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Code Issues Releases Activity

[Timing Stats] Add duty cycle column + LoRa TTN on air timings

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This commit is contained in:
TD-er
2020-10-13 02:08:23 +02:00
parent 29abb5dbba
commit 0100d26080
9 changed files with 188 additions and 26 deletions
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lib/RN2483-Arduino-Library/src/rn2xx3_handler.cpp
+53 -2
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@@ -441,6 +441,7 @@ bool rn2xx3_handler::setSF(uint8_t sf)
if (dr >= 0)
{
_sf = sf;
_dr = dr;
return setDR(dr);
}
}
@@ -590,10 +591,10 @@ bool rn2xx3_handler::setFrequencyPlan(RN2xx3_datatypes::Freq_plan fp)
default:
{
// set default channels 868.1, 868.3 and 868.5?
returnValue = false; // well we didn't do anything, so yes, false
break;
return false; // well we didn't do anything, so yes, false
}
}
_fp = fp;
return returnValue;
}
@@ -697,6 +698,56 @@ bool rn2xx3_handler::getRxDelayValues(uint32_t& rxdelay1,
return _rxdelay1 != 0 && _rxdelay2 != 0;
}
float rn2xx3_handler::getLoRaAirTime(uint8_t pl) const
{
uint8_t sf = _sf; // Spreading factor 7 - 12
uint16_t bw = 125; // Bandwidth 125 kHz default for LoRaWAN. 250 kHz also supported.
uint8_t cr = 1; // Code Rate 4 / (CR + 4) = 4/5. 4/5 default for LoRaWAN
uint8_t n_preamble = 8; // Preamble length Default for frame = 8, beacon = 10
bool header = true; // Explicit header Default on for LoRaWAN
bool crc = true; // CRC Default on for LoRaWAN
if (sf > 12) {
sf = 12;
} else if (sf < 7) {
sf = 7;
}
if (cr > 4) {
cr = 4;
} else if (cr < 1) {
cr = 1;
}
// Symbols in frame
int payload_length = 8;
{
int beta_offset = 28;
if (crc) { beta_offset += 16; }
if (!header) { beta_offset -= 20; }
float beta_f = 8.0f * pl - 4.0f * sf + beta_offset;
bool lowDataRateOptimization = (bw == 125 && sf >= 11);
if (lowDataRateOptimization) {
beta_f = beta_f / (4.0f * (sf - 2));
} else {
beta_f = beta_f / (4.0f * sf);
}
int beta = static_cast<int>(beta_f + 1.0f); // ceil
if (beta > 0) {
payload_length += (beta * (cr + 4));
}
}
// t_symbol and t_air in msec
float t_symbol = static_cast<float>(1 << sf) / bw;
float t_air = ((n_preamble + 4.25f) + payload_length) * t_symbol;
return t_air;
}
void rn2xx3_handler::set_state(rn2xx3_handler::RN_state state) {
const bool was_processing_cmd = _processing_cmd != Active_cmd::none;