A simple command line tool for lora packet calculation.
So, finally I am tired of the Semtech GUI tool and the customized Excel shits, let's move to the elegant cmdline tool together .
All below parameters are configurable:
- SF5 - SF12 spread factor
- Long Interleaving
- Low Data Rate Optimize
- Header
- CRC
- Prebuilt binary for Windows platform
For windows platform, please install mingw first. A prebuilt binary is included in the repo.
$ gcc lrc.c -o lrc./lrc -h
Usage: lrc [OPTIONS]
-h, --help Help
-v, --version Version 0.0.1
-b, --bw, --bandwidth <uint> Bandwidth in hz, eg: 125000, 250000, 203125
-s, --sf, --spread-factor <uint> Spread factor (5 - 12)
-o, --ldro, --low-datarate-optimize <bool> Low datarate optimize (on / off)
-f, --fs, --fine-synch <bool> Fine synch for high speed lora SF5 and SF6,
-i, --li, --long-interleaving <bool> Available in 2.4GHz lora (sx128x)
-c, --cr, --coderate <uint> coding rate CR4/5 CR4/6... (1 - 4)
-r, --pr, --preamble <uint> Raw preamble lenght
-d, --hdr, --header <bool> Header option (on / off)
-k, --crc, <bool> CRC option (on / off)
-l, --pl, --payload <uint> payload length
./lrc
sf 7, bw 125000, cr 1, ldro off, fs off, li off, pr 8, hdr on, crc on, pl 12
toa: 41216us, 41.216ms, 0.041s
./lrc --sf=12
toa: 1155072us, 1155.072ms, 1.155s
sf 12, bw 125000, cr 1, ldro on, fs off, li off, pr 8, hdr on, crc on, pl 12
./lrc --sf=12 --ldro=off
toa: 991232us, 991.232ms, 0.991s
sf 12, bw 125000, cr 1, ldro off, fs off, li off, pr 8, hdr on, crc on, pl 12
- Original calculator API https://github.com/Lora-net/gateway_2g4_hal/blob/master/libloragw/src/loragw_hal.c#L492
- Some code are copied from https://github.com/JiapengLi/lorawan-parser/blob/master/util/parser/main.c