Nivedita Mukka / Mbed 2 deprecated WeatherDatalogger

This a domestic weather station that measures temperature, humidity and light and stores the data in a .csv file in SD card.

Dependencies:   DS1302 SDFileSystem mbed

Fork of temp_humid_light_time_DS1302_LM35_DHT11_LDR by FRDM-K64F Code Share

main.cpp@2:02668481aebc, 2016-03-27 (annotated)

Committer:
nivmukka
Date:
Sun Mar 27 04:18:07 2016 +0000
Revision:
2:02668481aebc
Parent:
1:4b3e952a1406 
Domestic weather station that measures temperature, humidity and light.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Clovis 0:8f0934e41a57 1 #include "mbed.h"
Clovis 0:8f0934e41a57 2 #include "SDFileSystem.h"
Clovis 0:8f0934e41a57 3 #include "DHT.h"
Clovis 0:8f0934e41a57 4 #include "DS1302.h"
Clovis 0:8f0934e41a57 5
Clovis 0:8f0934e41a57 6 // Defines for the DS1302 timer module
Clovis 0:8f0934e41a57 7 #define SCLK PTC1
Clovis 0:8f0934e41a57 8 #define IO PTB19
Clovis 0:8f0934e41a57 9 #define CE PTB18
Clovis 0:8f0934e41a57 10
Clovis 0:8f0934e41a57 11 SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd"); //MOSI, MISO, SCLK, SSEL. (SD Card) Tested on K64F, correct pins.
Clovis 0:8f0934e41a57 12 AnalogIn LM35(PTB2);
Clovis 0:8f0934e41a57 13 AnalogIn LDR(PTB3);
Clovis 1:4b3e952a1406 14 AnalogIn SolarPanel(PTB10);
Clovis 0:8f0934e41a57 15 int count=0;
Clovis 0:8f0934e41a57 16 float ldrcalc= 0.00;
Clovis 0:8f0934e41a57 17 DigitalOut RedLed(LED1); // Error indication
Clovis 0:8f0934e41a57 18 DigitalOut GreenLed(LED2); // LM35 read indication
Clovis 0:8f0934e41a57 19 DigitalOut Blueled(LED3); // DHT11 read indication
Clovis 0:8f0934e41a57 20 DHT sensor(PTB20,DHT11); // Use the DHT11 sensor, on pin
Clovis 0:8f0934e41a57 21 DS1302 clk(SCLK, IO, PTB18); // ports for the DS1302 time keeper
Clovis 0:8f0934e41a57 22
nivmukka 2:02668481aebc 23 int main()
nivmukka 2:02668481aebc 24 {
Clovis 0:8f0934e41a57 25 // the 6 lines below are for the time keeper chip
Clovis 0:8f0934e41a57 26 #ifdef INITIAL_RUN
Clovis 1:4b3e952a1406 27 clk.set_time(1406017928);
Clovis 0:8f0934e41a57 28 #endif
Clovis 0:8f0934e41a57 29
nivmukka 2:02668481aebc 30 char storedByte = clk.recallByte(0);
Clovis 0:8f0934e41a57 31 clk.storeByte(0, storedByte + 1);
nivmukka 2:02668481aebc 32
Clovis 0:8f0934e41a57 33 int err;
Clovis 0:8f0934e41a57 34 wait(1); // wait 1 second for DHT11 to stabilyze
Clovis 0:8f0934e41a57 35
Clovis 0:8f0934e41a57 36
Clovis 0:8f0934e41a57 37 mkdir("/sd/dados", 0777);
Clovis 0:8f0934e41a57 38
Clovis 1:4b3e952a1406 39 FILE *fp = fopen("/sd/dados/data004.csv", "a");
nivmukka 2:02668481aebc 40 if(fp == NULL)
nivmukka 2:02668481aebc 41 {
Clovis 0:8f0934e41a57 42 error("Could not open file for write\n");
nivmukka 2:02668481aebc 43 RedLed= 0;
nivmukka 2:02668481aebc 44 }
nivmukka 2:02668481aebc 45
