Setpacketparam; Table 8-7: Coding Rate; Table 8-8: Lowdatarateoptimize; Table 8-9: Setpacketparam Command - Semtech LR1110 User Manual

•
CR configures the Coding Rate

Table 8-7: Coding Rate

CR
0x01
0x02
0x03
0x04
0x05
0x06
0x07
•
LowDataRateOptimize reduces the number of bits per symbol:

Table 8-8: LowDataRateOptimize

LowDataRateOptimize

8.3.2 SetPacketParam

The command SetPacketParam( ) configures the parameters of the RF packet for the selected modem. Since the parameters
are modem dependent, the description hereafter is valid only for the LoRa® modem.

Table 8-9: SetPacketParam Command

Byte 0
Data from Host 0x02
Data to Host Stat1
• PbLengthTX defines the length of the LoRa® packet preamble.
Coded on 2 Bytes, from 0x0001 (1) to 0xFFFF (65535). Minimum of 12 with SF5 and SF6, and of 8 for other SF

advised.
• HeaderType defines if the header is explicit or implicit:
0x00= explicit header (default)

0x01= implicit header

• PayloadLen defines the size of the payload (in Bytes) to transmit or the maximum size of the payload that the receiver
can accept.
LR1110
User Manual Rev.1.0
UM.LR1110.W.APP March 2020
Short Interleaver CR= 4/5
Short Interleaver CR= 4/6
Short Interleaver CR= 4/7
Short Interleaver CR= 4/8
Long Interleaver CR= 4/5
Long Interleaver CR= 4/6
Long Interleaver CR= 4/8
0x00
0x01
1 2
0x10 PbLengthTX
(15:8)
IrqStatus
Stat2
(31:24)
www.semtech.com
Description
LowDataRateOptimize off
LowDataRateOptimize on
3 4
PbLengthTX HeaderType
(7:0)
IrqStatus IrqStatus
(23:16) (15:8)
Overhead Ratio
1.25
1.5
1.75
2
1.25
1.5
2
Description
5 6
PayloadLen CRC
IrqStatus
0x00
(7:0)
7
InvertIQ
0x00
56 of 130
Semtech