<![CDATA[Python GPIO to slow (hx711 interface)]]>At work we have a little CoffeClock, which measures the weight of the coffee machine and show, how much is Coffee is left and how old the coffee is (little arduino project). I wanted to update it and add a website using my omega and python. For this I have to communicate with an HX711. I found a Python Class (https://gist.github.com/underdoeg/98a38b54f889fce2b237) which I modified. The problem is, that with onionGpio I need about 1ms to switch an output high and low.
The HX711 goes into power down state when the signal is high for more then 60µs .... 😞
The question:

  • is there an faster python module?
  • are system calls to fastGPIO faster?
  • should I forget about wasting time with Python and do it in C++?

Thanks Guys for your help!

]]>http://community.onion.io/topic/1014/python-gpio-to-slow-hx711-interfaceRSS for NodeSun, 09 Aug 2026 22:27:28 GMTWed, 28 Sep 2016 13:16:45 GMT60<![CDATA[Reply to Python GPIO to slow (hx711 interface) on Wed, 28 Sep 2016 13:16:45 GMT]]>At work we have a little CoffeClock, which measures the weight of the coffee machine and show, how much is Coffee is left and how old the coffee is (little arduino project). I wanted to update it and add a website using my omega and python. For this I have to communicate with an HX711. I found a Python Class (https://gist.github.com/underdoeg/98a38b54f889fce2b237) which I modified. The problem is, that with onionGpio I need about 1ms to switch an output high and low.
The HX711 goes into power down state when the signal is high for more then 60µs .... 😞
The question:

  • is there an faster python module?
  • are system calls to fastGPIO faster?
  • should I forget about wasting time with Python and do it in C++?

Thanks Guys for your help!

]]>http://community.onion.io/post/6780http://community.onion.io/post/6780Wed, 28 Sep 2016 13:16:45 GMT<![CDATA[Reply to Python GPIO to slow (hx711 interface) on Wed, 28 Sep 2016 22:43:00 GMT]]>@Alexander-Pitzer Use of fastGPIO should definitely be faster.

You might also want to consider the libnewgpio C/C++ code I have published for accessing GPIO - see https://github.com/KitBishop/Omega-GPIO-I2C-Arduino/tree/master/libnewgpio

]]>http://community.onion.io/post/6782http://community.onion.io/post/6782Wed, 28 Sep 2016 22:43:00 GMT