Touch buttons stoped working

[holziholz]

Hello,

I have a strange problem with my current ranger. Updated from 1.16 to 1.17 and the touch buttons stopped working. I can't switch the measurement range or functions like LPF anymore via the touch buttons. The ranger itself works fine. I can change the range through the UART interface as well.

When printing out the touchpad serial output debug info I can see that the buttons reacting. The idle value is around 500, while touching a button will increase the value for this button to 1000.

I also tried resetting the runtime settings, downgrading the FW to 1.16 an 1.15 and of course did a full power reset by disconnecting the battery for a minute. Still the ranger wont change the range when I press the touchpads anymore.

Any ideas?

[Felix]

So you reverted to the original firmware 1.16 and it no longer works?
(Meaning you saved your actual firmware off the device before replacing it)

[holziholz]

Yes, saved the current_fw file from the USB folder, before updateing and later flashed it back.

Since I have a second Ranger available, I checked the touch sensor reading there as well. And the second ranger has an idle value of around 250 instead of 500 as the failing one. But I see no way how I could impact the measured values to get the buttons working again.

[Felix]

Not sure what you mean by idle value.

The only thing that will make a difference in the touch settings should be this line in the firmware:

Code Select Expand

#define TOUCH_HIGH_THRESHOLD  650 //range is 0..1023 (lower is more sensitive)

The touch sampling interval is 50ms.

If you feel the unit is defective you can send it back and I will take a look. Contact me in private for details.

[holziholz]

I don't think that the ranger is defect, since everything else works just fine.
Idle value is the value shown by the logger when the button is not touched.
This value is with 500 for my problem device twice as high as for the working one.
The big question is, what was the value before the FW update when the buttons still worked? And what could cause the ADC to rise, since there is no external circuit on the buttons pins?

[Felix]

Hard to really guess without having the unit and firmware.
If you reflash the old UF2 it should contain everything exactly as before including any "EEPROM" and calib settings.