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Name: Uno-Leonardo Data Logger
Type: Arduino Shield
Version: 1.0.0
Author: Dubravko Penezic
Copyright: Creative Commons BY-NC-SA v 3.0
Implemented function:
Digital Pin: 0, 1, 2, 3, 4, 6, 7, 8, 9
Analogue Pin: 3, special (6, 7)
Bus: ICSP, TWI
Power Pin: GND, +5V, +3.3V
Other Pin: RESET
Digital Pin: 0, 1, 4, 6, 7, 8, 9, 11, 12, 13
Analogue Pin: 3, 4, 5, special (6, 7)
Bus: ICSP, TWI
Power Pin: GND, +5V, +3.3V
Other Pin: RESET
Schematic are available in follow file : dl_v_1_0_0.pdf
To compile follow code you will also need libraries DpFormatNumber and DpDS1307 available in libraries.zip file.
// Author: Dubravko Penezic // Version: 1.0, 2012 // Read data from barometic sensor, and two LM35 sensors, gether date and time from RTC, and save data to text file on SD card // Source code is provided as is, without any warranty. // Distributetd under CC BY v 3.0 // Barometric sensor variable #include <Wire.h> #define BMP085_ADDRESS 0x77 // I2C address of BMP085 const unsigned char OSS = 0; // Oversampling Setting // Calibration values int ac1; int ac2; int ac3; unsigned int ac4; unsigned int ac5; unsigned int ac6; int b1; int b2; int mb; int mc; int md; // b5 is calculated in bmp085GetTemperature(...), this variable is also used in bmp085GetPressure(...) // so ...Temperature(...) must be called before ...Pressure(...). long b5; short b_temperature; long b_pressure; // Use these for altitude conversions const float p0 = 101325; // Pressure at sea level (Pa) float b_altitude; // temperature LM35 sensor variable float lm1_temperature; int lm1_tempPin = 0; float lm2_temperature; int lm2_tempPin = 1; // format numbers #include <DpFormatNumber.h> DpFormatNumber fN; char pn[9]; // RTC lib #include <DpDS1307.h> DpDS1307 RTC=DpDS1307(); // include the SD library: #include <SD.h> File myFile; String file_name = ""; void setup() { Serial.begin(9600); pinMode(10, OUTPUT); Wire.begin(); bmp085Calibration(); // make sure that the default chip select pin is set to // output, even if you don't use it: pinMode(7, OUTPUT); digitalWrite(7, HIGH); // see if the card is present and can be initialized: if (!SD.begin(7)) { Serial.println("Card failed, or not present"); // don't do anything more: return; } RTC.startClock(); } void loop() { String raw = ""; // Serial.println(freeRam()); RTC.getTime(); fN.UnsInt2ForStr(RTC.year,5,true,pn); raw = raw + pn +"-"; fN.UnsInt2ForStr(RTC.month,3,true,pn); raw = raw + pn +"-"; fN.UnsInt2ForStr(RTC.day,3,true,pn); raw = raw + pn +" "; fN.UnsInt2ForStr(RTC.hour,3,true,pn); raw = raw + pn +":"; fN.UnsInt2ForStr(RTC.minute,3,true,pn); raw = raw + pn +":"; fN.UnsInt2ForStr(RTC.second,3,true,pn); raw = raw + pn; raw.replace("- ","-0"); raw.replace(" "," 0"); raw.replace(": ",":0"); file_name = raw; file_name.replace("-",""); file_name.replace(" ",""); file_name.replace(":",""); file_name = file_name + ".txt"; file_name_not_exist = false; raw = raw +";"; b_pressure = bmp085GetPressure(bmp085ReadUP()); fN.SigLon2ForStr(b_pressure, 8, false, pn); raw = raw + pn +";"; b_altitude = (float)44330 * (1 - pow(((float) b_pressure/p0), 0.190295)); fN.Float2ForStr(b_altitude,9, 2, false, pn); raw = raw + pn +";"; b_temperature = bmp085GetTemperature(bmp085ReadUT()); fN.Float2ForStr((float)b_temperature/10,7,1,false, pn); raw = raw + pn +";"; lm1_temperature = analogRead(lm1_tempPin); //read the value from the sensor lm1_temperature = (5.0 * lm1_temperature * 100.0)/1024.0; //convert the analog data to temperature fN.Float2ForStr(lm1_temperature,8, 2, false, pn); raw = raw + pn +";"; lm2_temperature = analogRead(lm2_tempPin); //read the value from the sensor lm2_temperature = (5.0 * lm2_temperature * 100.0)/1024.0; //convert the analog data to temperature fN.Float2ForStr(b_altitude,8, 2, false, pn); raw = raw + pn +";"; Serial.println(raw); char