CRC Invalid while updating ConBee III on MacOS

deCONZ General Support
1

Hi,

This is a duplicate to [MacOS] Error flashing firmware · Issue #21 · dresden-elektronik/gcfflasher · GitHub but I guess it’s easier to find support here than on GitHub.

I followed the steps on the Readme.md to build the gcfflasher tool for MacOS.
The build was (I guess) successful, as there were no errors and I can list the device with gcfflasher -l.

Despite listing, the tool doesn’t seem to work. I tried the command for reboot and flash firmware. In both cases, the tool crashes.

./gcfflasher/build/GCFFlasher -r -d /dev/cu.usbserial-DExxx
PL_Connect
connected to /dev/cu.usbserial-DExxx, baudrate: 115200
send: C00D0500090000000000E5FFC0 (13)
send uart reset
send: C00B03000C0005002602000000B9FFC0 (16)
invalid CRC
recv_packet: 0D0500090000094E26 (9)
recv_packet: 818204000100105B77FC (10)
shutdown
PL_Disconnect

./gcfflasher/build/GCFFlasher -f deCONZ_ConBeeIII_0x26510900.bin.GCF -t 60 -d /dev/cu.usbserial-DExxx
read file success: deCONZ_ConBeeIII_0x26510900.bin.GCF (181950 bytes)
GCF header0: magic: 0xCAFEFEED, type: 60, address: 0x00004000, data.size: 181936
GCF header1: product: 0xDEC0DE03, img.type: 61, img.address: 0x00004000, img.data.size: 181900, crc32: 0x7ABA8D12
flash firmware
PL_Connect
connected to /dev/cu.usbserial-DExxx, baudrate: 115200
send uart reset
send: C00B03000C0005002602000000B9FFC0 (16)
recv_packet: 8104000000000001 (8)
recv_packet: 8104000000000001 (8)
recv_packet: 8104000000000001 (8)
invalid CRC
recv_packet: 818204000100105B77FC (10)
PL_Connect
device already connected /dev/cu.usbserial-DE03216114
query bootloader id V3
send: C081027DFFC0 (6)
recv_packet: 818204000100105B77FC (10)
bootloader version 0x00010004, app crc 0xFC775B10

send: C08103B0C60200004000003CAAAAAAAAE0FAC0 (19)
recv_packet: 818300 (3)
recv_packet: 8104000000000001 (8)
BTL data request, offset: 0, length: 256
zsh: trace trap  ./gcfflasher/build/GCFFlasher -f deCONZ_ConBeeIII_0x26510900.bin.GCF -t 60 -d

In both cases, an invalid CRC seems to be the issue. I also tried it with sudo with the same unhappy result.

2

Interesting error, the basic communication seems to work since the recv_packet messages can be seen. I’m not sure yet what’s wrong but will do some tests.

Are you using Intel or Apple Silicon based mac?

3

I’m using a M1 Max (Apple Silicon)

4

I could recreate the crash in Xcode debugger, turns out this was a bug in an assertion in debug builds.

Fix is uploaded now:

https://github.com/dresden-elektronik/gcfflasher/commit/0b4094feca4156b343b2dd88070329d5e2525ac2

5

Thanks a lot for the very fast response and fix! I can confirm, with the fix, the flashing was successful.

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