LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
51 of 130
Semtech
www.semtech.com
0x02: LoRa®
Other values are RFU
This command is the first one to be called before going to RX or TX and before defining modulation and packet parameters.
No protocol is defined by default.
This command will only work with the device in Standby RC, Standby Xosc or Fs mode, otherwise it will return CMD_FAIL
in the status of the next command.
8.1.2 GetPacketType
The command GetPacketType( ) returns the current protocol of the radio.
• PacketType corresponds to the modem used for the following RF transactions.
0:None
1: (G)FSK
2: LoRa®
Other values are RFU
8.2 LoRa® Modem Description
8.2.1 LoRa® Modulation Principle
The LoRa® modem uses a proprietary spread spectrum modulation, which permits an increase in link budget and increased
immunity to in-band interference compared to legacy modulation techniques. It has the capability to receive signals with
negative SNR that increases the sensitivity as well as link budget and range of the LoRa® receiver.
8.2.1.1 Spreading Factor (SF)
The spread spectrum LoRa® modulation is performed by representing each bit of payload information by multiple chips of
information. The rate at which the spread information is sent is referred to as the symbol rate (Rs). The ratio between the
Table 8-2: GetPacketType Command
Byte 0 1
Data from Host 0x02 0x02
Data to Host Stat1 Stat2
Table 8-3: GetPacketType Response
Byte 0 1
Data from Host 0x00 0x00
Data to Host Stat1 PacketType
To Next Page
Loading...