1 | #include <SFE_BMP180.h>
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2 |
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3 | /*
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4 |
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5 |
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6 |
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7 |
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8 | * analog sensors on analog ins 0, 1,
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9 | * SD card attached to SPI bus as follows:
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10 | ** MOSI - pin 11
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11 | ** MISO - pin 12
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12 | ** CLK - pin 13
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13 | ** CS - pin 4 (digital assigned via setup)
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14 | ** VCC & Ground
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15 | -------------------------------------------------------------------
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16 | V2-
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17 | Adding RTC support
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18 | RTC Connected to VCC and Ground
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19 | I2C Connections:
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20 | RTC SDA connected to pin Analog 4
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21 | RTC SCL connected to pin Analog 5
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22 |
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23 | Used I2CScanner.ino to find I2C addresses- 0x50 (EEPROM?) and 0x68 found
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24 | Used SetRTC.ino to manually set proper date/date on RTC module- This wil set the date/time as soon as serial
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25 | is initiated so set ahead by a minute and wait till time matches then open serial window to set.
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26 | -----------------------------------------------------------------------
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27 | V3-
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28 | Added Adafruit 992- MPL115A2 Baro/Temp Sensor 5volt 12C device
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29 | SDA connected to pin Analog 4
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30 | SCL connected to pin Analog 5
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31 | Code below should be optimized to avoid multiple I2C calls
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32 |
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33 | Added Battery Voltage Monitoring:
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34 | Changed A0 to be used for Bus Voltage monitoring (on board LiPo)
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35 | Will use voltage divider with 2 10Kohm resistores to monitor the 7.4V supply from battery
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36 | http://forum.arduino.cc/index.php/topic,13728.0.html
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37 | Testing- Ran solid 15 hours no issues, 47000 lines recorded, Filesize 2.1MB
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38 | -----------------------------------------------------------------------
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39 | V4
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40 | Added output for altitude in meters (Thanks Jon)
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41 | http://forum.arduino.cc/index.php?topic=63726.0
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42 | Used static value of 15 for Temp as using actual temp causes unreliable values indoors
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43 |
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44 | ------------------------------------------------------------------------
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45 | V5
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46 | Added code for LM35 Temp sensor (Will be internal monitoring) on A1 data2 and temp variables
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47 | Had to do 2 analog reads to debounce the values with a small delay.
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48 | Added Bluetooth- shortened serial write text to fit phone screen
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49 | W
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50 | ----------------------------------------------------------------------
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51 | */
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52 | #include <SFE_BMP180>// Support for Sensor BMP180
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53 | Adafruit_SFE BMP180//Support for BMP 180#include "Wire.h"
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54 | #define DS1307_ADDRESS 0x68//RTC Support
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55 | //Eric Note- another address showed up in scan at 0X50 EEPROM?
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56 | byte zero = 0x00; //workaround for issue #527 RTC Support
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57 |
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58 | const float referenceVolts = 5.0; // the default reference on a 5 volt board
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59 | const int batteryPin = 0; // +V from battery is connected to analog pin 0
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60 | const float sea_press = 1013.25;//added for altitude calc
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61 | float alt=0;//added for altitude calc
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62 |
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63 | #include <SD.h>
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64 | File myFile; //SD
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65 | const int chipSelect=4; // set chipselect pin to 4 for SD
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66 | //int dat1=A0;//set data pin
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67 | int dat2=1;//define pin0 connect with LM35
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68 | float temp=0;
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69 | //int data1=0;
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70 | int data2=0;
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71 | int i=0;
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72 | boolean present=0;// SD Card available & usable
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73 | void setup()
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74 | {
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75 |
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76 | Wire.begin();
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77 | Serial.begin(9600);
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78 | mpl115a2.begin();// Baro Sensor Adafruit 992- MPL115A2
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79 | //pinMode(dat1,INPUT);
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80 | pinMode(dat2,INPUT);
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81 | checkSD();
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82 | // Write column headers for Excel CSV
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83 | myFile = SD.open("datalog.csv", FILE_WRITE);
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84 | if(myFile)
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85 | {
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86 | //Prints headers to file
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87 | myFile.print("Time"); // Prints Date and Time header
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88 | myFile.print(",");
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89 | myFile.print("line#");// prints line number Header for troubleshooting etc
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90 | myFile.print(",");
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91 | myFile.print("BusVoltage");
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92 | myFile.print(",");
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93 | myFile.print("IntTemp");
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94 | myFile.print(",");
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95 | myFile.print("Pressure");
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96 | myFile.print(",");
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97 | myFile.print("ExtTemp");
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98 | myFile.print(",");
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99 | myFile.println("Alt(m)");
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100 | myFile.close();
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101 |
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102 | }
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103 | }
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104 | void loop()
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105 | {
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106 | int val = analogRead(batteryPin); // read the value from the A0 battery monitoring pin with voltage divider
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107 | float volts = (val / 511.0) * referenceVolts ; // divide val by (1023/2)because the resistors divide the voltage in half
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108 |
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109 | float pressureKPA = 0, temperatureC = 0; //Adafruit 992- MPL115A2
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110 | if(present==1)
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111 | {
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112 | pressureKPA = mpl115a2.getPressure();//get pressure Adafruit 992- MPL115A2
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113 | temperatureC = mpl115a2.getTemperature(); //Adafruit 992- MPL115A2
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114 | printDate(); //Runs the print date subroutine below
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115 | i++;
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116 | //data1=analogRead(dat1);
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117 | analogRead(1);// added to take initial read to stabilize the ADC
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118 | delay(10);// Delay to stabilize the ADC
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119 | temp = analogRead(1) * 5000L / 1024L / 10;// Temperature calculation formula
