(12.07.2017, 08:52)admin Wrote: Can you post links to cheaper devices that you've found?
Something like this or this but would require some additional A-to-D conversion device (possibly this 1-wire one if it is supported in the 1-wire LM library?) as the LM4 dosen't has any analogue inputs (which I wish it would instead of the IR port that could not be used).
Another option would be this but would require an RS-232 serial connection and LM4 has 3 X RS-485 ones.