mirror of
https://github.com/Genaker/LoraSA.git
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Egor Shitikov
113 lines
4.0 KiB
Markdown
113 lines
4.0 KiB
Markdown
# Lora SA(Spectrum Analyzer)
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RF Spectrum Analyzer using Lora Radio
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RadioLib SX126x Spectrum Scan
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Perform a spectrum power scan using SX126x.
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The output is in the form of scan lines; each line has 33 power bins.
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The first power bin corresponds to -11 dBm, the second to -15 dBm, and so on.
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The higher number of samples in a bin corresponds to more power received
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at that level.
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N in Bin / dBm
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1 -11
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2 -15
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3 -19
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4 -23
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5 -27
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6 -31
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7 -35
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8 -39
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9 -43
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10 -47
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11 -51
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12 -55
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13 -59
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14 -63
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15 -67
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16 -71
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17 -75
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18 -79
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19 -83
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20 -87
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21 -91
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22 -95
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23 -99
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24 -103
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25 -107
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26 -111
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27 -115
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28 -119
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29 -123
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30 -127
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31 -131
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32 -135
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33 -139
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Example:
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step-13 Frequancy:816.25
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Power Bins: 0000,0000,0000,0000,0000,0000,0000,0000,0000,0000, 0000,0000,0000,0000,0000,0000,0000,0000,0000,0400, 0000,0000,0000,0000,0000,0000,0006,001B,000E,0005, 0006,0002,0000,
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The spectrum analyzer performs power measurements in the configured bandwidth.
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The X axis represents frequency in MHZ and Y axis display actual received power.
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In this example above, the frequency span goes from 850 MHz to 950 MHz (that is a 100MHz range), and
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the visual amplitude goes from -11 dBm to -110(-139) according to the datasheet(High sensitivity: down to -148dBm) dBm.
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To show the results in a plot, run the Python script
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RadioLib/extras/SX126x_Spectrum_Scan/SpectrumScan.py
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# VSCode Platform.IO development env installation
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1. Install VSCode
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2. install Platfor.IO extension
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3. Connect ESP32 to USB. Install USB drivers for Windows
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4. Clone this Git Repo or download zip of the sources
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```
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git clone https://github.com/Genaker/LoraSA.git
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```
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NOTE: in you case name will be Just LoraSA. I have LoraSA2 because I already have LoraSA folder
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6. Open the Project with the VS code Platform.IO
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7. Select Proper Environment
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8. Select ESP32 USB Device to program
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Note: It is theoretically possible to program via WiFi and BTH.
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9. Programm your ESP32
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10. Wait until you are done with the compilation and upload.
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Usually takes 1 minute. The first run is slower. It needs to compile all libraries.
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You will have the UCOG SA logo and spectrum analyzing scanning screen when done.
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# Hardware
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Heltec ESP32 Lora V3:
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https://www.amazon.com/Heltec-Development-863-870MHz-ESP32-S3FN8-902-928MHz/dp/B0D1H1FN9Y/
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https://heltec.org/project/wifi-lora-32-v3/
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https://www.aliexpress.us/item/3256807037422978.html
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Battery with Wire JT connector :
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https://www.amazon.com/EEMB-2000mAh-Battery-Rechargeable-Connector/dp/B08214DJLJ
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# 3D printed case
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https://www.printables.com/model/118750-heltec-lora-32-case-for-meshtastic
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https://www.thingiverse.com/thing:3125854
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https://thangs.com/designer/Snake0017/3d-model/Heltec%20LoRa%2032%20Desktop%20%26%20Vehicle%20Enclosure-40844
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or buy :
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https://www.amazon.com/DIYmalls-ESP32-OLED-WiFi-Type-C/dp/B0BR3MQ9BG
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https://www.thingiverse.com/thing:6522462
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# Heltec ESP32 Lora v3 Pin Map
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We are using pin 41 as a Buzzer trigger. Connect buzzer + leg with pin 41 and - leg with the ground (GND). You can change the buzzer pin in the code.
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