How do I turn on Nybbleâs headlights and ultrasound?
I managed to complete building Nybble and eventually calibrate it đ. It was sometimes frustrating, but fun and very rewarding at the end !
I have a couple of issues with the ultrasound sensor and getting the lights to work
There is a section in the Petoi Doc Center called âUltrasonic Sensorâ that has a picture of the board and Sensor with the connector cable, along with a build video of the head showing the cable connections.
The heavy duty connector cable that I received in kit has very stiff wire and has connector that does not fit into the board socket as shown on the picture in the doc. The connector can only go in one way. The Black Gnd cable connects to D8 on the board, Red one to D7, etc. I had to pull the head apart and reverse fit the connector into the socket. (see attached pic)
When I boot up Nybble the tiny LED behind the Ultrasonic Sensor lights up blue. Thatâs all that happens đą
When I run the Firmware Uploader (in the desktop App) to try change the mode to "Ultrasonic" or "RandomMind_Ultrasonic" it fails. In the file directory PetoiDesktopApp\release\2.0\Nybble\ there is no directory for NyBoard__V1_2 containing the required *.hex files. My board is V1_2 so assume it needs the V1_2 firmware in the App. I have downloaded and installed the latest Petoi Desktop App (Jan 2023)
In the Petoi Skill Composer I can pull down the Eye Color Setter and select colors but nothing happens. The only button that works is âMeowâ
Can anybody please shine a light on this issue?


Success!!!!
I have uploaded the Ultrasonic mode and I can report that the lights are on!!!
Thank your very much for your prompt help and patience with me!
You have also taught me some things and now I want to learn and experiment some more
Thank you Jason!