this error bugs me when trying to calibrate joints

Have you tried the latest firmware and the desktop app?

A video of the robot's boot up behavior will help us investigate the problem. If the problem persists, you can email support@petoi.com to schedule a remote session.

Thx. WHen I tried through Ard-IDE, I realised that I put the (RPI-Ardu switch in a wrong position. At least, it was resolved after this change (or after something else)....

After clicking the Calibrate button, the normal log should be as follows:

ardSerial date: Jan 23, 2024

['3', '7', '9']

C:\Users\w***\.config\Petoi already exists

C:\Users\w***\.config\Petoi\defaultConfig.txt

2024-01-31 14:28:29,080 ardSerial - INFO - ['English', 'Bittle', '.\\release', '2.0', 'NyBoard_V1_2', 'Standard', 'Nature', 'Earth']

*** Available serial ports: ***

COM3

Waiting for the robot to boot up

Bittle

N_240123

2024-01-31 14:28:36,716 ardSerial - INFO - Connect to serial port list:

2024-01-31 14:28:36,717 ardSerial - INFO - COM3

re ['c\r\n', '0\t1\t2\t3\t4\t5\t6\t7\t8\t9\t10\t11\t12\t13\t14\t15\t\r\n6,\t-1,\t-1,\t-1,\t-1,\t-1,\t-1,\t-1,\t8,\t-7,\t-1,\t4,\t-8,\t8,\t8,\t-12,\t\r\n']

of 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

15

6, -1, -1, -1, -1, -1, -1, -1, 8, -7, -1, 4, -8, 8, 8,

-12,

re ['c\r\n', '0\t1\t2\t3\t4\t5\t6\t7\t8\t9\t10\t11\t12\t13\t14\t15\t\r\n6,\t-1,\t-1,\t-1,\t-1,\t-1,\t-1,\t-1,\t8,\t-7,\t-1,\t4,\t-8,\t8,\t8,\t-12,\t\r\n']

of 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

15

6, -1, -1, -1, -1, -1, -1, -1, 8, -7, -1, 4, -8, 8, 8,

-12,