root / arduino-1.0 / libraries / Ethernet / examples / PachubeClient / PachubeClient.ino @ 58d82c77
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1 | 58d82c77 | Tom Mullins | /* |
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2 | Pachube sensor client |
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3 | |||
4 | This sketch connects an analog sensor to Pachube (http://www.pachube.com) |
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5 | using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or |
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6 | the Adafruit Ethernet shield, either one will work, as long as it's got |
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7 | a Wiznet Ethernet module on board. |
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8 | |||
9 | Circuit: |
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10 | * Analog sensor attached to analog in 0 |
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11 | * Ethernet shield attached to pins 10, 11, 12, 13 |
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12 | |||
13 | created 15 March 2010 |
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14 | updated 26 Oct 2011 |
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15 | by Tom Igoe |
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16 | |||
17 | http://www.tigoe.net/pcomp/code/category/arduinowiring/873 |
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18 | This code is in the public domain. |
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19 | |||
20 | */ |
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21 | |||
22 | #include <SPI.h> |
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23 | #include <Ethernet.h> |
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24 | |||
25 | // assign a MAC address for the ethernet controller. |
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26 | // Newer Ethernet shields have a MAC address printed on a sticker on the shield |
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27 | // fill in your address here: |
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28 | byte mac[] = { |
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29 | 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; |
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30 | |||
31 | // fill in an available IP address on your network here, |
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32 | // for manual configuration: |
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33 | IPAddress ip(10,0,1,20); |
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34 | // initialize the library instance: |
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35 | EthernetClient client; |
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36 | |||
37 | long lastConnectionTime = 0; // last time you connected to the server, in milliseconds |
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38 | boolean lastConnected = false; // state of the connection last time through the main loop |
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39 | const int postingInterval = 10000; //delay between updates to Pachube.com |
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40 | |||
41 | void setup() { |
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42 | // start serial port: |
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43 | Serial.begin(9600); |
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44 | // start the Ethernet connection: |
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45 | if (Ethernet.begin(mac) == 0) { |
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46 | Serial.println("Failed to configure Ethernet using DHCP"); |
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47 | // no point in carrying on, so do nothing forevermore: |
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48 | for(;;) |
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49 | ; |
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50 | } |
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51 | // give the ethernet module time to boot up: |
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52 | delay(1000); |
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53 | // start the Ethernet connection: |
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54 | if (Ethernet.begin(mac) == 0) { |
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55 | Serial.println("Failed to configure Ethernet using DHCP"); |
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56 | // Configure manually: |
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57 | Ethernet.begin(mac, ip); |
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58 | } |
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59 | } |
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60 | |||
61 | void loop() { |
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62 | // read the analog sensor: |
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63 | int sensorReading = analogRead(A0); |
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64 | |||
65 | // if there's incoming data from the net connection. |
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66 | // send it out the serial port. This is for debugging |
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67 | // purposes only: |
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68 | if (client.available()) { |
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69 | char c = client.read(); |
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70 | Serial.print(c); |
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71 | } |
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72 | |||
73 | // if there's no net connection, but there was one last time |
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74 | // through the loop, then stop the client: |
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75 | if (!client.connected() && lastConnected) { |
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76 | Serial.println(); |
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77 | Serial.println("disconnecting."); |
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78 | client.stop(); |
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79 | } |
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80 | |||
81 | // if you're not connected, and ten seconds have passed since |
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82 | // your last connection, then connect again and send data: |
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83 | if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) { |
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84 | sendData(sensorReading); |
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85 | } |
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86 | // store the state of the connection for next time through |
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87 | // the loop: |
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88 | lastConnected = client.connected(); |
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89 | } |
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90 | |||
91 | // this method makes a HTTP connection to the server: |
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92 | void sendData(int thisData) { |
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93 | // if there's a successful connection: |
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94 | if (client.connect("www.pachube.com", 80)) { |
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95 | Serial.println("connecting..."); |
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96 | // send the HTTP PUT request. |
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97 | // fill in your feed address here: |
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98 | client.print("PUT /api/YOUR_FEED_HERE.csv HTTP/1.1\n"); |
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99 | client.print("Host: www.pachube.com\n"); |
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100 | // fill in your Pachube API key here: |
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101 | client.print("X-PachubeApiKey: YOUR_KEY_HERE\n"); |
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102 | client.print("Content-Length: "); |
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103 | |||
104 | // calculate the length of the sensor reading in bytes: |
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105 | int thisLength = getLength(thisData); |
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106 | client.println(thisLength, DEC); |
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107 | |||
108 | // last pieces of the HTTP PUT request: |
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109 | client.print("Content-Type: text/csv\n"); |
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110 | client.println("Connection: close\n"); |
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111 | |||
112 | // here's the actual content of the PUT request: |
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113 | client.println(thisData, DEC); |
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114 | |||
115 | // note the time that the connection was made: |
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116 | lastConnectionTime = millis(); |
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117 | } |
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118 | else { |
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119 | // if you couldn't make a connection: |
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120 | Serial.println("connection failed"); |
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121 | } |
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122 | } |
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123 | |||
124 | |||
125 | // This method calculates the number of digits in the |
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126 | // sensor reading. Since each digit of the ASCII decimal |
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127 | // representation is a byte, the number of digits equals |
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128 | // the number of bytes: |
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129 | |||
130 | int getLength(int someValue) { |
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131 | // there's at least one byte: |
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132 | int digits = 1; |
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133 | // continually divide the value by ten, |
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134 | // adding one to the digit count for each |
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135 | // time you divide, until you're at 0: |
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136 | int dividend = someValue /10; |
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137 | while (dividend > 0) { |
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138 | dividend = dividend /10; |
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139 | digits++; |
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140 | } |
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141 | // return the number of digits: |
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142 | return digits; |
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143 | } |