Troubleshooting

Plate won’t turn on

1. Charge for at least 30 minutes — the plate may be fully depleted
2. Try a different USB-C cable and charger
3. Hold the button for a full 2 seconds (a quick press does nothing)

Plate not appearing in the app

• Ensure Bluetooth is enabled on your phone/tablet
• Make sure no other device is already connected to the plate (a ZPlate connects to one client at a time)
• Power cycle the plate (off then on)
• On Android, grant the app Location and Nearby Devices permissions

Noisy / drifting signal at rest

• Check the surface is rigid and level — rubber flooring compresses and causes drift
• Perform a tare in the app (Settings → Tare Plates) after the plate has been powered on for at least 30 seconds
• Signal noise floor is ~1–5 N at rest; values in this range are normal

One plate shows zero force

• Check BLE connection — both plates must show as connected in the app
• Power cycle the plate showing zero
• If the issue persists, the load cell or ADC channel may need service — contact support

App disconnects mid-test

• Keep the tablet/phone within 5 m of the plates
• Avoid sources of 2.4 GHz interference (other BLE devices, Wi-Fi routers, microwave ovens)
• The test data captured up to the disconnect is saved; the session may be incomplete

Firmware update fails

• Ensure battery is above 30% before starting OTA
• Stay within BLE range during the entire update (~3–5 minutes)
• If update fails mid-way, power cycle and retry — the bootloader is safe to re-flash

Contact support

Email support@hootuo.com with your device serial number (printed on the underside of the plate) and a description of the issue.