Using Python to retrieve data from an Arduino board (sample code for a DHT)

Project description:

- On one side, an Arduino Uno board, with a DHT sensor to measure Humidity and Temperature
-- ref. Overview | DHT11, DHT22 and AM2302 Sensors | Adafruit Learning System
-- attached the code (.ino) to run on the board side

- On the other side, a computer with a Python script running, to get then to draw the temperature and humidity data
-- Personally, I use the "Anaconda" Python redistribution (ref. http://www.continuum.io)
-- In addition I installed the "pyserial" package for communicating with the Arduino (ref. http://pyserial.sourceforge.net)
-- For drawing the data, I use the matplotlib package (ref. matplotlib: python plotting — Matplotlib 1.3.1 documentation)
-- See screenshot

Enjoy
AL.

TempHumidityPython.py (3.43 KB)

TempHumidityArduino.ino (977 Bytes)

Capture d’écran 2014-06-03 à 23.23.52.png1090×933 150 KB

IMG_0867.jpg2448×3264 1.74 MB

thanks for sharing!

Updated version: now the Python code send parameters to the Arduino program to modify the sampling rate parameter, and to start/stop the logging of data.

My next step: wrapping up the command communication in a utility class (Python and Arduino side). Same to receiving data among a period of time.

AL.

TempHumidityPython2.py (4.25 KB)

TempHumidityArduino2.ino (1.38 KB)

The .ino file attached is empty ...

Sorry about that. I just re-updated the document. Thank you!

alina:
Updated version: now the Python code send parameters to the Arduino program to modify the sampling rate parameter, and to start/stop the logging of data.

My next step: wrapping up the command communication in a utility class (Python and Arduino side). Same to receiving data among a period of time.

AL.

Thank you very much for your code. I get the error :

print str(Inc)+" "+str(ArduinoSerial.isOpen())+" "+str(time.time()-InitTime)
^
SyntaxError: invalid syntax

Did you get it to run ?