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120 | //data2=analogRead(dat2); //used for Ext Temp sensor TBD
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121 | //temp= data2 * 4.9 / 10 ; // Temperature calculation formula
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122 | Serial.print(" BusV:");
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123 | Serial.print(volts);
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124 | Serial.print(" ITemp:");
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125 | Serial.print(temp);
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126 | Serial.print(" Press:");
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127 | Serial.print(pressureKPA, 4);
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128 | Serial.print(" ExTemp:");
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129 | Serial.print(temperatureC, 1);
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130 | alt= ((pow((sea_press / (pressureKPA *10)), 1/5.257) - 1.0) * (15 + 273.15)) / 0.0065;//rough altitude equation in meters can use real temp instead of 15
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131 | Serial.print(" Alt:");
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132 | Serial.println(alt);
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133 | writeSD();
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134 | }
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135 | delay(1000);
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136 | }
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137 |
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138 | byte decToBcd(byte val){ //Eric- needed for RTC variable stuff
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139 | // Convert normal decimal numbers to binary coded decimal
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140 | return ( (val/10*16) + (val%10) );
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141 | }
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142 |
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143 | byte bcdToDec(byte val) { //Eric- needed for RTC variable stuff
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144 | // Convert binary coded decimal to normal decimal numbers
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145 | return ( (val/16*10) + (val%16) );
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146 | }
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147 |
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148 | void checkSD()
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149 | {
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150 | Serial.print("check SD card");
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151 | if (!SD.begin(chipSelect)) {
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152 | Serial.println("Card failed");
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153 | // don't do anything more:
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154 | return;
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155 | }
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156 | Serial.println("SD card OK");
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157 | present=1;
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158 | delay(2000);
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159 | }
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160 |
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161 | void writeSD()
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162 | {
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163 | myFile = SD.open("datalog.csv", FILE_WRITE);
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164 | if(myFile)
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165 | {
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166 | int val = analogRead(batteryPin); // read the value from the A0 battery monitoring pin with voltage divider
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167 | float volts = (val / 511.0) * referenceVolts ; // divide val by (1023/2)because the resistors divide the voltage in half
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168 | // Reset the register pointer
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169 | Wire.beginTransmission(DS1307_ADDRESS);
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170 | Wire.write(zero);
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171 | Wire.endTransmission();
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172 |
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173 | Wire.requestFrom(DS1307_ADDRESS, 7);
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174 |
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175 | int second = bcdToDec(Wire.read());
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176 | int minute = bcdToDec(Wire.read());
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177 | int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
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178 | int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
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179 | int monthDay = bcdToDec(Wire.read());
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180 | int month = bcdToDec(Wire.read());
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181 | int year = bcdToDec(Wire.read());
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182 | float pressureKPA = mpl115a2.getPressure();//get pressure Adafruit 992- MPL115A2- these are redundant calls to I2c but I dont want to fix
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183 | float temperatureC = mpl115a2.getTemperature();//get temp Adafruit 992- MPL115A2- these are redundant calls to I2c but I dont want to fix
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184 |
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185 | //Print RTC values to SD
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186 | myFile.print(month);
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187 | myFile.print("/");
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188 | myFile.print(monthDay);
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189 | myFile.print("/");
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190 | myFile.print(year);
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191 | myFile.print(" ");
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192 | myFile.print(hour);
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193 | myFile.print(":");
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194 | myFile.print(minute);
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195 | myFile.print(":");
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196 | myFile.print(second);
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197 | //myFile.print(":");
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198 | myFile.print(",");
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199 | //End Print RTC values
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200 | myFile.print(i);
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201 | myFile.print(",");
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202 | myFile.print(volts);
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203 | myFile.print(",");
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204 | myFile.print(temp);
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205 | myFile.print(",");
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206 | myFile.print(pressureKPA, 4);
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207 | myFile.print(",");
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208 | myFile.print(temperatureC, 1);
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209 | myFile.print(",");
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210 | myFile.println(alt);
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211 | myFile.close();
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212 |
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213 | }
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214 | }
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215 |
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216 | void printDate()// Only used to print to serial and not needed for logging purposes
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217 | {
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218 | Wire.beginTransmission(DS1307_ADDRESS);
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219 | Wire.write(zero);
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220 | Wire.endTransmission();
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221 |
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222 | Wire.requestFrom(DS1307_ADDRESS, 7);
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223 |
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224 | int second = bcdToDec(Wire.read());
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225 | int minute = bcdToDec(Wire.read());
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226 | int hour = bcdToDec(Wire.read() & 0b111111); //24 hour time
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227 | int weekDay = bcdToDec(Wire.read()); //0-6 -> sunday - Saturday
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228 | int monthDay = bcdToDec(Wire.read());
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229 | int month = bcdToDec(Wire.read());
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230 | int year = bcdToDec(Wire.read());
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231 |
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232 | //print the date EG 3/1/11 23:59:59
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233 | Serial.print(month);
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234 | Serial.print("/");
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235 | Serial.print(monthDay);
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236 | Serial.print("/");
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237 | Serial.print(year);
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238 | Serial.print(" ");
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239 | Serial.print(hour);
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240 | Serial.print(":");
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241 | Serial.print(minute);
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242 | Serial.print(":");
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243 | Serial.print(second);
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244 |
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245 | }
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