Like I mentioned this would be development board IoT board for Raspberry PI 2 and Arduino Nano.
Target for this project would be to keep the cost of the component as low as possible.
At this moment I did research for following components with their prices.
- Wi-Fi ESP8266 $1.58
- Temperature and humidity DHT11 $0.99
- Barometric and preasure sensor $1.27
- Sound detection sensor $0.73
- Photosensitive brightness resistance sensor $0.73
- Axis-Gyroscope-Accelerometer $1.75
Please share link if you find lower price then presented.
Please let me know if you would see any other module which can be used in this IoT platform.
While I've not used the DHT11, I have heard enough about it to state that it is notoriously unreliable. The tolerances on its measurements are fantastically huge. IIRC its readings can deviate ten or more degrees Celsius from the actual temperature!
Might I recommend the DHT22 aka AM3202? It /is/ more expensive, but by the same token, it's actually usable... mostly because it stays within far more reasonable tolerances as far as measurement is concerned.