Biometric Data not syncing to ERPNext

ok, I checked your data, and sadly, I don't remember if I found and 8 byte record on the wild or just used the documentation.

according the documentation, the 8 byte attendance log is

typedef struct _AttLog_{
 Int PIN; //U16 PIN, user serial number
 char verified;// matching way
 time_t time_second; // time, time encoding is customized time encoding.。
 char status; // attendance condition
}TAttLog, *PAttLog; 

so the 8 byte packet should be "HB4sB" where the third element is feeded to __decode_time and produce your wrong data...

luckily comparing with the get_time response, if we switch the packet order it produces a better response, so the fourth element of "HBB4s" produces a date on 2019-10-01 10:34:50

I'll try to dig an old device to see if it's 8 bytes or not, by the time, please change the line 1563 of base.py

to

uid, status, punch, timestamp = unpack('<HBB4s', attendance_data.ljust(8, b'\x00')[:8])

that should help. (please note the struct change and the response order)

If we can get more devices with 8 bytes to confirm this issue, I'll commit to master.