Another environmental sensor for my parents' house - Versionsgeschichte

Dl8rds: /* Images */

2018-03-18T22:08:10Z

‎Images

Dl8rds am 27. Dezember 2016 um 19:53 Uhr

2016-12-27T19:53:43Z

Dl8rds am 27. Dezember 2016 um 12:07 Uhr

2016-12-27T12:07:47Z

Dl8rds: /* The Code */

2016-12-27T12:05:03Z

‎The Code

Dl8rds am 27. Dezember 2016 um 12:04 Uhr

2016-12-27T12:04:34Z

Dl8rds: /* Images */

2016-12-27T11:26:54Z

‎Images

Dl8rds: /* Images */

2016-12-27T11:25:42Z

‎Images

Dl8rds am 27. Dezember 2016 um 10:44 Uhr

2016-12-27T10:44:22Z

Dl8rds: Die Seite wurde neu angelegt: „== Project Scope == Measure sone environmental values in my parents' heating unit|As I have created an environmental sensor for the heating system of my par…“

2016-12-27T10:09:52Z

Die Seite wurde neu angelegt: „== Project Scope == Measure sone environmental values in my parents' heating unit|As I have created an environmental sensor for the heating system of my par…“

Neue Seite

== Project Scope ==

[[Measure sone environmental values in my parents' heating unit|As I have created an environmental sensor for the heating system of my parents' house a couple of years ago]], I can monitor some basic values my parents' heating system. But the overall performance of the pumps can only be certified if we meeasure the heat that arrives in the last floor right under the roof. Given that this is a floor that is not visited every day, it was a good point to place another environmental sensor there.

== Parts List ==

* Arduino Duemillanove (Atmel 328P)
* Arduino Ethernet Shield V1
* TEMT6000 light sensor
* Watterott BME 280 environmental sensor
* DC/DC step down converter
* two reactor coils to block HF from the DC converter
* passive POE injector

== Links ==

I found these resources very helpful:

* http://cactus.io/hookups/sensors/barometric/bme280/hookup-arduino-to-bme280-barometric-pressure-sensor
* http://cactus.io/projects/weather/arduino-weather-station-bme280-sensor

== Software ==

=== Arduino software ===

=== The Code ===

The SPI hookup of the BME 280 sensor was not attractive as I an very convinced of I2C on the Arduino platform. The Adafruit libraries are focussing SPI, so they are not so well usable. I decided to use the cactus implementation instead.

Connectivity to the TEMT6000 sensor is straight forward as it is just a direct wire to the ADC pin 0.

In order to display everything on the web, I combined the cactus sketch with the standard Ethernet Webserver example.

<pre>
/***************************************************************************
This is a library for the BME280 humidity, temperature & pressure sensor
Designed specifically to work with the BME280 Breakout board
----> http://www.adafruit.com/products/2650
This sketch only supports the I2C bus for connection.
***************************************************************************/

#include <Wire.h>
#include "cactus_io_BME280_I2C.h"
#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xAA, 0xAA, 0xED
};
IPAddress ip(192, 168, 1, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);

// Create the BME280 object
BME280_I2C bme; // I2C using default 0x77
// or BME280_I2C bme(0x76); // I2C using address 0x76

int temt6000Pin = 0;

void setup() {
Serial.begin(9600);
Serial.println("Bosch BME280 Barometric Pressure - Humidity - Temp Sensor | cactus.io");

if (!bme.begin()) {
Serial.println("Could not find a valid BME280 sensor, check wiring!");
while (1);
}

bme.setTempCal(-1);

while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());

Serial.println("Pressure\tHumdity\t\tTemp\t\tTemp");
}

void loop() {

// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {

// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 2"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("<table>");
bme.readSensor();

Serial.print(bme.getPressure_MB()); Serial.print(" mBar\t"); // Pressure in millibars
client.println("<tr><td>");
client.println("Pressure"),
client.println("</td><td>");
client.print(bme.getPressure_MB());
client.println("</td><td>");
client.println(" mBar");
client.println("</td></tr>");

Serial.print(bme.getHumidity()); Serial.print(" %\t");
client.println("<tr><td>");
client.println("Humidity"),
client.println("</td><td>");
client.print(bme.getHumidity());
client.println("</td><td>");
client.println(" %");
client.println("</td></tr>");

Serial.print(bme.getTemperature_C()); Serial.print(" *C\t");
client.println("<tr><td>");
client.println("Temperature_C");
client.println("</td><td>");
client.print(bme.getTemperature_C());
client.println("</td><td>");
client.println(" °C");
client.println("</td></tr>");

