exploring_lora
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exploring_lora [2018/10/06 13:43] – [1.1. Hardware Platform] samer | exploring_lora [2018/10/06 14:02] – [4.3. [Classroom activity] Collisions and Packet Delivery Ratio] samer | ||
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Unzip the RadioHead library and copy it to your sketchbook library folder as detailed in [[https:// | Unzip the RadioHead library and copy it to your sketchbook library folder as detailed in [[https:// | ||
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- | <WRAP center round tip 75%> | ||
- | Note well the location of the library folder on your computer. In the following, you will be required to modify source files located in this folder. | ||
- | </ | ||
==== -. Installation ==== | ==== -. Installation ==== | ||
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Connect the two Arduino devices to USB ports on your computer. If this is the first time you use Arduino IDE, make sure to install the necessary USB drivers by selecting '' | Connect the two Arduino devices to USB ports on your computer. If this is the first time you use Arduino IDE, make sure to install the necessary USB drivers by selecting '' | ||
- | Now, you have to choose the '' | + | Now, you have to choose the '' |
<WRAP center round tip 75%> | <WRAP center round tip 75%> | ||
For Arduino Mega 2560, additional drivers for Microsoft Windows can be installed from [[http:// | For Arduino Mega 2560, additional drivers for Microsoft Windows can be installed from [[http:// | ||
</ | </ | ||
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===== -. Theoretical Study ===== | ===== -. Theoretical Study ===== | ||
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==== -. Modifying the Radio Parameters ==== | ==== -. Modifying the Radio Parameters ==== | ||
- | Download the {{ : | + | Download the {{ : |
Take a look at the source code in '' | Take a look at the source code in '' | ||
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</ | </ | ||
- | In order to reduce collisions, configure the central frequency of your LoRa devices as indicated below: | + | In order to reduce collisions |
^ Group Number | ^ Group Number | ||
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==== -. Running Basic Sketches ==== | ==== -. Running Basic Sketches ==== | ||
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In this section, you will measure the Time on Air (ToA) that is given by the time necessary to transmit a message on the radio interface. You will assess the impact of the spreading factor, bandwidth, coding rate, and message size on the ToA. | In this section, you will measure the Time on Air (ToA) that is given by the time necessary to transmit a message on the radio interface. You will assess the impact of the spreading factor, bandwidth, coding rate, and message size on the ToA. | ||
- | Start by implementing a function on the client that measures the time necessary for sending a message. | + | Start by implementing a function on the client that measures the time necessary for sending a message. |
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+ | For example, the scenario for assessing the impact of the spreading factor on the ToA consists of sending 100 messages 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. | ||
<WRAP center round help 100%> | <WRAP center round help 100%> | ||
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The setting for this experiment is unique: | The setting for this experiment is unique: | ||
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* Only one server is required in the classroom. This server should compute the ratio of successfully delivered packets or PDR. | * Only one server is required in the classroom. This server should compute the ratio of successfully delivered packets or PDR. | ||
* All groups are required to use the same frequency, spreading factor, and coding rate. | * All groups are required to use the same frequency, spreading factor, and coding rate. |
exploring_lora.txt · Last modified: 2021/10/20 12:52 by samer