Developers have built open-source libraries based on ZK's communication protocol. The TAD (Time Attendance Device) class is a notable PHP implementation that interacts with devices using UDP on Port 4370 . It supports retrieving logs ( get_att_log ), user info ( get_user_info ), and device controls ( restart , disable ). Node.js versions like zk-attendance-sdk also exist, offering easy TCP/UDP socket connections for modern web applications.
Generates daily, monthly, individual, department, and summary reports. Export formats include PDF, Excel, CSV, and HTML. zktime50 attendance management systemver 487 build153
An “invalid floating point operation” error appears during query calculations. Solution: Access the leave type settings under Maintenance/Setup, configure a minimum unit for each leave type, save the changes, exit the software completely, and relaunch. Alternatively, check all time segments to verify that workday counts are not zero. Developers have built open-source libraries based on ZK's
Ensure local port 4370 (UDP/TCP) is open in Windows Defender Firewall. save the changes
For businesses seeking an established, well-documented attendance management solution at an accessible price point, ZKTime50 version 4.8.7 build 153 remains a strong contender in the small business attendance management market.
After downloading attendance records, the number saved in the database is lower than the number reported during download. Solution: This is normal behavior. The software automatically checks for duplicate records during download and removes them. Already-saved records are not saved again.