Core Dump and Bluetooth issues
Hello everyone !
I need for my work to be able to control a LoPy4 board using a phone. So I'm currently looking to pair the LoPy4 with my phone (Samsung Galaxy S9).
I'm not used with this kind of board so I'm following the bluetooth chapter of the pycom docs. But when I upload this code :
import ubinascii from network import Bluetooth bluetooth = Bluetooth() bluetooth.start_scan(20)
A core dump error loop occured and I can't upload any new code without reset the board with the firmware plugin. Here the end of core dump error :
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled. Core 0 register dump: PC : 0x401ef77f PS : 0x00060430 A0 : 0x801e0e01 A1 : 0x3ffee9e0 A2 : 0xa4d59534 A3 : 0x3fbc1eec A4 : 0x00060420 A5 : 0x3ffeeaa0 A6 : 0x0000000c A7 : 0x3ffbafd4 A8 : 0xb33fffff A9 : 0x0000cdcd A10 : 0x3ffeb550 A11 : 0x401c027c A12 : 0xb33fffff A13 : 0x0000cdcd A14 : 0x000000aa A15 : 0x3ffeb510 SAR : 0x0000000d EXCCAUSE: 0x0000001c EXCVADDR: 0xa4d59534 LBEG : 0x400934c4 LEND : 0x400934f2 LCOUNT : 0x00000000 ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000 Backtrace: 0x401ef77f:0x3ffee9e0 0x401e0dfe:0x3ffeea50 0x401e12bd:0x3ffeea70 0x401cd10e:0x3ffeea90
Maybe I forgot one step ?
Thank you in advance for your help !
Which firmware version are you using? Pybytes or Pygate?
Is pybytes activated on boot or no?
Can you submit the whole stack trace (from power on reset to coredump and on)?
Is your power supply maybe at fault here? Are you able to supply enough current?
This basic example should work on any device without errors, so I am wondering what is different in your case..
Hi, I'm using the 1.20.2.rc10 firmware version.
I cannot reproduce the error using your example. Can you tell me the firmware version you are running by using
>>>import os >>>os.uname()
(Try to update to the latest firmware version)
But you can use
safe bootto disable the
boot.pyso you can upload new code. This page: https://docs.pycom.io/gettingstarted/programming/safeboot/ explains more on how to do this.