To see this working, head to your live site.

Frustration level: very high

Hi, I'm highly frustrated. I have batteries with enough voltage (measured it).

The first problem: I'm loosing connection through the serial monitor every few minutes. Closing and starting it again. Starting whole procedure from the beginning. Really annoying.

The second problem: I managed to calibrate properly but if I give any order like "d" to Nybble it moves like insane and everything is chaos.

Can you help me?

41 comments

Comments (41)

dave

Jun 02, 2019

I bought some Enerpower 14500 850mAh - 2,4A batteries and managed to complete calibration. I can now reliably switch between poses and the servos return to the correct position each time.

However, I have noticed that the Nyboard resets sometimes when all the servos move either when running the WriteInstinct program or the Nybble program (Nybble beeps and I see the same text in the serial monitor as when I reset the program).

I'm guessing that the power drain causes a brownout on the controller. @Rongzhong Li is this expected? Is there a workaround?

Rongzhong Li

Jun 02, 2019

Replying to

Yes, you can refer to this post to improve circuit stability.

dave

Jun 02, 2019

Replying to

I guess this is the same issue as https://www.petoi.com/forum/clinic/partially-alive

dave

Jun 02, 2019

Replying to

Thanks @Rongzhong Li I think I'll try adding an additional capacitor first as that seems to have less of a downside than the reconfiguration.

dave

May 26, 2019

Wow, that's really unintuitive. I hit the same issue as Boris today with Nitecore 14500 Li-ion Battery 850mAh NL1485. I've just ordered some Enerpower 14500 850mAh - 2,4A batteries.

Felix Cat

May 22, 2019

Ok, I got new batteries. Sanyo, unprotected. Calibration is working, BUT the connection is very unstable. How can I improve that? The serial monitor is not reacting after 30 seconds.

Rongzhong Li

May 22, 2019

Replying to

What’s the behavior of “unstable?”

Boris Jülich

May 21, 2019

Update: Finally it works! As assumed, rootcause had been the protected batteries.

Type: Enerpower 14500 850mAh - 2,4A WORKS!

h.grote

May 21, 2019

Replying to

Thanks for your update, Boris! I ordered the same batteries now and hope to see Nybble alive in a few days :)

franke

May 21, 2019

Hi all,

it*s very intersting that using protected and not protected "batteries" matters. To me it's just like the color of the battery make any difference :) Anybody can explain WHY protcted or not protected are behaving different?

By the way.... I have build a catmini version which worked well using a powerbank (5 V, 1.5 A output max.)

At the moment I am struggeling with a catmini based "Fan Cat" using the Nybble code with eeprom extension and 2 18650 batteries or a powerbank as energy source.

Bella

Rongzhong Li

May 29, 2019

Replying to

Try to use your original code without I2C EEPROM. But later if you want to use it, you will need to keep it in the codes. Try the test EEPROM sketch in moduleTest.