\u00e8que pour les modules d\u2019horloge temps r\u00e9el (RTC) et permettre d\u2019obtenir la date et l\u2019heure en temps r\u00e9el\n#include \"DHT.h\" \/\/Biblioth\u00e8que pour le capteur DHT22 (temp\u00e9ratures et humidit\u00e9 ambiantes)\n\nRTC_DS1307 rtc;\n\nchar daysOfTheWeek[7][12] = { \"Sunday\", \"Monday\", \"Tuesday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\" };\n\nSPIClass spiSD(HSPI);\n#define SD_CS 5 \/\/ MAX6675 CS@27\n\n\/\/D\u00e9finition du c\u00e2blage pour relier les thermocouples au module ESP-WROOM-32\nint thermoDO = 19;\nint thermoCLK = 18;\nint thermoCS1 = 25;\nint thermoCS2 = 26;\nint thermoCS3 = 27;\nint thermoCS4 = 33;\n\n\/\/Connexion des thermocouples aux modules MAX6675\nMAX6675 thermocouple1(thermoCLK, thermoCS1, thermoDO);\nMAX6675 thermocouple2(thermoCLK, thermoCS2, thermoDO);\nMAX6675 thermocouple3(thermoCLK, thermoCS3, thermoDO);\nMAX6675 thermocouple4(thermoCLK, thermoCS4, thermoDO);\n\nFile myFile;\n#define DHTPIN 32\n#define DHTTYPE DHT22\n\nDHT dht(DHTPIN, DHTTYPE);\n\n\/*\nUncomment and set up if you want to use custom pins for the SPI communication\n#define REASSIGN_PINS\nint sck = -1;\nint miso = -1;\nint mosi = -1;\nint cs = -1;\n*\/\n\n\/\/D\u00e9finition d\u2019une s\u00e9rie de fonctions pour traiter les dossiers\/fichiers sur la carte SD, qu\u2019on appelera dans notre programme \n\nvoid listDir(fs::FS &fs, const char *dirname, uint8_t levels) {\n Serial.printf(\"Listing directory: %s\\n\", dirname);\n\n File root = fs.open(dirname);\n if (!root) {\n Serial.println(\"Failed to open directory\");\n return;\n }\n if (!root.isDirectory()) {\n Serial.println(\"Not a directory\");\n return;\n }\n\/\/Permet d\u2019afficher le dossier demand\u00e9, de l\u2019ouvrir et de v\u00e9rifier s\u2019il existe\n\n File file = root.openNextFile();\n while (file) {\n if (file.isDirectory()) {\n Serial.print(\" DIR : \");\n Serial.println(file.name());\n if (levels) {\n listDir(fs, file.path(), levels - 1);\n }\n } else {\n Serial.print(\" FILE: \");\n Serial.print(file.name());\n Serial.print(\" SIZE: \");\n Serial.println(file.size());\n }\n file = root.openNextFile();\n }\n}\n\/\/Permet d\u2019explorer le fichier : ouvrir les dossiers et sous-dossiers, parcourt le contenu, sa taille\n\nvoid createDir(fs::FS &fs, const char *path) {\n Serial.printf(\"Creating Dir: %s\\n\", path);\n if (fs.mkdir(path)) {\n Serial.println(\"Dir created\");\n } else {\n Serial.println(\"mkdir failed\");\n }\n}\n\/\/Permet de cr\u00e9er un dossier sur la carte SD\n\nvoid removeDir(fs::FS &fs, const char *path) {\n Serial.printf(\"Removing Dir: %s\\n\", path);\n if (fs.rmdir(path)) {\n Serial.println(\"Dir removed\");\n } else {\n Serial.println(\"rmdir failed\");\n }\n}\n\/\/Permet de supprimer un dossier sur la carte SD\n\n\nvoid readFile(fs::FS &fs, const char *path) {\n Serial.printf(\"Reading file: %s\\n\", path);\n\n File file = fs.open(path);\n if (!file) {\n Serial.println(\"Failed to open file for reading\");\n return;\n }\n\n Serial.print(\"Read from file: \");\n while (file.available()) {\n Serial.write(file.read());\n }\n file.close();\n}\n\/\/Ouvre un fichier, tente de le lire et v\u00e9rifie s\u2019il existe, lit son contenu, affiche le contenu dans le moniteur s\u00e9rie et le ferme\n\n\nvoid writeFile(fs::FS &fs, const char *path, const