UprintSE checksum error

[camosquirrel]

Others have mentioned checksum errors when decoding UprintSE eeproms, as in issues 52 and 55. It doesn't work for me either. Can anyone else decode the eeprom (attached, eeprom.log) with carrier id b3 37 bd 0b d0 14 10 c8 to confirm that the problem is specific to me?

Traceback:

user@host:~/Desktop/stratasys/stratasys-master$ python stratasys-cartridge.py info -t uprintse -e c81014d00bbd37b3 -i ../test.bin
Traceback (most recent call last):
File "stratasys-cartridge.py", line 204, in
app.run()
File "stratasys-cartridge.py", line 47, in run
args.func(args)
File "stratasys-cartridge.py", line 134, in command_info
cartridge = m.decode(machine_number, args.eeprom_uid, cartridge_crypted)
File "/home/user/Desktop/stratasys/stratasys-master/stratasys/manager.py", line 74, in decode
cartridge = self.unpack(cartridge_packed)
File "/home/user/Desktop/stratasys/stratasys-master/stratasys/manager.py", line 130, in unpack
raise Exception("invalid content checksum: should have " + hex(struct.unpack("<H", str(cartridge_packed[0x40:0x42]))[0]) + " but have " + hex(self.checksum.checksum(cartridge_packed[0x00:0x40])))
Exception: invalid content checksum: should have 0x9806 but have 0xbc21

I'm reading the chip through the DIAG port, I confirmed with a microscope it is a DS2432. Here's the data by serial port:

er 0 0 0 128
Model carrier ID (8 8-bit values)
000000: b3 37 bd 0b d0 14 10 c8                           .7......

Model carrier in bay 0: 128 bytes at address 0 (128 8-bit values)
000000: 21 3c ef f4 cf 81 24 cb a3 13 f7 5b 4d 72 d9 c9   !<....$....[Mr..
000016: fb e5 b5 26 3e 96 f4 7d d8 6a ee 3c 2c 4c 2e 32   ...&>..}.j.<,L.2
000032: dd f8 6a 3f 49 61 cd db a4 3a c3 26 c9 93 e9 d1   ..j?Ia...:.&....
000048: a4 3a c3 26 c9 93 e9 d1 2a f9 e2 04 b2 a9 b2 cc   .:.&....*.......
000064: 06 98 00 00 00 00 83 73 55 aa 55 c2 e3 52 4b be   .......sU.U..RK.
000080: 9a 08 00 00 00 00 00 00 49 d8 20 57 e9 2b 6c 98   ........I. W.+l.
000096: 86 05 8c 4b 01 00 00 00 53 54 52 41 54 41 53 59   ...K....STRATASY
000112: 53 ba 2c 9c f4 62 35 27 1f 42 88 e2 cb 44 48 e6   S.,..b5'.B...DH.

It may be relevant that the in the referenced issues, the people experiencing checksum fails are also running linux.

[bvanheu]

I think the eeprom id is in the wrong byte order. Try this:

python stratasys-cartridge.py info -t uprintse -e b337bd0bd01410c8 -i ../test.bin

[camosquirrel]

The checksum still appears to be invalid -

python stratasys-cartridge.py info -t uprintse -e b337bd0bd01410c8 -i ../test.bin
Traceback (most recent call last):
  File "stratasys-cartridge.py", line 204, in <module>
    app.run()
  File "stratasys-cartridge.py", line 47, in run
    args.func(args)
  File "stratasys-cartridge.py", line 134, in command_info
    cartridge = m.decode(machine_number, args.eeprom_uid, cartridge_crypted)
  File "/home/user/Desktop/stratasys/stratasys-master/stratasys/manager.py", line 74, in decode
    cartridge = self.unpack(cartridge_packed)
  File "/home/user/Desktop/stratasys/stratasys-master/stratasys/manager.py", line 130, in unpack
    raise Exception("invalid content checksum: should have " + hex(struct.unpack("<H", str(cartridge_packed[0x40:0x42]))[0]) + " but have " + hex(self.checksum.checksum(cartridge_packed[0x00:0x40])))
Exception: invalid content checksum: should have 0x9806 but have 0xb991

Can anyone successfully decrypt the posted eeprom binary? This would establish that the error is particular to me rather than a software bug.

[TheGuardDawg]

Sorry to interrupt 😅 I’ve accidentally locked my uprint canister chips, wondering if anyone might have a couple near empties they’d be willing to send over. Thank you!