1 | /*
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2 | WriteMultipleVoltages
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3 |
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4 | Reads analog voltages from pins 0-7 and writes them to the 8 fields of a channel on ThingSpeak every 20 seconds.
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5 |
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6 | ThingSpeak ( https://www.thingspeak.com ) is a free IoT service for prototyping
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7 | systems that collect, analyze, and react to their environments.
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8 |
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9 | Copyright 2015, The MathWorks, Inc.
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10 |
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11 | Documentation for the ThingSpeak Communication Library for Arduino is in the extras/documentation folder where the library was installed.
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12 | See the accompaning licence file for licensing information.
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13 | */
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14 |
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15 | #ifdef SPARK
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16 | #include "ThingSpeak/ThingSpeak.h"
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17 | #else
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18 | #include "ThingSpeak.h"
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19 | #endif
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20 |
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21 | /// ***********************************************************************************************************
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22 | // This example selects the correct library to use based on the board selected under the Tools menu in the IDE.
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23 | // Yun, Wired Ethernet shield, wi-fi shield, esp8266, and Spark are all supported.
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24 | // With Uno and Mega, the default is that you're using a wired ethernet shield (http://www.arduino.cc/en/Main/ArduinoEthernetShield)
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25 | // If you're using a wi-fi shield (http://www.arduino.cc/en/Main/ArduinoWiFiShield), uncomment the line below
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26 | // ***********************************************************************************************************
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27 | //#define USE_WIFI_SHIELD
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28 | #ifdef ARDUINO_ARCH_AVR
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29 |
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30 | #ifdef ARDUINO_AVR_YUN
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31 | #include "YunClient.h"
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32 | YunClient client;
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33 | #else
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34 |
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35 | #ifdef USE_WIFI_SHIELD
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36 | #include <SPI.h>
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37 | // ESP8266 USERS -- YOU MUST COMMENT OUT THE LINE BELOW. There's a bug in the Arduino IDE that causes it to not respect #ifdef when it comes to #includes
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38 | // If you get "multiple definition of `WiFi'" -- comment out the line below.
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39 | #include <WiFi.h>
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40 | char ssid[] = "<YOURNETWORK>"; // your network SSID (name)
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41 | char pass[] = "<YOURPASSWORD>"; // your network password
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42 | int status = WL_IDLE_STATUS;
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43 | WiFiClient client;
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44 | #else
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45 | // Use wired ethernet shield
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46 | #include <SPI.h>
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47 | #include <Ethernet.h>
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48 | byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
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49 | EthernetClient client;
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50 | #endif
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51 | #endif
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52 | // On Arduino: 0 - 1023 maps to 0 - 5 volts
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53 | #define VOLTAGE_MAX 5.0
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54 | #define VOLTAGE_MAXCOUNTS 1023.0
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55 | #endif
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56 |
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57 | #ifdef ARDUINO_ARCH_ESP8266
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58 | #include <ESP8266WiFi.h>
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59 | char ssid[] = "<YOURNETWORK>"; // your network SSID (name)
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60 | char pass[] = "<YOURPASSWORD>"; // your network password
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61 | int status = WL_IDLE_STATUS;
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62 | WiFiClient client;
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63 | // On ESP8266: 0 - 1023 maps to 0 - 1 volts
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64 | #define VOLTAGE_MAX 1.0
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65 | #define VOLTAGE_MAXCOUNTS 1023.0
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66 | #endif
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67 |
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68 | #ifdef SPARK
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69 | TCPClient client;
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70 | #define VOLTAGE_MAX 3.3
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71 | #define VOLTAGE_MAXCOUNTS 4095.0
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72 | #endif
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73 |
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74 | /*
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75 | *****************************************************************************************
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76 | **** Visit https://www.thingspeak.com to sign up for a free account and create
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77 | **** a channel. The video tutorial http://community.thingspeak.com/tutorials/thingspeak-channels/
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78 | **** has more information. You need to change this to your channel, and your write API key
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79 | **** IF YOU SHARE YOUR CODE WITH OTHERS, MAKE SURE YOU REMOVE YOUR WRITE API KEY!!
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80 | *****************************************************************************************/
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81 | unsigned long myChannelNumber = 31461;
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82 | const char * myWriteAPIKey = "LD79EOAAWRVYF04Y";
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83 |
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84 | void setup() {
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85 | #if defined(ARDUINO_ARCH_AVR) || defined(ARDUINO_ARCH_ESP8266)
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86 | #ifdef ARDUINO_AVR_YUN
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87 | Bridge.begin();
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88 | #else
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89 | #if defined(USE_WIFI_SHIELD) || defined(ARDUINO_ARCH_ESP8266)
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90 | WiFi.begin(ssid, pass);
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91 | #else
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92 | Ethernet.begin(mac);
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93 | #endif
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94 | #endif
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95 | #endif
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96 |
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97 | ThingSpeak.begin(client);
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98 | }
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99 |
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100 | void loop() {
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101 | // Read the input on each pin, convert the reading, and set each field to be sent to ThingSpeak.
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102 | // On Arduino: 0 - 1023 maps to 0 - 5 volts
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103 | // On ESP8266: 0 - 1023 maps to 0 - 1 volts
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104 | // On Particle: 0 - 4095 maps to 0 - 3.3 volts
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105 | float pinVoltage = analogRead(A0) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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106 | ThingSpeak.setField(1,pinVoltage);
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107 | #ifndef ARDUINO_ARCH_ESP8266
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108 | // The ESP8266 only has one analog input, so skip this
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109 | pinVoltage = analogRead(A1) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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110 | ThingSpeak.setField(2,pinVoltage);
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111 | pinVoltage = analogRead(A2) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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112 | ThingSpeak.setField(3,pinVoltage);
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113 | pinVoltage = analogRead(A3) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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114 | ThingSpeak.setField(4,pinVoltage);
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115 | pinVoltage = analogRead(A4) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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116 | ThingSpeak.setField(5,pinVoltage);
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117 | pinVoltage = analogRead(A5) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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118 | ThingSpeak.setField(6,pinVoltage);
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119 | pinVoltage = analogRead(A6) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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120 | ThingSpeak.setField(7,pinVoltage);
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121 | pinVoltage = analogRead(A7) * (VOLTAGE_MAX / VOLTAGE_MAXCOUNTS);
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122 | ThingSpeak.setField(8,pinVoltage);
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123 | #endif
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124 |
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125 | // Write the fields that you've set all at once.
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126 | ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
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127 |
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128 | delay(20000); // ThingSpeak will only accept updates every 15 seconds.
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129 | }
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