Dragino LSN50 LoRa, User Manual

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6. FAQ
6.1 Why there is 433/868/915 version?
Different countries have different rules for the ISM band for LoRa. Although the LoRa chip
can support a wide range of Frequencies, we provide different versions of the hardware for
best tune of the LoRa hardware part.
6.2 What is the frequency range of LT LoRa part?
Different LT version supports different frequency range, below is the table for the working
frequency and recommend bands for each model.
Version LoRa IC Working Frequency Best Tune
Frequency
Recommend Bands
433 SX1278 Band2(LF): 410 ~525 Mhz 433Mhz CN470/EU433
868 SX1276 Band1(HF):862~1020 Mhz 868Mhz EU868
915 SX1276 Band1(HF):862 ~1020 Mhz 915Mhz AS923/AU915/
KR920/US915
6.3 How to change the LoRa Frequency Bands/Region?
You can follow the instructions for how to upgrade image .
When downloading the images, choose the required image file for download.
6.4 Can I use Private LoRa protocol?
The stock firmware is based on LoRaWAN protocol. You can use a private LoRa protocol in
LSN50. This section describes an example for base LoRa transfer. It is a reference/demo and
we do not provide further software development support on this topic.
In this demo, we will show the communication between LoRa Shield and LSN50, both of
them using the basic LoRa library. LSN50 will send a message to a LoRa Shield and the LoRa
Shield will print it to the console.