char *message) {\n Serial.printf(\"Writing file: %s\\n\", path);\n\n File file = fs.open(path, FILE_WRITE);\n if (!file) {\n Serial.println(\"Failed to open file for writing\");\n return;\n }\n if (file.print(message)) {\n Serial.println(\"File written\");\n } else {\n Serial.println(\"Write failed\");\n }\n file.close();\n}\n\/\/Permet de cr\u00e9er un fichier, d\u2019\u00e9crire du texte \n\n\nvoid appendFile(fs::FS &fs, const char *path, const char *message) {\n Serial.printf(\"Appending to file: %s\\n\", path);\n\n File file = fs.open(path, FILE_APPEND);\n if (!file) {\n Serial.println(\"Failed to open file for appending\");\n return;\n }\n if (file.print(message)) {\n Serial.println(\"Message appended\");\n } else {\n Serial.println(\"Append failed\");\n }\n file.close();\n}\n\/\/Permet d\u2019enregistrer des mesures et de garder un historique (ouverture fichier, ajout d\u2019un texte, fermeture du fichier)\n\nvoid renameFile(fs::FS &fs, const char *path1, const char *path2) {\n Serial.printf(\"Renaming file %s to %s\\n\", path1, path2);\n if (fs.rename(path1, path2)) {\n Serial.println(\"File renamed\");\n } else {\n Serial.println(\"Rename failed\");\n }\n}\n\/\/Permet de renommer ou d\u00e9placer un fichier sur la carte SD\n\nvoid deleteFile(fs::FS &fs, const char *path) {\n Serial.printf(\"Deleting file: %s\\n\", path);\n if (fs.remove(path)) {\n Serial.println(\"File deleted\");\n } else {\n Serial.println(\"Delete failed\");\n }\n}\n\/\/Permet de supprimer un fichier sur la carte SD\n\nvoid testFileIO(fs::FS &fs, const char *path) {\n File file = fs.open(path);\n static uint8_t buf[512];\n size_t len = 0;\n uint32_t start = millis();\n uint32_t end = start;\n if (file) {\n len = file.size();\n size_t flen = len;\n start = millis();\n while (len) {\n size_t toRead = len;\n if (toRead > 512) {\n toRead = 512;\n }\n file.read(buf, toRead);\n len -= toRead;\n }\n end = millis() - start;\n Serial.printf(\"%u bytes read for %lu ms\\n\", flen, end);\n file.close();\n } else {\n Serial.println(\"Failed to open file for reading\");\n }\n\n file = fs.open(path, FILE_WRITE);\n if (!file) {\n Serial.println(\"Failed to open file for writing\");\n return;\n }\n\n size_t i;\n start = millis();\n for (i = 0; i < 2048; i++) {\n file.write(buf, 512);\n }\n end = millis() - start;\n Serial.printf(\"%u bytes written for %lu ms\\n\", 2048 * 512, end);\n file.close();\n}\n\/\/Permet de mesurer la vitesse de lecture\/\u00e9criture sur la carte SD\n\n\n\/\/Initialisation du programme \nvoid setup() {\n Serial.begin(115200);\n while (!Serial) { delay(10); }\n\/\/Initialisation du port s\u00e9rie \n\n#ifdef REASSIGN_PINS\n SPI.begin(sck, miso, mosi, cs);\n#endif\n\/\/Configuration SPI\n\n spiSD.begin(14, 12, 13, 5); \/\/CLK=14,MISO=12,MOSI=13,CS=5\n\/\/Configuration carte SD\n\n \/\/if(!SD.begin(cs)){ \/\/Change to this function to manually change CS pin\n if (!SD.begin(5, spiSD)) {\n Serial.println(\"Card Mount Failed\");\n return;\n }\n uint8_t cardType = SD.cardType();\n\n if (cardType == CARD_NONE) {\n Serial.println(\"No SD card attached\");\n return;\n }\n\n Serial.print(\"SD Card Type: \");\n if (cardType == CARD_MMC) {\n Serial.println(\"MMC\");\n } else if (cardType == CARD_SD) {\n Serial.println(\"SDSC\");\n } else if (cardType == CARD_SDHC) {\n Serial.println(\"SDHC\");\n } else {\n Serial.println(\"UNKNOWN\");\n }\n\n uint64_t cardSize = SD.cardSize() \/ (1024 * 1024);\n Serial.printf(\"SD Card Size: %lluMB\\n\", cardSize);\n \/*\n listDir(SD, \"\/\", 0);\n createDir(SD, \"\/mydir\");\n listDir(SD, \"\/\", 0);\n removeDir(SD, \"\/mydir\");\n listDir(SD, \"\/\", 2);\n writeFile(SD, \"\/hello.txt\", \"Hello \");\n appendFile(SD, \"\/hello.txt\", \"World!