Hi. I’m interested in building a home monitoring system, primarily for measuring humidity and temperature. The project calls for a 20 to 30 sensors, many of which will be embedded in the walls and ceilings and not accessible once installed. Real time data and data logging required.
I’m interested to see if there is an Arduino based solution for this. My thoughts are:
Arduino Mega* board.
- Either lots of sensors connected to each digital input.
- Or, I2C or SPI bus sensors.
My initial research tells me directly connected H/T sensors to digital inputs is simple but requires a lot of wiring. A bus system might be possible but the sensors are more expensive.However… In order to reduce total wiring length and complexity, can I connect and read up to 30 humidity/temp sensors on a bus with the Arduino?
If anyone can give me a bit of guidance, that would be great. I’ve never tried building and Arduino system before, but this project seems like a good one to get into it.