: If you cannot find a specific version for your serial number, it is recommended to email service@zkteco.com with your device's Serial Number MAC Address , and current firmware version. Key Benefits of Updating ADMS/Push Technology
Do this first: Uninstall your old ADMS. Install ADMS v3.5+. Re-sync your K40 Pro. If the problem persists, then update the firmware. zkteco k40 pro firmware download updated
Updating firmware carries a risk of "bricking" the device if done incorrectly. Follow these steps recommended by ZKTeco: Download Center - ZKTeco : If you cannot find a specific version
: Guides for connecting the device via Ethernet (Default IP: 192.168.1.201 ) or Cloud Server are available on ZKTeco's FAQ page . ⚠️ Caution Before Updating Re-sync your K40 Pro
ZKTeco typically manages firmware updates through their regional support centers rather than a single global direct-download link for every device. To get the most accurate and safe file for your specific hardware version, visit these official portals: Global Download Center : Visit the official ZKTeco Download Center to search for current software and documentation. Regional Support : Many updates are handled by regional offices like ZKTeco Europe ZKTeco Middle East , which often host localized firmware versions. Technical Support Email