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Libre Connect
Download TempHum / LibreConnect / Source

What is temphum ?

Photo temphum
temphum is an USB temperature/humidity sensor.
You can optionally add a photoresistor to measure light.

A version with a small display will be available later.
TempHum Display

Applications

Display temperature and humidity on a web page.

There is a example of a widget here http://madnerd.org/interface/temphum App temphum

Build your own temperature sensor widget using libreInterface

  • Go to libreInterface
  • Import apps/libreInterface/dht11.json
  • Modify the code

libreInterface temphum

All modifications made using the developer console will be saved.
Go to http://github.com/madnerdorg/libreinterface for more information.

How to build temphum ?

Video soldering temphum

Upload

To add the photoresistor change this line in the arduino code

const bool hasPhotoResistor = true;

Components

  • Arduino nano CH340G: 2€
  • DHT11 : 2€
  • Resistor pack 400pcs (3€) (1 resistor: 0.0071€)

Total : 6€ (4€)

Wiring

You need to add a 4,7kΩ resistor between 5v/pin 2.

Wiring_temphum

  • Arduino - 2 : DATA (2)
  • Arduino - 2 : RESISTOR (4,7kΩ) --> VCC (1)
  • Arduino - 5v : VCC (1)
  • Arduino - GND : GND (4)

3D printing

Models by Olivier Sarrailh : https://github.com/madnerdorg/temphum/tree/master/stl

Commands

/info -------> Give name:port

temphum:42004

Once /info is sent , the device will send humidity(%);temp(°c) or humidity(%);temp(°c);light(/1024)

50.00;24.00;600

Licences

temphum.ino

  • Author: Rémi Sarrailh (madnerd.org)
  • Licence: MIT

DHT_sensor_library