Users Manual

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LSN50 LoRa Sensor Node User Manual 48 / 55
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
915 SX1276 Band1(HF):902 ~928 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.