Configure Data Storage & Retransmission
The device supports data storage and data retransmission to ensure data integrity. This section describes how to configure data storage and data retransmission.
Export the Local Data
The device supports storing historical data records locally, which operates normally even when the network is deactivated.
Each device can store up to 1,200 data records.
Prerequisites: Sync the time to ensure the data is stored in correct time.
- Enable Data Storage.
- Tap Write to apply the configuration.
- Return to the homepage and click Maintenance in the lower right corner.
- Click History Data, select the data time
range and click Export to read data.Tip: Since the ToolBox App's data export time range is limited to 14 days, you can export the complete data in segments if the required time range exceeds this limit.
- Click Export to customize a file name, then click OK to save
the historical data as a CSV file (including data source, AC operating
status and environmental data) to your smartphone.
- (Optional) To check the exported record,
click
in the top right corner.
- JSON Command: See UC701 Payload Protocol (JSON), Data Storage Settings.
- LoRaWAN Hex Command:
c5. See UC701 Payload Protocol (HEX), Data Storage.
Enable Data Retransmission
Data retransmission allows the network server to receive data, even after temporary network outages.
Prerequisites: The device join type is OTAA.
- Navigate to Network > LoRaWAN.
- On the LoRaWAN page, enable Rejoin Mode
and set the number of packets sent.
- Enable Data Storage and Data Retransmission.
- Tap Write to apply the configuration.
- When the device detects that the network status is deactivated via the rejoin mode mechanism, it records a data loss time point. Upon reconnection, the device retransmits the lost data according to the data retransmission interval. Retransmission data is reported with timestamps and uses a different format from periodic report data.
- If the device reboots or is repowered during data retransmission, it will resend the entire retransmission dataset once it reconnects to the network.
- If a new network disconnection occurs during an ongoing retransmission, only the data logged during this latest outage will be sent upon reconnection.
- Data retransmission increases the uplink traffic and consumes device energy quickly.
- The default report data retransmission interval is 600s, this can be changed via downlink command.
- JSON Command: See UC701 Payload Protocol (JSON), Data Storage Settings.
- LoRaWAN Hex Command:
c5. See UC701 Payload Protocol (HEX), Data Retransmission Interval.
Query Historical Data
The device supports data retrievability feature to query historical data for a specific time range via downlink command. The retransmission data format includes timestamps and differs from the periodic report format. For details, refer to the Payload Protocol document.