lora-modulation

一个提供LoRa调制特性（带宽、扩频因子、编码速率）的最小包

• 带宽
• 扩频因子
• 编码速率

提供计算空中时间的实用工具。

用法

use lora_modulation::{BaseBandModulationParams, SpreadingFactor, Bandwidth, CodingRate};

let length = 12;
let params = BaseBandModulationParams::new(SpreadingFactor::_9, Bandwidth::_125KHz, CodingRate::_4_5);
let time_on_air = params.time_on_air_us(
    Some(8), // preamble
    true,    // explicit header
    length); // length of payload

// Time on air is 144.384 ms
assert_eq!(time_on_air, 144384);

use lora_modulation::{BaseBandModulationParams, SpreadingFactor, Bandwidth, CodingRate};

let symbols = 14;
let params = BaseBandModulationParams::new(SpreadingFactor::_12, Bandwidth::_125KHz, CodingRate::_4_5);
let timeout = params.symbols_to_ms(symbols);

// Timeout is 458 ms
assert_eq!(timeout, 458);