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wiki:data_transmission [2017/10/17 11:10]
mpe
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-====== Data transmission ====== 
  
-Data can be send to endpoint devices. It can be achieved using the web interface from the //Send data// menu. 
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-The web interface only displays the last message send. 
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-The web interface displays all the queued messages. 
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-===== class A communication ===== 
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-"​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."​ 
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-"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."​ 
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-{{:​wiki:​class_a_transmition.png?​450nolink|}} 
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-//Extract from the LoRaWan Specification ([[https://​www.lora-alliance.org/​ |LoRa-alliance]])//​ 
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-===== class C communication ===== 
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-"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." ​ 
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-{{:​wiki:​class_c_transmition.png?​600nolink|}} 
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-//Extract from the LoRaWan Specification ([[https://​www.lora-alliance.org/​ |LoRa-alliance]])//​ 
wiki/data_transmission.1508231412.txt.gz · Last modified: 2020/02/21 11:53 (external edit)