Is there any other way to integrate raspberry pi with mq sensors?? I've been successful with one mcp3002 and one mq-2 sensor but is it possible to add another mq sensor (mq4,mq6) and should i provide more ADC?? I tried to plug two different mq sensors (mq-2 and mq-6) to one mcp3002 but all I got was one same value. Could somebody share his/her experience about sensors with me?? Thanks.
This is my current circuit on my Pi:
The detailed schema I use:
The code and the library I use (basically both the mcp libraries are the same, except the channel part at lower lines)
and here is the compilation result
sorry for the long post :)