\\n\");\n readFile(SD, \"\/hello.txt\");\n deleteFile(SD, \"\/foo.txt\");\n renameFile(SD, \"\/hello.txt\", \"\/foo.txt\");\n readFile(SD, \"\/foo.txt\");\n testFileIO(SD, \"\/test.txt\");\n Serial.printf(\"Total space: %lluMB\\n\", SD.totalBytes() \/ (1024 * 1024));\n Serial.printf(\"Used space: %lluMB\\n\", SD.usedBytes() \/ (1024 * 1024));\n *\/\n\n\/\/Initialisation RTC\n if (!rtc.begin()) {\n Serial.println(\"Couldn't find RTC\");\n Serial.flush();\n while (1) delay(10);\n }\n\n\/\/v\u00e9rification fonctionnement de l\u2019horloge, r\u00e9glage de l\u2019heure et initialisation DHT22\n if (!rtc.isrunning()) {\n Serial.println(\"RTC is NOT running, let's set the time!\");\n \/\/ When time needs to be set on a new device, or after a power loss, the\n \/\/ following line sets the RTC to the date & time this sketch was compiled\n \/\/rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));\n \/\/ This line sets the RTC with an explicit date & time, for example to set\n \/\/ January 21, 2014 at 3am you would call:\n rtc.adjust(DateTime(2026, 5, 01, 6, 35, 00));\n }\n\n \/\/ When time needs to be re-set on a previously configured device, the\n \/\/ following line sets the RTC to the date & time this sketch was compiled\n \/\/ rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));\n \/\/ This line sets the RTC with an explicit date & time, for example to set\n \/\/ January 21, 2014 at 3am you would call:\n \/\/ rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));\n\n dht.begin();\n}\n\n\/\/Partie du programme qui tourne en boucle \nvoid loop() {\n DateTime now = rtc.now(); \/\/R\u00e9cup\u00e9ration date et heure actuelle\n\n Serial.print(now.year(), DEC);\n Serial.print('\/');\n Serial.print(now.month(), DEC);\n Serial.print('\/');\n Serial.print(now.day(), DEC);\n Serial.print(\" (\");\n Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);\n Serial.print(\") \");\n Serial.print(now.hour(), DEC);\n Serial.print(':');\n Serial.print(now.minute(), DEC);\n Serial.print(':');\n Serial.print(now.second(), DEC);\n Serial.println();\n\/\/Affichage date et heure \n\n float h = dht.readHumidity();\n \/\/ Read temperature as Celsius (the default)\n float t = dht.readTemperature();\n \/\/ Read temperature as Fahrenheit (isFahrenheit = true)\n \/\/ float f = dht.readTemperature(true);\n if (isnan(h) || isnan(t)) {\n Serial.println(F(\"Failed to read from DHT sensor!\"));\n return;\n }\n Serial.println(t);\n Serial.println(h);\n\/\/Affichage humidit\u00e9 (%) et temp\u00e9rature (\u00b0C)\n\n float t1 = thermocouple1.readCelsius();\n float t2 = thermocouple2.readCelsius();\n float t3 = thermocouple3.readCelsius();\n float t4 = thermocouple4.readCelsius();\n Serial.print(\"C1 = \");\n Serial.println(t1);\n Serial.print(\"C2 = \");\n Serial.println(t2);\n Serial.print(\"C3 = \");\n Serial.println(t3);\n Serial.print(\"C4 = \");\n Serial.println(t4);\n myFile = SD.open(\"\/records.txt\", FILE_APPEND);\n\/\/Ouverture du fichier \u00ab records \u00bb\n\n if (myFile) {\n Serial.print(\"Writing to records.txt...