Kenneth Adams / Mbed 2 deprecated Lab3

Lab3 - Pressure, temperature, and humidity sensors displayed on a webpage.

Dependencies:   EthernetNetIf NTPClient_NetServices GPS mbed HTTPServer SDFileSystem

main.cpp@0:dfd0841721d5, 2010-10-05 (annotated)

Committer:
kadams6
Date:
Tue Oct 05 19:34:40 2010 +0000
Revision:
0:dfd0841721d5

        

        
Who changed what in which revision?

        

            
                
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#include "mbed.h"





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//#define SD_FS





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#include "EthernetNetIf.h"





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#include "HTTPServer.h"





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#include "HTTPClient.h"





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#ifdef SD_FS





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#include "SDFileSystem.h"





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#endif





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#include "GPS.h"





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#include "NTPClient.h"





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#include "SCP1000.h"





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#include "PachubeClient.h"





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#include "main.h"





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/***********





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 *   I/O   *





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 ***********/





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DigitalOut listenStatus(LED1);          // Blink when HTTP server is listening





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DigitalOut ipStatus(LED2);              // Set when IP address acquired





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DigitalOut pollStatus(LED3);            // Reserved





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DigitalOut errorStatus(LED4);           // Blink when error condition occurs; read other LEDs for code.





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AnalogIn humiditySensor(p17);           // 





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//AnalogIn tempSensor(p16);               // Temp sensor.





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SCP1000 scp1000(p5,p6,p7,p8);           // Temp & pressure.





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GPS gps(p9, p10);





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#ifdef SD_FS





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SDFileSystem sd(p5, p6, p7, p8, "fs");  // the pinout on the mbed Cool Components workshop board





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#else





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LocalFileSystem local("fs");





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#endif





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NTPClient ntp;





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PachubeClient pachube("633b3cb4e8ee8ba4a4f6c4f65df283360e0ed3d2ca572c249e532632eb5e19cd");





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void postFeed(float pressure, float humidity, float temperature) {  





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    char data[256] = {0};





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    // feed has two datastreams in this example, values are comma separated





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    sprintf("%5.3f,%5.3f,%5.3f", data, temperature, pressure, humidity);





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    pachube.PutCsv("10587", data);





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    if (pachube.Result() != HTTP_OK || pachube.Response() != 200) {





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        ledError(ERR_UPFEED);





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    } else {





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        errorStatus = !errorStatus;





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    }





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}





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/**





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 * Blink the error LED and place the error code on the other LEDs.





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 * WARNING: Never returns!





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 *





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 */





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void ledError(ErrorCode code) {





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    listenStatus = code & 1;





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    ipStatus = (code >> 1) & 1;





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    pollStatus = (code >> 2) & 1;





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    while (true) {





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        errorStatus = !errorStatus;





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        wait(BLINK_RATE);





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    }





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}





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/**





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 * Read sensor data and write it to file.





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 */





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void pollSensors() {





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    int locked = 0;





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    float temp = 0;





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    //float tempB = 0;





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    float lat = 0;





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    float lng = 0;





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    float pressure = 0;





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    float humidity = 0;





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    char * timeStr;





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    time_t ctTime;





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    pollStatus = !pollStatus;





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    FILE* fp = fopen("/fs/sensors.htm", "w");





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    if (fp == NULL) {





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        ledError(ERR_FILE);





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    }





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    // Temp





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    // (SensorValue/4) - 50





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    //temp = tempSensor * 160 - 50; // Analog to deg C





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    //temp = 1.8 * temp + 32; // deg C to F.





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    temp = scp1000.readTemperature();





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    temp = 1.8 * temp + 32; // deg C to F





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    // Pressure





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    unsigned long ulPressure = scp1000.readPressure();





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    pressure = ((float) ulPressure) / 1000.0; // Pa to kPa





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    // Humidity





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    // RH (%) = (SensorValue x 0.1906) - 40.2





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    // This might be wrong.





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    humidity = (1000 * humiditySensor * 0.1906) - 40.2;





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    ctTime = time(NULL);





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    ctTime -= 60 * 60 * 4; // Account for timezone offset.





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    timeStr = ctime(&ctTime);





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    int i = 0;





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    while (timeStr[i] != '\0') {





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        if (timeStr[i] == '\n') {





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            timeStr[i] = ' ';





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        }





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        i++;





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    } 





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    // True if GPS is locked.





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    //if (gps.sample()) {





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        //locked = 1;





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        //lat = gps.latitude;





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        //lng = gps.longitude;





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    //}





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    fprintf(fp, "{\n\t\"gpsLocked\": %d,\n", locked);





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    fprintf(fp, "\t\"latitude\": %f,\n", lat);





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    fprintf(fp, "\t\"longitude\": %f,\n", lng);





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    fprintf(fp, "\t\"temperature\": %4.2f,\n", temp);





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    fprintf(fp, "\t\"pressure\": %5.2f,\n", pressure);





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    fprintf(fp, "\t\"time\": \"%s ET\",\n", timeStr);





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    fprintf(fp, "\t\"humidity\": %5.2f\n}", humidity);





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    //postFeed(pressure, humidity, temp);





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    fclose(fp);





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}





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/**





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 * Flip listening status LED.





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 */





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void flipLed() {





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    listenStatus = !listenStatus;





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}





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/**





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 * Entry point





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 */





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int main() {





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    EthernetNetIf eth;





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    HTTPServer server;





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    ipStatus = 0;





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    listenStatus = 0;





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    pollStatus = 0;





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    EthernetErr ethErr = eth.setup();





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    if(ethErr) {





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        ledError(ERR_ETHERNET);





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    }





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    Host ntpServer(IpAddr(), 123, "nist1.columbiacountyga.gov");





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    ntp.setTime(ntpServer);





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    ipStatus = 1;





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    // Web root directory





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    FSHandler::mount("/fs", "/");





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    // Bind the filesystem handler for all requests        





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    server.addHandler<FSHandler>("/"); // "/" matches every URL





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    server.bind(80); // listen port





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    Ticker ledTicker;





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    ledTicker.attach(&flipLed, BLINK_RATE);





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    pollSensors();





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    Ticker pollTicker;





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    pollTicker.attach(&pollSensors, SENSOR_POLL_RATE);





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    // Listen indefinitely





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    while(true)





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    {





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        Net::poll();





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    }





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    return 0;





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}