fn[24]; file_name.substring(3,11).toCharArray(fn,9); Serial.println(fn); myFile = SD.open(fn, FILE_WRITE); // if the file opened okay, write to it: if (myFile) { myFile.println(raw); // close the file: myFile.close(); } else { // if the file didn't open, print an error: Serial.println("error opening "+file_name); } delay(5000); } // Stores all of the bmp085's calibration values into global variables // Calibration values are required to calculate temp and pressure // This function should be called at the beginning of the program void bmp085Calibration() { ac1 = bmp085ReadInt(0xAA); ac2 = bmp085ReadInt(0xAC); ac3 = bmp085ReadInt(0xAE); ac4 = bmp085ReadInt(0xB0); ac5 = bmp085ReadInt(0xB2); ac6 = bmp085ReadInt(0xB4); b1 = bmp085ReadInt(0xB6); b2 = bmp085ReadInt(0xB8); mb = bmp085ReadInt(0xBA); mc = bmp085ReadInt(0xBC); md = bmp085ReadInt(0xBE); } // Calculate temperature given ut. // Value returned will be in units of 0.1 deg C short bmp085GetTemperature(unsigned int ut) { long x1, x2; x1 = (((long)ut - (long)ac6)*(long)ac5) >> 15; x2 = ((long)mc << 11)/(x1 + md); b5 = x1 + x2; return ((b5 + 8)>>4); } // Calculate pressure given up // calibration values must be known // b5 is also required so bmp085GetTemperature(...) must be called first. // Value returned will be pressure in units of Pa. long bmp085GetPressure(unsigned long up) { long x1, x2, x3, b3, b6, p; unsigned long b4, b7; b6 = b5 - 4000; // Calculate B3 x1 = (b2 * (b6 * b6)>>12)>>11; x2 = (ac2 * b6)>>11; x3 = x1 + x2; b3 = (((((long)ac1)*4 + x3)<<OSS) + 2)>>2; // Calculate B4 x1 = (ac3 * b6)>>13; x2 = (b1 * ((b6 * b6)>>12))>>16; x3 = ((x1 + x2) + 2)>>2; b4 = (ac4 * (unsigned long)(x3 + 32768))>>15; b7 = ((unsigned long)(up - b3) * (50000>>OSS)); if (b7 < 0x80000000) p = (b7<<1)/b4; else p = (b7/b4)<<1; x1 = (p>>8) * (p>>8); x1 = (x1 * 3038)>>16; x2 = (-7357 * p)>>16; p += (x1 + x2 + 3791)>>4; return p; } // Read 1 byte from the BMP085 at 'address' char bmp085Read(unsigned char address) { unsigned char data; Wire.beginTransmission(BMP085_ADDRESS); Wire.write(address); Wire.endTransmission(); Wire.requestFrom(BMP085_ADDRESS, 1); while(!Wire.available()) ; return Wire.read(); } // Read 2 bytes from the BMP085 // First byte will be from 'address' // Second byte will be from 'address'+1 int bmp085ReadInt(unsigned char address) { unsigned char msb, lsb; Wire.beginTransmission(BMP085_ADDRESS); Wire.write(address); Wire.endTransmission(); Wire.requestFrom(BMP085_ADDRESS, 2); while(Wire.available()<2) ; msb = Wire.read(); lsb = Wire.read(); return (int) msb<<8 | lsb; } // Read the uncompensated temperature value unsigned int bmp085ReadUT() { unsigned int ut; // Write 0x2E into Register 0xF4 // This requests a temperature reading Wire.beginTransmission(BMP085_ADDRESS); Wire.write(0xF4); Wire.write(0x2E); Wire.endTransmission(); // Wait at least 4.5ms delay(5); // Read two bytes from registers 0xF6 and 0xF7 ut = bmp085ReadInt(0xF6); return ut; } // Read the uncompensated pressure value unsigned long bmp085ReadUP() { unsigned char msb, lsb, xlsb; unsigned long up = 0; // Write 0x34+(OSS<<6) into register 0xF4 // Request a pressure reading w/ oversampling setting Wire.beginTransmission(BMP085_ADDRESS); Wire.write(0xF4); Wire.write(0x34 + (OSS<<6)); Wire.endTransmission(); // Wait for conversion, delay time dependent on OSS delay(2 + (3<<OSS)); // Read register 0xF6 (MSB), 0xF7 (LSB), and 0xF8 (XLSB) Wire.beginTransmission(BMP085_ADDRESS); Wire.write(0xF6); Wire.endTransmission(); Wire.requestFrom(BMP085_ADDRESS, 3); // Wait for data to become available while(Wire.available() < 3) ; msb = Wire.read(); lsb = Wire.read(); xlsb = Wire.read(); up = (((unsigned long) msb << 16) | ((unsigned long) lsb << 8) | (unsigned long) xlsb) >> (8-OSS); return up; } // function for chacking mememory leek // int freeRam () { // extern int __heap_start, *__brkval; // int v; // return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); //}