Below is the code I currently have compiled. I have a capacitive sensor (piece of copper) with a 15 megohm resistor, when running on its own the serial monitor is showing values around 4000. When sensing the values are around 8-9000. I would like to track/log the amount of time that the sensor is active (8-9000+) on Cosm.
I have an Arduino Ethernet shield on top of an Arduino Uno and a breadboard. (See images)
I'm new to this, and would greatly appreciate the support.
#include <CapSense.h>
CapSense cs_4_2 = CapSense(4,2); // 15 megohm resistor between pins 4 & 2, pin 2 is sensor pin, add Material
// CapSense cs_4_5 = CapSense(4,5); // OPTIONAL: for sensor 2, 15 megohm resistor between pins 4 & 6, pin 6 is sensor pin, add Material
// CapSense cs_4_8 = CapSense(4,8); // OPTIONAL: for sensor 3, 15 megohm resistor between pins 4 & 8, pin 8 is sensor pin, add Material
void setup()
{
cs_4_2.set_CS_AutocaL_Millis(0xFFFFFFFF); // turn off autocalibrate on channel 1 - just as an example
Serial.begin(9600);
}
void loop()
{
long start = millis();
long total1 = cs_4_2.capSense(30);
// long total2 = cs_4_5.capSense(30); // OPTIONAL for sensor 2
// long total3 = cs_4_8.capSense(30); // OPTIONAL for sensor 3
// Serial.print(millis() - start); // OPTIONAL: check on performance in milliseconds
// Serial.print(" "); // OPTIONAL: tab character for debug windown spacing
Serial.println(total1); // OPTIONAL: To use additional sensors,change Serial.println to Serial.print for proper window spacing
//Serial.print(" "); // OPTIONAL: tab character for window spacing for sensor output 2
//Serial.print(total2); // OPTIONAL: print sensor output 2
//Serial.print(" "); // OPTIONAL: tab character character for sensor output 3
//Serial.println(total3); // print sensor output 3
delay(100); // arbitrary delay to limit data to serial port
}
#include <SPI.h>
#include <Ethernet.h>
#define APIKEY "YdsCzUG0fG4d464RksEUkYWZArCSAKxDRjJHbU5iMmRJST0g" // replace your Cosm api key here
#define FEEDID 69971 // replace your feed ID
#define USERAGENT "Spaces" // user agent is the project name
// assign a MAC address for the ethernet controller.
// Newer Ethernet shields have a MAC address printed on a sticker on the shield
// fill in your address here:
byte mac[] = {
0x90, 0xA2, 0xDA, 0x00, 0xD3, 0xE6};
// fill in an available IP address on your network here,
// for manual configuration:
IPAddress ip(192,168,1,65);
// initialize the library instance:
EthernetClient client;
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
//IPAddress server(216,52,233,121); // numeric IP for api.cosm.com
char server[] = "api.cosm.com"; // name address for cosm API
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
boolean lastConnected = false; // state of the connection last time through the main loop
const unsigned long postingInterval = 10*1000; //delay between updates to cosm.com
void setup() {
// start serial port:
Serial.begin(9600);
// start the Ethernet connection:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
// DHCP failed, so use a fixed IP address:
Ethernet.begin(mac, ip);
}
}
void loop() {
// read the analog sensor:
int sensorReading = analogRead(A0);
// if there's incoming data from the net connection.
// send it out the serial port. This is for debugging
// purposes only:
if (client.available()) {
char c = client.read();
Serial.print(c);
}
// if there's no net connection, but there was one last time
// through the loop, then stop the client:
if (!client.connected() && lastConnected) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
// if you're not connected, and ten seconds have passed since
// your last connection, then connect again and send data:
if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
sendData(sensorReading);
}
// store the state of the connection for next time through
// the loop:
lastConnected = client.connected();
}
// this method makes a HTTP connection to the server:
void sendData(int thisData) {
// if there's a successful connection:
if (client.connect(server, 80)) {
Serial.println("connecting...");
// send the HTTP PUT request:
client.print("PUT /v2/feeds/");
client.print(FEEDID);
client.println(".csv HTTP/1.1");
client.println("Host: api.cosm.com");
client.print("X-ApiKey: ");
client.println(APIKEY);
client.print("User-Agent: ");
client.println(USERAGENT);
client.print("Content-Length: ");
// calculate the length of the sensor reading in bytes:
// 8 bytes for "sensor1," + number of digits of the data:
int thisLength = 8 + getLength(thisData);
client.println(thisLength);
// last pieces of the HTTP PUT request:
client.println("Content-Type: text/csv");
client.println("Connection: close");
client.println();
// here's the actual content of the PUT request:
client.print("sensor1,");
client.println(thisData);
}
else {
// if you couldn't make a connection:
Serial.println("connection failed");
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
// note the time that the connection was made or attempted:
lastConnectionTime = millis();
}
// This method calculates the number of digits in the
// sensor reading. Since each digit of the ASCII decimal
// representation is a byte, the number of digits equals
// the number of bytes:
int getLength(int someValue) {
// there's at least one byte:
int digits = 1;
// continually divide the value by ten,
// adding one to the digit count for each
// time you divide, until you're at 0:
int dividend = someValue /10;
while (dividend > 0) {
dividend = dividend /10;
digits++;
}
// return the number of digits:
return digits;
}