\");\n myFile.println((String(now.year())+\"\/\"+String(now.month())+\"\/\"+String(now.day())+\" \"+String(now.hour())+\":\"+String(now.minute())+\":\"+String(now.second())+ \" \" +String(h) + \",\" +String(t) + \",\" +String(t1) + \",\" + String(t2) + \",\" + String(t3) + \",\" + String(t4)).c_str());\n\/\/Ecriture : date heure humidit\u00e9 h, temp\u00e9rature t, t1, t2, t3, t4\n\n myFile.close(); \/\/ Sauvegarde les donn\u00e9es sur la carte SD\n Serial.println(\"done.\");\n } \n \/\/ Fermeture du fichier\nelse {\n \/\/ if the file didn't open, print an error:\n Serial.println(\"error opening hello.txt\");\n }\n\n \/\/ For the MAX6675 to update, you must delay AT LEAST 250ms between reads!\n delay(30000); \/\/ D\u00e9lai de 30 secondes entre les mesures\n}\n <\/code><\/pre>\n\n\n\nPartie 4 : Connecter le dispositif \u00e0 IDE Arduino<\/h2>\n\n\n\n\nBrancher l\u2019installation via un c\u00e2ble USB-B Micro<\/li>\n\n\n\n V\u00e9rifier que le port USB soit bien connect\u00e9 \u00e0 l\u2019IDE Arduino<\/li>\n<\/ul>\n\n\n\n\nT\u00e9l\u00e9verser le code<\/li>\n\n\n\n Ouvrir le Moniteur s\u00e9rie<\/li>\n\n\n\n V\u00e9rifier que le nombre de baud soit bien le m\u00eame que celui du programme (ici : 115200)<\/li>\n\n\n\n V\u00e9rifier que les mesures s\u2019affichent correctement et que les valeurs sont coh\u00e9rentes<\/li>\n<\/ul>\n\n\n\nRemarque : Pour le 1er essai, nous n\u2019avons pas mis la pile du RTC en place. Nous avons uniquement modifi\u00e9 la date et l\u2019heure dans le programme.<\/p>\n\n\n\n
\nV\u00e9rifier ensuite la cr\u00e9ation du fichier \u00ab records \u00bb et l\u2019enregistrement des donn\u00e9es<\/li>\n<\/ul>\n\n\n\nPartie 5 : Protocole<\/h2>\n\n\n\nHypoth\u00e8ses<\/h3>\n\n\n\n\nCompte tenu de l\u2019activit\u00e9 des boulangers, il nous para\u00eet important de mod\u00e9liser le cycle entier de la chauffe et de la d\u00e9chauffe du four. Selon le four utilis\u00e9, la d\u00e9chauffe permet de cuire certains produits (cuisson des brioches apr\u00e8s la cuisson du pain pour le four \u00e0 gueulards (chaleur descendante), et avant la cuisson du pain pour le four \u00e9lectrique) ;<\/li>\n\n\n\n Nous pouvons mod\u00e9liser le cycle de chauffe selon 3 phases : la chauffe du four, un plateau correspondant \u00e0 l\u2019inertie du four et \u00e0 la cuisson des pains, la d\u00e9chauffe du four ;<\/li>\n\n\n\n Nous pensons qu\u2019il est important de caract\u00e9riser la puissance du four en prenant en compte sa masse et la masse de pain cuite, plut\u00f4t que la puissance du four \u00e0 vide ;<\/li>\n\n\n\n De m\u00eame, il est pr\u00e9f\u00e9rable de comparer le rendement de la puissance de chauffe de la masse mise dans le four, plut\u00f4t que le rendement de la puissance du four \u00e0 vide.<\/li>\n<\/ul>\n\n\n\nCrit\u00e8res de caract\u00e9risation quantitatifs que l’on souhaite mesurer<\/h3>\n\n\n\n A partir des crit\u00e8res de caract\u00e9risation du four s\u00e9lectionn\u00e9s, de la d\u00e9finition des 3 syst\u00e8mes et les donn\u00e9es manquantes, nous souhaitons mesurer :
En entr\u00e9e, nous avons :
A partir de ces valeurs, nous calculerons et analyserons :
Mat\u00e9riel utilis\u00e9<\/h3>\n\n\n\n
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