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wiki:data_transmission
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Table of Contents
Data transmission
Data can be send to end-devices. It can be achieved using the web interface from the Send data menu.
The web interface only displays the last message sent.
The web interface displays all the queued messages.
class A communication
“Following each uplink transmission the end-device opens two short receive windows. The receive window start times are defined using the end of the transmission as a reference.”
“If the network intends to transmit a downlink to an end-device, it will always initiate the transmission precisely at the beginning of one of those two receive windows.”
Extract from the LoRaWan Specification (LoRa-alliance)
class C communication
“Class C devices implement the same two receive windows as Class A devices, but they do not close RX2 window until they need to send again. Therefore they may receive a downlink in the RX2 window at nearly any time, including downlinks sent for the purpose of MAC command or ACK transmission. A short listening window on RX2 frequency and data rate is also opened between the end of the transmission and the beginning of the RX1 receive window.”
Extract from the LoRaWan Specification (LoRa-alliance)
wiki/data_transmission.1508426963.txt.gz · Last modified: 2020/02/21 11:53 (external edit)
