Added 2 examples (basic use and timeouts) and support for Teensy 3.2

[thomasfredericks]

No description provided.

[amotl]

Dear @thomasfredericks,

we just pushed some amendments [1] to this popular library where we rebundled some pieces which have been loosely floating around here. While being at it, we also cherry-picked your valuable contributions and suggestions which not have been merged yet, thanks again. For more details, please follow the issue referenced above.

As we actually don't have any hardware on our workbench, we will be happy to hear about successful reports from the community running this on a real iron, actually on as much as possible things supported by the Arduino framework. Maybe you can afford some minutes to check whether the status quo works as expected if you still have a MCU and a HX711 breakout around?

We will appreciate your feedback, thanks already.

With kind regards,
Andreas.

[1] https://github.com/hiveeyes/HX711/tree/spring-cleaning

[thomasfredericks]

@amotl Sorry, I cannot test this right now.

One thing I would strongly change in your documentation is to remove all references to analog pins like this one:

// AVR and friends
const int LOADCELL_DOUT_PIN = A1;
const int LOADCELL_SCK_PIN = A0;

This confuses students as they believe that 1) it is an analog input and 2) the loadcell must be connected to an analog pin. Both of there are wrong.

[amotl]

Dear @thomasfredericks,

thanks a bunch for your answer. For things like the pin definition aspect I was exactly asking for in #124 as I felt the documentation or the example sketches provided might also need some facelift here. However, we probably have to take the different boards into account.

So, you mean that having references to the A* pins is complete nonsense? Personally, I am totally clueless as I'm not a hardware guy so I am dependent on your input here whether this would hold true specifically for the Teensy boards or as a general rule for all boards.

Let's hear what @bogde has to say about this.

With kind regards,
Andreas.

P.S.: We will be happy to hear back from you if there's another chance to get the revamped library into the hands of students in the future. All of this is valuable feedback. Thanks again!

[amotl]

Dear Thomas,

while working on #125 in the aftermath of #123, we just added your wait-for-readyness-with-timeout implementation to our spring-cleaning branch by 87727e0.

By using the new wait_ready_timeout(), the corresponding HX711_timeout_example.ino originally contributed by you becomes even more compact now.

With kind regards,
Andreas.

[thomasfredericks]

So, you mean that having references to the A* pins is complete nonsense?

It is not nonsense, it will work but it is just that analog pins are not required. Typically analog pins are only used when require as they are precious. You can use the same pins as the ESP and friends:

// ESP and friends
const int LOADCELL_DOUT_PIN = D2;
const int LOADCELL_SCK_PIN = D3;

[amotl]

Typically analog pins are only used when required as they are precious. You can use the [digital] pins [like you are doing with] the ESP and friends.

Based on your suggestion and after further research, we just removed the attempt to use pin definition constants at all by 83c9f51, see also #124. Thanks again!

[amotl]

Thanks @thomasfredericks, your contributions have been very valuable for the recent work on this library. As being superseded by merging #123, we might close this now.