kopia lustrzana https://github.com/sh123/esp32_loraprs
Added setup images into local repo
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# Experimental LoRa APRS ESP32 APRSDroid bluetooth modem and LoRa APRS-IS iGate
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Tiny experimental amateur radio ESP32 based LoRa APRSDroid KISS Bluetooth modem and LoRa APRS-IS iGate server.
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![alt text](https://www.smart-prototyping.com/image/data/5_community/WIFI/101770%20Ra-01/2.png)
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![alt text](images/pinouts.png)
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Can be used in two modes:
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- **as a LoRa APRS client**, you need to use APRSDroid application (https://aprsdroid.org), connect to the modem using bluetooth, data will be re-transmitted through the LoRa radio, this is similar to APRSDroid micromodem - https://unsigned.io/micromodem/, received data will be sent back to the APRSDroid using bluetooth. By having two clients you can not only send your position, but also send and receive APRS messages.
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- note, that there a is **significant frequency drift** on temperature changes for different modules, you need to use **external TCXO** if you are planning to use modules for narrow bandwidths less than 125 kHz or calibrate clients based on server frequency drift report by changing **LORAPRS_FREQ**, which is OK for experiments
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# Test Results
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![alt text](images/setup.png)
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- Antennas
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- Client - rubber duck antenna or mobile antenna on a car roof
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- Server - UHF yagi indoors
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