ESP32 Forum

Hi
I have a project with ESP32 and GY521, powered by an ion-lithium rechargable battery, to measure the angular velocity of a door. All the connections are soldered.
It runs nicely, but when the velocity is high, there is a high slowdown when the door knocks.
Is there any known reason for this ? Is it possible that reset button (EN) inertia cause it?
Thanks in advance
Gustavo Furtado

Sorry. I noticed that I didn´t define the problem...
If I close the door with a somehow high velocity, ESP32 resets itself. Only and always above a certain velocity.
Has somebody have this kind of issue?
My board is Wemos ESP32 D1 Minikit and giroscope is GY-571.

Thanks in advance for any help.

Strange. Perhaps one of your connectors is a bit wonky, and the acceleration makes it loose contact?

Could also be the crystal oscillator, vibrations will modulate the output signal.

Hi ESP_Sprite
There is no conectors. All connections are made by soldering. I already bypassed the on/off switch, thinking like you, but nothing...

Hi PatrikB
I thougth this possibility. I posted this my issue to see if somebody had this problem, to share a possible solution...
I am working on it, but if one have a ligth please share with us...

Thank you for reply you two.

Gustavo

Theoretically, the only other thing I can think of is ceramic capacitors that are microphonic... theoretically, for instance, if the cap on the reset line had this really really bad, it could reset the chip. I doubt that this is the case, it's more of a problem in analog circuits.

To test the hypothesis you could feed the ESP32 using an external signal generator through a flexible coax cable. Or try a MEMS based oscillator which should be more shock resistant than a crystal.

In one design I have seen the oscillator mounted on a cushion of foam to reduce vibrations/shock.

If you have access to a real-time spectrum analyzer you could use that to plot frequency vs. time (spectogram) to see how the oscillator behaves during the door closing.

Your 6050 data goes over an angular velocity limit and crashes the esp32? Try lowering the sensivity in the 6050 setup.
I do fly quadcopters with esp32 + mpu6050 and never have this problem, not even on "hard landings".

Good hint VladTheImpeler. I´ll try to reconfigure 6050 less sensive..
I´ll came back with results...
Thank you all for replies...

Hey VladTheImpeler
And what is the sensitivity of your 6050 (250 to 2000)? I had no success in this direction...
Maybe a poor power supply. What do you use as power supply for your quad-copter? What battery? Some capacitor, what value (uF)?
The answer for this questions may help me.
Thanks in advance...