Failure Solution Best !!better!! — Zkteco Authentication

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| | Meaning | Best Solution | |----------------|-------------|-------------------| | -307 | Connection failed (often due to network issues or device not responding) | Check network connectivity, ensure the device is powered on, and verify the device IP address. For detailed -307 error troubleshooting, check if your device requires the Pull SDK. | | -10054 | WSAECONNRESET – connection reset by peer (usually a duplicate IP address or device sleep mode) | Check for duplicate IP addresses on your network. Restart the device and assign a static IP address. | | -6 | Wrong password | The communication password configured in the device's "Security" menu does not match the password used by the software. This can occur if a default connection password has been implemented in newer firmware updates. | | -10 | Transmitted data length is incorrect | Ensure data transmission buffers are set correctly; may require adjusting SDK parameters. | | -5 | Data already exists | The user ID or fingerprint template already exists in the device. | | -4 | Space not enough | Device storage is full; delete old logs or user data. | | -3 | Error size | Data packet size mismatch; update SDK or firmware. |

Facial recognition devices require adequate and consistent lighting. Direct sunlight, backlighting, or shadows across the face can prevent successful authentication. Position devices away from windows with direct sun exposure and ensure ambient lighting illuminates the user's face evenly. zkteco authentication failure solution best

Position your finger so it completely covers the sensor area with the core of the finger (the center of the spiral of ridges) at the sensor's center. Keep the finger flat, not on the tip or slanted. Use the index, middle, or ring finger, as thumbs and pinkies are often clumsy on the sensor.

Authentication can succeed at the biometric level while access control still denies entry. This scenario requires examining the device's permission settings rather than the biometric recognition system itself. This public link is valid for 7 days

Here is the best-in-class guide to resolving ZKTeco authentication failures and getting your team back to work. 1. Clean the Hardware (The "Quick Fix")

The way a user places their finger on the sensor significantly impacts recognition accuracy. Common mistakes include placing the finger at an upright angle, placing it sideways, or using only the fingertip tip rather than the flat pad of the finger. Users should place their finger flat on the sensor surface, avoiding fast movements or sliding motions. The finger should be pressed firmly but not excessively hard, and the entire fingerprint should make contact with the sensor. Can’t copy the link right now

ZKTeco recommends enrolling fingerprints with careful attention to placement. When enrolling, users should place the finger in the proper position, ensuring the core of the fingerprint makes full contact with the sensor. The device typically requires multiple presses of the same finger to create a comprehensive template.

Electronic locks and biometric scanners pull significant current. Insufficient voltage causes the sensor to misread data.