• ZS300 Sensor User Guide
Troubleshooting
Troubleshooting

Troubleshooting

This section provides some basic troubleshooting information for the ZS300 Sensor. For API-related questions and issues, refer to the API documentation on the Developer Portal (developer.zebra.com/apis).
Troubleshooting the Sensor
Issue
Possible Cause
Possible Resolution
The LED does not light when the sensor button is pressed.
The sensor button is not being held down for three seconds.
  • Press and hold the sensor button for three seconds until the LED flashes.
  • If the LED still does not light up, the battery might be dead and the sensor should be replaced.
Sensor will not connect with the Bridge despite being within range.
  • Press the sensor button to determine if it is on a task. (LED will slowly blink green or red to show a task has started.)
  • There is too much distance between sensor and bridge.
  • The bridge is not connected to the Cloud.
  • If the sensor is not on a task, the sensor may be asleep. Press and hold the sensor button for three seconds until the LED flashes.
  • If the sensor is on a task, it should automatically connect to a Bridge.
  • Ensure the Sensor and Bridge are not too far apart and out of Bluetooth range.
  • Ensure the Bridge is connected to the Cloud. If not, check bridge network connection.
  • Reboot the Bridge by unplugging and re-plugging power.
Sensor will not connect with an Android device running the Electronic Temperature Sensor Android Service despite being within range.
  • The Android device's Bluetooth is not turned on.
  • Press the sensor button to determine if it is on a task. (LED will slowly blink green or red to show a task has started.)
  • There is too much distance between the sensor and Android device.
  • The Android device is not connected to the Cloud.
  • Proper permissions have not been given to the Android mobile application to enable Bluetooth.
  • Ensure Bluetooth is turned on in mobile device.
  • Ensure the Electronic Temperature Sensor Android Service is running on the device and has been granted the necessary permissions.
  • If Sensor is not on a task, the sensor may be asleep. Press and hold the sensor button for three seconds until the LED flashes.
  • If the sensor is on a task, it should automatically connect to the Android device.
  • Ensure the Sensor and Android device are not too far apart and out of Bluetooth range.
  • Ensure Android device is connected to the Cloud. If not, check Android device network connection. The ZSFinder App requires access to scv.zpc.zebra.com, port 443 and api.zebra.com, port 443.
  • Ensure proper permissions have been given to the Android mobile application to enable Bluetooth.
Sensor does not appear in a Scan Nearby search.
  • The sensor button is not being held down for three seconds.
  • There is too much distance between the Android device and sensor.
  • Bluetooth is not enabled on your Android device.
  • Proper permissions have not been given to the Android mobile application to enable Bluetooth.
  • Press and hold the sensor button for three seconds until the LED flashes.
  • Ensure there is proper distance between sensor and bridge so they are within Bluetooth range of each other.
  • Ensure Bluetooth is enabled on your Android device (if no sensors appear).
  • Ensure proper permissions have been given to the Android mobile application to enable Bluetooth.
  • Run another scan.
Sensor stopped collecting data before the task was finished.
  • Sensor has already collected the maximum number of data samples (for example, 16,000 samples), if not programmed to overwrite.
  • Temperature fell below operating temperature range.
  • Ensure the user understands rate of sampling and how that affects how long it takes to collect the max number of samples. (Understand enabling and disabling loop overwrite and letting the user go back to overwrite older samples. Understand also that alarms are never overwritten.)
  • Return sensor to operating temperature range. Keep in mind that temperature sampling will not resume after the sensor returns to operating temperature range. Additionally, if the sensor falls below the operating temperature range while on a task, a brownout condition (loss of power while on a task) occurs and the sensor cannot be re-used.
Unable to stop a task for a sensor.
  • Sensor is not in range of a bridge.
  • There is too much distance between the Android device and sensor.
  • The network is blocking communications to the Cloud.
  • Move sensor within range of a bridge or Android mobile device.
  • Work with your network administrator to ensure that you can properly access the required Zebra Savanna Cloud servers.
Sensor is not starting a task.
  • Sensor is not within range of a bridge.
  • Sensor is not on.
  • Sensor is set up for delayed start (for example, time, temperature, sensor button-press).
  • Sensor is below -25°C (-13°F).
  • Move sensor within range of a bridge.
  • Press and hold the sensor button for three seconds until LED flashes.
  • Verify start time.
  • Ensure sensor is above -25°C (-13°F).