El archivo de instrucciones se presenta en tres secciones o pesta\u00f1as. La primera contiene la declaraci\u00f3n de variables, la parte de configuraci\u00f3n y el lazo principal. Las siguientes dos secciones son procedimientos para preparaci\u00f3n de trama y lectura de sensor.<\/p>\n\n\n\n
El valor de temperatura se almacena en tipo real (float) que usa 4 bytes. En la trama se separan los bytes en orden LSB (Byte menos significativo primero, detalle que hay que recordar para decodificar en ChirpStack.<\/p>\n\n\n
\n unsigned char *puc;\n puc = (unsigned char *)(&temperaturaC);\n appDataSize = 8;\/\/AppDataSize max value is 64\n appData[0] = puc[0];\n appData[1] = puc[1];\n appData[2] = puc[2];\n appData[3] = puc[3];\n<\/pre><\/div>\n\n\nDe utilizar el mismo formato para el valor de Humedad, el formato es muy semejante.<\/p>\n\n\n\n
Intrucciones Principales<\/h2>\n\n\n\n \/*\n * HelTec Automation(TM) LoRaWAN 1.0.2 OTAA example use OTAA, CLASS A\n * Solo ESP32+LoRa series boards con licencia http: \/ \/www.heltec.cn \/search \/);\n *https: \/ \/github.com \/HelTecAutomation \/ESP32_LoRaWAN\n* \/\n#include <ESP32_LoRaWAN.h>\n#include "Arduino.h"\n#include <DHT.h>\n\n \/*licencia Heltec ESP32 LoRaWan http: \/ \/resource.heltec.cn \/search * \/\nuint32_t license[4] = {0xBE21335B, 0xAEC3C5CE, 0xCC0A1CF4, 0xB836F981};\n\n \/* OTAA parametros* \/\nuint8_t DevEui[] = { 0x01, 0x20, 0x08, 0x93, 0xdf, 0x80, 0x37, 0x74 };\nuint8_t AppEui[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };\nuint8_t AppKey[] = { 0x05, 0x8e, 0xeb, 0xff, 0x24, 0xf1, 0x01, 0x84, 0xd0, 0x07, 0xbe, 0xd4, 0x65, 0xe7, 0x6b, 0xb5 };\n\n \/* ABP parametros* \/\nuint32_t DevAddr = ( uint32_t )0x0174b1fd;\nuint8_t NwkSKey[] = { 0xc1, 0x45, 0x31, 0x28, 0x5f, 0xb2, 0x56, 0x3b, 0x9d, 0x5f, 0x27, 0x15, 0xed, 0x3a, 0x0e, 0xbc}; \nuint8_t AppSKey[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};\n\n \/ \/LoraWan channelsmask, default channels 0-7 \/\nuint16_t userChannelsMask[6]={ 0x00FF,0x0000,0x0000,0x0000,0x0000,0x0000 };\n\nDeviceClass_t loraWanClass = CLASS_A; \/*Soporte de A and C* \/\nuint32_t appTxDutyCycle = 300000; \/*15000; en [ms]* \/\nbool overTheAirActivation = true; \/*OTAA or ABP* \/\nbool loraWanAdr = true; \/*ADR enable* \/\nbool isTxConfirmed = true; \/*confirmed or unconfirmed messages * \/\nuint8_t appPort = 2; \/* Application port * \/\n\n \/* reintentos de transmisi\u00f3n, en caso de no recibir ack * \/\nuint8_t confirmedNbTrials = 8;\n\n \/* Seleccionado de Arduino IDE tools * \/\nuint8_t debugLevel = LoRaWAN_DEBUG_LEVEL; \nLoRaMacRegion_t loraWanRegion = ACTIVE_REGION;\n\n \/ \/ variables de sensor \/actuador\nuint8_t contador = 0; \nfloat humedad = 0;\nfloat temperaturaC = 0;\nfloat temperaturaF = 0;\n\n \/ \/ Mensajes por Puerto Serial\nvolatile boolean serial_msg = true;\n\n \/ \/ Sensor humedad y temperatura\n#define DHTPIN 4\n#define DHTTYPE DHT11\nDHT dht(DHTPIN, DHTTYPE);\n\nvoid setup(){\n if (serial_msg){\n Serial.begin(115200);\n while (!Serial);\n }\n SPI.begin(SCK,MISO,MOSI,SS);\n Mcu.init(SS,RST_LoRa,DIO0,DIO1,license);\n deviceState = DEVICE_STATE_INIT;\n\n \/ \/ SENSOR Temperatura&Humedad\n dht.begin();\n}\nvoid loop(){\n \n switch( deviceState ) {\n case DEVICE_STATE_INIT: {\n LoRaWAN.init(loraWanClass,loraWanRegion);\n break;\n }\n case DEVICE_STATE_JOIN: {\n LoRaWAN.join();\n break;\n }\n case DEVICE_STATE_SEND: { \n prepareTxFrame( appPort );\n LoRaWAN.send(loraWanClass);\n deviceState = DEVICE_STATE_CYCLE;\n break;\n \n }\n case DEVICE_STATE_CYCLE: {\n \/ \/ Schedule next packet transmission\n txDutyCycleTime = appTxDutyCycle + randr( -APP_TX_DUTYCYCLE_RND,\n APP_TX_DUTYCYCLE_RND );\n LoRaWAN.cycle(txDutyCycleTime);\n deviceState = DEVICE_STATE_SLEEP;\n