Figure 7 : Installation du circuit imprim\u00e9 de l’enregistreur autonome final <\/p>\n\n\n\n
Code :<\/p>\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 : Essais<\/p>\n\n\n\n
Protocole :<\/p>\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\nEssai 1 : Cuisson d\u2019un Banana Bread au four \u00e9lectrique particulier<\/u><\/strong><\/p>\n\n\n\n Le 1er essai a \u00e9t\u00e9 fait avec la cuisson d\u2019un Banana Bread dans un four \u00e9lectrique particulier. Nous avons r\u00e9alis\u00e9 le graphique (figure).<\/p>\n\n\n\n
Pour cela, nous avons dispos\u00e9 2 thermocouples de type K dans le four, un dans le fond (courbe grise) et un pr\u00e8s de la porte (courbe jaune).<\/p>\n\n\n\n
Une fois le four chauff\u00e9, nous avons dispos\u00e9 une sonde dans le g\u00e2teau (courbe bleue claire) et l\u2019avons mis dans le four.<\/p>\n\n\n\n
Un dernier capteur est laiss\u00e9 sur le plan de travail, \u00e0 temp\u00e9rature ambiante de la cuisine (courbe bleue fonc\u00e9e).<\/p>\n\n\n\n
Apr\u00e8s la cuisson faite, je r\u00e9cup\u00e8re la carte SD, je la mets dans l\u2019ordinateur et r\u00e9cup\u00e8re les donn\u00e9es dans le dossier \u00ab records \u00bb.<\/p>\n\n\n\n
Je copie-colle les donn\u00e9es sur Excel (format texte CSV) puis je construits les courbes.<\/p>\n\n\n\nFigure 8 : Cycle de chauffe et de d\u00e9chauffe du four pour la cuisson d’un Banana Bread. <\/p>\n\n\n\n
Essai 2 : Cuisson de pains au four \u00e9lectrique particulier<\/u><\/strong><\/p>\n\n\n\n Le 2\u00e8me essai est celui de la cuisson de 2 pains dans un l\u00e8chefrite.<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Nous souhaitons cr\u00e9er ici un enregistreur de temp\u00e9ratures, avec quatre thermosondes de type K et un DHT22. Ce miniprojet s\u2019inscrit…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4779","post","type-post","status-publish","format-standard","hentry","category-en-cours"],"_links":{"self":[{"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/posts\/4779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/comments?post=4779"}],"version-history":[{"count":4,"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/posts\/4779\/revisions"}],"predecessor-version":[{"id":5571,"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/posts\/4779\/revisions\/5571"}],"wp:attachment":[{"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/media?parent=4779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/categories?post=4779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/miniprojets.net\/index.php\/wp-json\/wp\/v2\/tags?post=4779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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