Serial.print(bme.getTemperature_F()); Serial.print(" *F\t");
client.println("<tr><td>");
client.println("Temperature_F"),
client.println("</td><td>");
client.print(bme.getTemperature_F());
client.println("</td><td>");
client.println(" °F");
client.println("</td></tr>");

int value = analogRead(temt6000Pin);
Serial.print(value); Serial.println(" L");
client.println("<tr><td>");
client.println("Light");
client.println("</td><td>");
client.print(value);
client.println("</td><td>");
client.println(" L");
client.println("</td></tr>"),

client.println("</table>");
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}

}
</pre>

== Images ==

@@ Zeile 195: / Zeile 195: @@
+}
 </pre>
 == Images ==
 [[Image:2016-12-27-envsensor1.jpg|400px]]
@@ Zeile 208: / Zeile 233: @@
 [[Image:2016-12-27-envsensor6.jpg|400px]]
 [[Image:2016-12-27-envsensor7.jpg|400px]]

@@ Zeile 1: / Zeile 1: @@
 == Project Scope ==
-[[Measure sone environmental values in my parents' heating unit|As I have created an environmental sensor for the heating system of my parents' house a couple of years ago]], I can monitor some basic values my parents' heating system. But the overall performance of the pumps can only be certified if we meeasure the heat that arrives in the last floor right under the roof. Given that this is a floor that is not visited every day, it was a good point to place another environmental sensor there.
+[[Measure sone environmental values in my parents' heating unit|As I have created an environmental sensor for the heating system of my parents' house a couple of years ago]], I can monitor some basic values my parents' heating system. But the overall performance of the pumps can only be certified if we measure the heat that arrives in the last floor right under the roof. Given that this is a floor that is not visited every day, it was a good point to place another environmental sensor there.
 == Parts List ==
@@ Zeile 12: / Zeile 12: @@
 * two reactor coils to block HF from the DC converter ~2 EUR
 * passive POE injector, ~ 3 EUR
-* A mettal case ~15 EUR
+* A metal case ~15 EUR
 Total: 72

@@ Zeile 30: / Zeile 30: @@
 === The Code ===
-Adafruit (Lady Ada) proposes a library that connects the BME 280 sensor with SPI. I didn't get the BME 280 working, probably because the Ethernet Shield also wirks with SPI. So it is very likely that there is some kind of conflict. This is why I decided to choose the other way: The BME 280 can also be attached via I2C. Cactus.io proposes some example code with I2C which worked fine.
+Adafruit (Lady Ada) proposes a library that connects the BME 280 sensor with SPI. I didn't get the BME 280 working, probably because the Ethernet Shield also works with SPI. So it is very likely that there is some kind of conflict. This is why I decided to choose the other way: The BME 280 can also be attached via I2C. Cactus.io proposes some example code with I2C which worked fine.
 * Here is the original implementation: http://static.cactus.io/downloads/code/bme280/BME280_I2C_Sketch.ino

@@ Zeile 30: / Zeile 30: @@
 === The Code ===
-The SPI hookup of the BME 280 sensor was not attractive as I an very convinced of I2C on the Arduino platform. The Adafruit libraries are focussing SPI, so they are not so well usable. I decided to use the cactus implementation instead.
+Adafruit (Lady Ada) proposes a library that connects the BME 280 sensor with SPI. I didn't get the BME 280 working, probably because the Ethernet Shield also wirks with SPI. So it is very likely that there is some kind of conflict. This is why I decided to choose the other way: The BME 280 can also be attached via I2C. Cactus.io proposes some example code with I2C which worked fine.
 * Here is the original implementation: http://static.cactus.io/downloads/code/bme280/BME280_I2C_Sketch.ino

@@ Zeile 198: / Zeile 198: @@
 [[Image:2016-12-27-envsensor3.jpg|400px]]
 [[Image:2016-12-27-envsensor4.jpg|400px]]
 [[Image:2016-12-27-envsensor5.jpg|400px]]
 [[Image:2016-12-27-envsensor6.jpg|400px]]
 [[Image:2016-12-27-envsensor7.jpg|400px]]

@@ Zeile 5: / Zeile 5: @@
 == Parts List ==
-* Arduino Duemillanove (Atmel 328P)
+* Arduino Duemillanove (Atmel 328P) ~ 15 EUR
-* Arduino Ethernet Shield V1
+* Arduino Ethernet Shield V1 ~ 15 EUR
-* TEMT6000 light sensor
+* TEMT6000 light sensor: http://www.watterott.com/de/TEMT6000-Breakout-Board ~ 5 EUR
-* Watterott BME 280 environmental sensor
+* Watterott BME 280 environmental sensor: http://www.watterott.com/de/BME280-Breakout-Luftfeuchtigkeits-Druck-Tempertursensor ~ 14 EUR
-* DC/DC step down converter
+* DC/DC step down converter ~ 3 EUR
-* two reactor coils to block HF from the DC converter
+* two reactor coils to block HF from the DC converter ~2 EUR
-* passive POE injector
+* passive POE injector, ~ 3 EUR
 == Links ==