It turned out great. Lets begin!
Step 1: Parts
-2x Arduino nano.
-433mhz transmitter .
-4x20 LCD (blue)
-a Blue led and resistor
-Electric installation box (watertight).
- Digital Barometric Pressure and Temp Sensor.
- DHT11 Temperature & Humidity Sensor
-1mm Aluminum sheet.
-PIR sensor (movement).
-Bits of wire.
-Heat shrink tube.
-Nuts and bolts.
And a range of different (basic) tools.
Step 2: Code for transmitter
The Arduino Nano was simple, just take a look on the site of Arduino.
Next up is the 433Mhz Transmitter.
On the Board it says:
Next. The DHT11. same as the Transmitter
This part uses the 'DHT11 library'
A Simple LED and Resistor
I used this only if there was something sent.
The Digital Barometric Pressure sensor is another story dhow,
its got 6 Connections
-SDA (Serial Data Signal) (I²C)
-SCL (Serial CLock) (I²C)
-XCLR (no idea) (did not use)
-EOC (end of conversion) (did not use)
So we need to use the I²C on de Sensor to communicate with the Arduino.
i uses the next Libs:
Much of the code to read out the Digital Barometric Pressure and Temp Sensor was ripped form various sites/forums.
For Code and explanation, See the Code file
I forgot something you need to do in order to compile the Arduino code.
In order to convert a float to a string you’ll need to download 2 files and replace some file with these in the Arduino IDE.
Download & info: http://www.timewasters-place.com/arduino-string-and-float/
PLEASE BACK UP YOUR FILES BEFORE REPLACING THEM!!!
Step 3: Electrical diagram transmitter
Please note that the Transmitter and humidity sensor works of the 5v line,
the Barometric sensors only needs a 1.8V - 3.6V input.