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exploring_lora [2018/10/10 10:17] – [1.2. Software Tools] samerexploring_lora [2018/10/13 09:53] – [4.1. Time on Air] samer
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 For example, the scenario for assessing the impact of the spreading factor on the ToA consists of sending 100 packets for three different spreading factors //e.g.,// 7, 9, and 10, and drawing the average ToA or the distribution in a boxplot for comparing the results. For example, the scenario for assessing the impact of the spreading factor on the ToA consists of sending 100 packets for three different spreading factors //e.g.,// 7, 9, and 10, and drawing the average ToA or the distribution in a boxplot for comparing the results.
 +
 +As for the theoretical computation of the ToA, you can refer to the the following documents : 
 +
 +  * The Semtech [[http://semtech.com/uploads/documents/DS_SX1276-7-8-9_W_APP_V5.pdf| specification]] (section 4.1.1.6) 
 +  * An explanatory video: https://www.youtube.com/watch?v=C_Rh5GSENA4 
 +  * Various calculation tools available online: https://www.loratools.nl/#/airtime, [[https://docs.google.com/spreadsheets/d/1voGAtQAjC1qBmaVuP1ApNKs1ekgUjavHuVQIXyYSvNc/edit?usp=sharing |Spreadsheet]]
 +
 +Note that all messages sent and received by the [[https://www.airspayce.com/mikem/arduino/RadioHead/classRH__RF95.html| RH_RF95 RadioHead]] driver we are using conform to this packet format:
 +
 +  * 8 symbol PREAMBLE
 +  * Explicit header with header CRC (handled internally by the radio)
 +  * 4 octets HEADER: (TO, FROM, ID, FLAGS)
 +  * 0 to 251 octets DATA
 +  * CRC (handled internally by the radio)
  
 <WRAP center round help 100%> <WRAP center round help 100%>
exploring_lora.txt · Last modified: 2021/10/20 12:52 by samer