HH10D and Frequency output

Other Hardware Sensors
1

Hello !

I have buy a humidity sensor manufactured by HopeRF and named HH10D:

After a google search, i found the following example:
http://tushev.org/articles/electronics/46-interfacing-hh10d-with-arduino

So i try it with my Arduino Uno, no problem with the calibration data reading (use of a logic level converter with MOSFET transistors for i2c) but the Arduino does not measure any frequency on pin D5 (Timer 1 pin used by FreqCounter library).

I don't have any oscilloscope but, i measure 1.7 V on Fout pin with a simple multimeter and then 0v when i connect it to the Arduino board. Is there any adaption needed ?

I search similar problems on different forum but i don't find any post !

Thank you for your help :wink:

2

If the voltage changes when you connect to pin 5 then pin 5 is either set as output or the Arduino is fried... An input pin should not affect the multimeter reading.

3

:astonished: You are right thank you! In fact i use a a test sketch in which i test a lot of thing and in my setup i have left a line code which define pin 5 as an output !

With a proper sketch, it works fine 8) I'm happy because i thought that my sensor was dead but i'm very disappointed due to the fact that i spend time on this problem :cold_sweat:!

Sorry for this useless post ! and thank you again for your answer !

4

My mantra for setting up circuits is to double-check - check once, then assume you missed something and check again. Only then apply the power. setup() code calling pinMode() counts as part of the circuitry really..