4.5.5 Data Retransmission
AM300 series sensor supports data retransmission to ensure network server can get all data
even if network is down for some times. There are two ways to get the lost data:
Network server sends downlink commands to enquire the historical data for specifying time
range, see section 6.4;
When network is down if no response from LinkCheckReq MAC packets for a period of time,
the device will record the network disconnected time and re-transmit the lost data after
device re-connects the network.
Here are the steps for data retransmission:
1. Ensure the device time is correct (see section 4.3);
2. Enable data storage feature and data retransmission feature;
3. Enable rejoin mode feature and set the number of packets sent. Take below as example, the
device will send LinkCheckReq MAC packets to the network server at least every 30 mins to
To Next Page
Loading...