break;\n }\n case DEVICE_STATE_SLEEP: {\n LoRaWAN.sleep(loraWanClass,debugLevel);\n break;\n }\n default: {\n deviceState = DEVICE_STATE_INIT;\n break;\n }\n }\n}\n<\/pre><\/div>\n\n\nPreparaci\u00f3n de trama<\/h2>\n\n\n\n\/\/ Trama - integra datos\nstatic void prepareTxFrame( uint8_t port ){\n contador = contador + 1;\n \/\/ Sensor de Temperatura y Humedad\n SensorTempHum();\n\n if (isnan(humedad) || isnan(temperaturaC) || isnan(temperaturaF)) {\n humedad = 0;\n temperaturaC = 0;\n temperaturaF = 0;\n }\n unsigned char *puc;\n puc = (unsigned char *)(&temperaturaC);\n appDataSize = 8;\/\/AppDataSize max value is 64\n appData[0] = puc[0];\n appData[1] = puc[1];\n appData[2] = puc[2];\n appData[3] = puc[3];\n\n puc = (unsigned char *)(&humedad);\n appData[4] = puc[0];\n appData[5] = puc[1];\n appData[6] = puc[2];\n appData[7] = puc[3];\n if (serial_msg){\n Serial.print("tx: "+String(temperaturaC)+" ");\n Serial.print(appData[0]);\n Serial.print(appData[1]);\n Serial.print(appData[2]);\n Serial.println(appData[3]);\n Serial.print("tx: "+String(humedad)+" ");\n Serial.print(appData[4]);\n Serial.print(appData[5]);\n Serial.print(appData[6]);\n Serial.println(appData[7]);\n }\n}\n<\/pre><\/div>\n\n\nLectura de sensor<\/h2>\n\n\n\nvoid SensorTempHum(){\n \/\/ SENSOR Temperatura&Humedad\n dht.begin(); \/\/ regresa de sleep\n delay(2000); \/\/ espera minina entre lecturas de sensor\n humedad = dht.readHumidity();\n temperaturaC = dht.readTemperature();\n temperaturaF = dht.readTemperature(true);\n\n if (isnan(humedad) || isnan(temperaturaC) || isnan(temperaturaF)) {\n if (serial_msg){\n Serial.println(F("Failed to read from DHT sensor!"));\n }\n \/\/ espera minina entre lecturas de sensor\n delay(100); \n return;\n }\n\n float hif = dht.computeHeatIndex(temperaturaF, humedad);\n float hic = dht.computeHeatIndex(temperaturaC, humedad, false);\n\n if (serial_msg){\n Serial.print(F(" Humidity: "));\n Serial.print(humedad);\n Serial.print(F("% \\n Temperature: "));\n Serial.print(temperaturaC);\n Serial.print(F("\u00b0C "));\n Serial.print(temperaturaF);\n Serial.print(F("\u00b0F \\n Heat index: "));\n Serial.print(hic);\n Serial.print(F("\u00b0C "));\n Serial.print(hif);\n Serial.println(F("\u00b0F"));\n }\n}\n<\/pre><\/div>","protected":false},"excerpt":{"rendered":"El desarrollo del ejercicio se simplifica al tratarse como una extensi\u00f3n del ejemplo base de comunicaci\u00f3n Lora al que se a\u00f1ade el Sensor DHT11. ChirpStack - A\u00f1adir un dispositivo El archivo de instrucciones se presenta en tres secciones o pesta\u00f1as. La primera contiene la declaraci\u00f3n de variables, la parte de configuraci\u00f3n y el lazo principal. […]<\/p>\n","protected":false},"author":8043,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1465790],"tags":[],"class_list":["post-3405","post","type-post","status-publish","format-standard","hentry","category-lorawan-temperatura-humedad"],"_links":{"self":[{"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/posts\/3405","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/users\/8043"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/comments?post=3405"}],"version-history":[{"count":12,"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/posts\/3405\/revisions"}],"predecessor-version":[{"id":4900,"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/posts\/3405\/revisions\/4900"}],"wp:attachment":[{"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/media?parent=3405"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/categories?post=3405"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.espol.edu.ec\/girni\/wp-json\/wp\/v2\/tags?post=3405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}