How to check whether HX711/Strain gauges has problem? about smartknob HOT 5 CLOSED

Also, by the way, for testing the knob without the strain gauges, you can press [space] in the serial monitor to switch to the next mode in lieu of activating the strain gauges.

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The strain gauge thresholds will need to be manually calibrated based on your physical assembly (every build will be different).

The code outputs a HX711 reading value to the serial console once per second by default. You can check that this changes when you touch a strain gauge.

Then once the strain gauges are permanently installed, you can get a reading when nothing is pressed and set this as the "lower" value, and then press down on the knob and get a reading there and set that as the "upper" value here:

from smartknob.

The strain gauge thresholds will need to be manually calibrated based on your physical assembly (every build will be different).

The code outputs a HX711 reading value to the serial console once per second by default. You can check that this changes when you touch a strain gauge.

Then once the strain gauges are permanently installed, you can get a reading when nothing is pressed and set this as the "lower" value, and then press down on the knob and get a reading there and set that as the "upper" value here:

smartknob/firmware/src/interface_task.cpp

Lines 206 to 207 in 5c2a104

	const int32_t lower = 950000;
	const int32_t upper = 1800000;

Hi Scott, your reply saved lots of time, there's no console output for HX711 reading by default, cause the lower and upper values are too high on my side, so the logic for HX711 is not run. After I lower the values, it works. Appreciated for your reminders.

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Also, by the way, for testing the knob without the strain gauges, you can press [space] in the serial monitor to switch to the next mode in lieu of activating the strain gauges.

Yes. I get used to press space to change mode.

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Glad to have helped!

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