Stap 5: Code
de sensor o/p op een webpagina weergeven, schreef ik een basaal script dat de sensorgegevens zal lezen en wordt weergegeven in een browser.
#include <ESP8266WiFi.h> #include<WiFiClient.h>#include <ESP8266WebServer.h>#include<ESP8266mDNS.h>#include <Wire.h>// HIH6130 I2C address is 0x27(39) #define Addr 0x27 const char* ssid = "NETGEAR34"; const char* password = "sillyviolet195"; ESP8266WebServer server ( 80 ); //////////////////////////////////////////////////////////////// void handleRoot() { char temp[400]; unsigned int data[4]; Wire.beginTransmission(Addr); // Select data register Wire.write(0x00); // Stop I2C Transmission Wire.endTransmission();</p><p> // Request 4 bytes of data Wire.requestFrom(Addr, 4);</p><p> // Read 4 bytes of data // humidity msb, humidity lsb, temp msb, temp lsb if (Wire.available() == 4) { data[0] = Wire.read(); data[1] = Wire.read(); data[2] = Wire.read(); data[3] = Wire.read(); }</p><p> // Convert the data to 14-bits int humidity = ((((data[0] & 0x3F) * 256) + data[1]) * 100.0) / 16383.0; int temp1 = ((data[2] * 256) + (data[3] & 0xFC)) / 4; int cTemp = (temp1 / 16384.0) * 165.0 - 40.0; int fTemp = cTemp * 1.8 + 32;</p><p> // Output data to serial monitor Serial.print("Relative Humidity :"); Serial.print(humidity); Serial.println(" %RH"); Serial.print("Temperature in Celsius :"); Serial.print(cTemp); Serial.println(" C"); Serial.print("Temperature in Fahrenheit :"); Serial.print(fTemp); Serial.println(" F"); delay(500);</p><p> snprintf ( temp, 400,</p><p>" \ \ \ </p><p>\ </p><p>\ </p><p>\ \ </p><h1>Weather Monitoring using ESP8266</h1><p>\ </p><h1>HIH6130 I2C sensor mini Module</h1><p>\ </p><p>fTemp_cTemp_Humidity: %02d:%02d:%02d</p><p>\ </p><p>\ </p><p>",</p><p> fTemp, cTemp, humidity ); server.send ( 200, "text/html", temp ); } ///////////////////////////////////////////////////////////////// void handleNotFound() { String message = "File Not Found\n\n"; message += "URI: "; message += server.uri(); message += "\nMethod: "; message += ( server.method() == HTTP_GET ) ? "GET" : "POST"; message += "\nArguments: "; message += server.args(); message += "\n";</p><p> for ( uint8_t i = 0; i < server.args(); i++ ) { message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n"; }</p><p> server.send ( 404, "text/plain", message ); }</p><p>void setup ( void ) { Wire.begin(2,14); Serial.begin ( 115200 ); WiFi.begin ( ssid, password ); Serial.println ( "" );</p><p> // Wait for connection while ( WiFi.status() != WL_CONNECTED ) { delay ( 500 ); Serial.print ( "." ); }</p><p> Serial.println ( "" ); Serial.print ( "Connected to " ); Serial.println ( ssid ); Serial.print ( "IP address: " ); Serial.println ( WiFi.localIP() );</p><p> if ( MDNS.begin ( "esp8266" ) ) { Serial.println ( "MDNS responder started" ); }</p><p> server.on ( "/", handleRoot );</p><p> server.onNotFound ( handleNotFound ); server.begin(); Serial.println ( "HTTP server started" ); }</p><p>void loop ( void ) { server.handleClient(); }</p>
