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add RSSI spectrum method

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This commit is contained in:
Egor Shitikov
2024-08-02 19:09:43 -07:00
parent a7d3cdfa8c
commit 1ea0ce6d0d
1 changed files with 72 additions and 22 deletions
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94
src/main.cpp
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@@ -26,6 +26,8 @@
// TODO: if % RANGE_PER_PAGE != 0
#define FREQ_END 950
#define RSSI_METHOD false
// Feature to scan diapazones. Other frequency settings will be ignored.
int SCAN_DIAPAZONES[] = {};
// int SCAN_DIAPAZONES[] = {850890, 920950};
@@ -33,12 +35,11 @@ int SCAN_DIAPAZONES[] = {};
// MHZ per page
// to put everething into one page set RANGE_PER_PAGE = FREQ_END - 800
unsigned int RANGE_PER_PAGE = FREQ_END - FREQ_BEGIN; // FREQ_END - FREQ_BEGIN
//To Enable Multi Screen scan
// unsigned int RANGE_PER_PAGE = 50;
// Default Range on Menu Button Switch
// To Enable Multi Screen scan
// unsigned int RANGE_PER_PAGE = 50;
// Default Range on Menu Button Switch
#define DEFAULT_RANGE_PER_PAGE 50
// TODO: Ignore power lines
#define UP_FILTER 5
#define LOW_FILTER 3
@@ -150,6 +151,8 @@ unsigned int diapazones_count = 0;
float freq = 0;
int rssi = 0;
int state = 0;
int result_index = 0;
unsigned int button_pressed_counter = 0;
@@ -571,22 +574,22 @@ void loop()
radio.setFrequency(freq);
// TODO: RSSI METHOD
// Gets RSSI (Recorded Signal Strength Indicator)
// Restart continuous receive mode on the new frequency
// Restart continuous receive mode on the new frequency
// state = radio.startReceive();
//if (state == RADIOLIB_ERR_NONE) {
//Serial.println(F("Started continuous receive mode"));
// if (state == RADIOLIB_ERR_NONE) {
// Serial.println(F("Started continuous receive mode"));
//} else {
//Serial.print(F("Failed to start receive mode, error code: "));
//Serial.println(state);
// Serial.print(F("Failed to start receive mode, error code: "));
// Serial.println(state);
//}
// rssi = radio.getRSSI(false);
// Serial.println(String(rssi) + "db");
// delay(25);
// This code will iterate over the specified frequencies, changing the frequency every
// second and printing the RSSI value for each frequency to the serial monitor. Adjust the frequencies array
// This code will iterate over the specified frequencies, changing the frequency every
// second and printing the RSSI value for each frequency to the serial monitor. Adjust the frequencies array
// to include the specific frequencies you're interested in monitoring.
//A short delay after changing the frequency
//ensures the module has time to stabilize and get an accurate RSSI reading.
// A short delay after changing the frequency
// ensures the module has time to stabilize and get an accurate RSSI reading.
#ifdef PRINT_SCAN_VALUES
Serial.println();
Serial.print("step-");
@@ -595,23 +598,70 @@ void loop()
Serial.print(freq);
Serial.println();
#endif
// start spectral scan third parameter is a sleep interval
radio.spectralScanStart(SAMPLES, 1);
// wait for spectral scan to finish
while (radio.spectralScanGetStatus() != RADIOLIB_ERR_NONE)
// SpectrumScan Method
if (!RSSI_METHOD)
{
//TODO: offload logic here it is non blocking spectral scan
heltec_delay(1);
// start spectral scan third parameter is a sleep interval
radio.spectralScanStart(SAMPLES, 1);
// wait for spectral scan to finish
while (radio.spectralScanGetStatus() != RADIOLIB_ERR_NONE)
{
// TODO: offload logic here it is non blocking spectral scan
heltec_delay(1);
}
// read the results Array to which the results will be saved
radio.spectralScanGetResult(result);
}
// read the results Array to which the results will be saved
radio.spectralScanGetResult(result);
// Spectrum Analizer using getRSSI
if (RSSI_METHOD)
{
state = radio.startReceive(0);
if (state == RADIOLIB_ERR_NONE)
{
// Serial.println(F("Started continuous receive mode"));
}
else
{
Serial.print(F("Failed to start receive mode, error code: "));
Serial.println(state);
}
for (int r = 1; r < RADIOLIB_SX126X_SPECTRAL_SCAN_RES_SIZE; r++)
{
result[r] = 0;
}
result_index = 0;
// N of samples
for (int r = 1; r < 20; r++)
{
rssi = radio.getRSSI(false);
// delay(1);
// ToDO: check if 4 is correct value for 33 power bins
result_index = (abs(rssi) / 4);
// Debug Information
if (false)
{
Serial.print("Frequency: ");
Serial.println(freq);
Serial.println(rssi);
Serial.println(result_index);
}
// Saving max value only
if (result[result_index] < rssi)
{
result[result_index] = rssi;
}
}
}
detected = false;
#ifdef FILTER_SPECTRUM_RESULTS
// Filter Elements without neighbors
for (y = 1; y < RADIOLIB_SX126X_SPECTRAL_SCAN_RES_SIZE; y++)
{
if (result[y] && (result[y + 1] > 0 && result[y - 1] > 0))
// if RSSI method actual value is -xxx dB
if (result[y] && (result[y + 1] != 0 || result[y - 1] != 0))
{
// Filling the empty pixel between signals int the level < 27 (noise level)
/* if (y < 27 && result[y + 1] == 0 && result[y + 2] > 0)