nivmukka 2:02668481aebc 46 fprintf(fp, "%s,", "--------------\n");
Clovis 1:4b3e952a1406 47 fclose(fp);
Clovis 1:4b3e952a1406 48
nivmukka 2:02668481aebc 49 while (1)
nivmukka 2:02668481aebc 50 {
Clovis 0:8f0934e41a57 51
nivmukka 2:02668481aebc 52 Blueled= 1;
nivmukka 2:02668481aebc 53 RedLed= 1;
nivmukka 2:02668481aebc 54 GreenLed= 1;
Clovis 0:8f0934e41a57 55
nivmukka 2:02668481aebc 56 if (count < 5000000) //around 10 seconds before it reaches the count of 12000000
nivmukka 2:02668481aebc 57 {
nivmukka 2:02668481aebc 58 count++;
nivmukka 2:02668481aebc 59 }
nivmukka 2:02668481aebc 60 else
nivmukka 2:02668481aebc 61 {
nivmukka 2:02668481aebc 62 err = sensor.readData();
nivmukka 2:02668481aebc 63 if (err == 0)
nivmukka 2:02668481aebc 64 {
nivmukka 2:02668481aebc 65 GreenLed= 0;
nivmukka 2:02668481aebc 66 printf("\r\nTemperature in celsius is %4.2f C \r\n",sensor.ReadTemperature(CELCIUS));
nivmukka 2:02668481aebc 67 printf("Temperature in farenheit is %4.2f F \r\n",sensor.ReadTemperature(FARENHEIT));
nivmukka 2:02668481aebc 68 printf("Temperature in kelvin is %4.2f K \r\n",sensor.ReadTemperature(KELVIN));
nivmukka 2:02668481aebc 69 printf("Humidity is %4.2f \r\n",sensor.ReadHumidity());
nivmukka 2:02668481aebc 70 printf("Dew point is %4.2f \r\n",sensor.CalcdewPoint(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity()));
nivmukka 2:02668481aebc 71 printf("Dew point (fast) is %4.2f \r\n",sensor.CalcdewPointFast(sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity()));
nivmukka 2:02668481aebc 72 }
nivmukka 2:02668481aebc 73 else
nivmukka 2:02668481aebc 74 {
nivmukka 2:02668481aebc 75 printf("\nErr %i \r\n",err);
nivmukka 2:02668481aebc 76 }
nivmukka 2:02668481aebc 77
nivmukka 2:02668481aebc 78 FILE *fp = fopen("/sd/dados/data004.csv", "a");
Clovis 0:8f0934e41a57 79
nivmukka 2:02668481aebc 80 if(fp == NULL)
nivmukka 2:02668481aebc 81 {
nivmukka 2:02668481aebc 82 error("Could not open file for write\n");
nivmukka 2:02668481aebc 83 }
Clovis 0:8f0934e41a57 84
nivmukka 2:02668481aebc 85 ldrcalc= LDR.read();
nivmukka 2:02668481aebc 86 ldrcalc= (1/ldrcalc)-1; //Transforms the LDR value into a 0-5 signal (integer)
nivmukka 2:02668481aebc 87 time_t seconds = clk.time(NULL);
nivmukka 2:02668481aebc 88 fprintf(fp, "%s\r,%f,%f,%f\n", "LM35", "DHT11", "Humid", "Month", "Day", "Hour", "Year");
nivmukka 2:02668481aebc 89 fprintf(fp, "%s\r,%f,%f,%f,%f,%f", ctime(&seconds), 333.333*LM35.read(), SolarPanel.read(), sensor.ReadTemperature(CELCIUS), sensor.ReadHumidity(), ldrcalc);
nivmukka 2:02668481aebc 90 fclose(fp);
nivmukka 2:02668481aebc 91 printf("\n--------------------------------------------------\n");
nivmukka 2:02668481aebc 92
nivmukka 2:02668481aebc 93 count=0;
nivmukka 2:02668481aebc 94 Blueled= 0;
nivmukka 2:02668481aebc 95 }
Clovis 0:8f0934e41a57 96 }
nivmukka 2:02668481aebc 97 }