Dragino LG01 LoRa User Manual

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LoRa Gateway User Manual ---Update:2017-02-21 37 / 44
10 FAQ
10.1 Why there is 433/868/915 version LoRa part?
Different country has different rules for the ISM band for using the LoRa. Although the LoRa chip
can support a wide range of Frequency, we provide different version for best tune in the LoRa
part. That is why we provide different version of LoRa.
10.2 What is the frequency range of LG01 LoRa part?
The chip used in the LoRa part is:
Version
LoRa IC
Support Frequency
Best Tune Frequency
433
Semtech SX1278
Band2(LF): 410 ~525Mhz
Band3(LF): 137 ~175Mhz
433Mhz
868
Semtech SX1276
Band1(HF): 862 ~1020Mhz
868Mhz
915
Semtech SX1276
Band1(HF): 862 ~1020Mhz
915Mhz
User can set the LoRa within above frequency range in the software.
10.3 How may nodes can the LG01 support?
The maximum support end-node depends on how the communication (how often) between the
end-nodes and gateway. In a lab testing using the simple LoRa example, if the end nodes try to
send data to the gateway at every 5 minutes, there will be data lost after the network has 20~30
nodes due to Channel Collision.
If user want to reach more nodes, user can consider using the polling method to ensure that each
time will only have a LoRa signal transmit in the frequency. If the gateway uses polling method to
get data from the end node, it can support several hundred nodes or more. Examples can see:
Polling example for LoRa.
10.4 What kind of Server the LG01 can support?
The Linux side of LG01 is OpenWrt, it is open source and users can develop application over it.
Basically it can support most IoT servers if use the right API. We have examples for how to
connect some servers via typical protocol (MQTT,RESTful) for IoT, MQTT or RESTful. From this link:
IoT Server Examples.

Dragino LG01 LoRa Specifications

General

Brand	Dragino
Model	LG01 LoRa
Category	Gateway
Language	English