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dB output

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This commit is contained in:
Egor Shitikov
2024-09-17 10:17:25 -07:00
parent 6203bdc33f
commit fa55cb2fd0
6 changed files with 241 additions and 45 deletions
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47
trans_src/main.cpp
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@@ -8,6 +8,7 @@
* This works on the stick, but the output on the screen gets cut off.
*/
#include <Arduino.h>
// Turns the 'PRG' button into the power button, long press is off
#define HELTEC_POWER_BUTTON // must be before "#include <heltec_unofficial.h>"
#include <heltec_unofficial.h>
@@ -15,11 +16,11 @@
// Pause between transmited packets in mseconds.
// Set to zero to only transmit a packet when pressing the user button
// Will not exceed 1% duty cycle, even if you set a lower value.
#define PAUSE 20
#define PAUSE 10
// Frequency in MHz. Keep the decimal point to designate float.
// Check your own rules and regulations to see what is legal where you are.
#define FREQUENCY 866.3 // for Europe
#define FREQUENCY 915 // for Europe
// #define FREQUENCY 905.2 // for US
// LoRa bandwidth. Keep the decimal point to designate float.
@@ -29,13 +30,13 @@
// Number from 5 to 12. Higher means slower but higher "processor gain",
// meaning (in nutshell) longer range and more robust against interference.
#define SPREADING_FACTOR 9
#define SPREADING_FACTOR 7
// Transmit power in dBm. 0 dBm = 1 mW, enough for tabletop-testing. This value can be
// set anywhere between -9 dBm (0.125 mW) to 22 dBm (158 mW). Note that the maximum ERP
// (which is what your antenna maximally radiates) on the EU ISM band is 25 mW, and that
// transmissting without an antenna can damage your hardware.
#define TRANSMIT_POWER -9
#define TRANSMIT_POWER 22
String rxdata;
volatile bool rxFlag = false;
@@ -67,35 +68,41 @@ void setup()
RADIOLIB_OR_HALT(radio.startReceive(RADIOLIB_SX126X_RX_TIMEOUT_INF));
}
int FHSS = 0.25;
float FHSS_counter = -10;
void loop()
{
heltec_loop();
bool tx_legal = millis() > last_tx + minimum_pause;
bool tx_legal = true; // millis() > last_tx + minimum_pause;
// Emulate frequency hopping spread spectrum (FHSS) is a method of transmitting radio
// signals by rapidly switching the carrier between different frequency channels.
float fr = (float)(FREQUENCY + (float)(FHSS_counter));
RADIOLIB_OR_HALT(radio.setFrequency(fr, false));
// Transmit a packet every PAUSE seconds or when the button is pressed
if ((PAUSE && tx_legal && millis() - last_tx > (PAUSE)) || button.isSingleClick())
{
// In case of button click, tell user to wait
if (!tx_legal)
if (button.isSingleClick())
{
both.printf("Legal limit, wait %i sec.\n",
(int)((minimum_pause - (millis() - last_tx)) / 1000) + 1);
return;
fr = 1000;
RADIOLIB_OR_HALT(radio.setFrequency(fr, false));
}
both.printf("TX [%s] ", String(counter).c_str());
// In case of button click, tell user to wait
display.printf("TX[%s]", String(counter).c_str());
radio.clearDio1Action();
heltec_led(50); // 50% brightness is plenty for this LED
tx_time = millis();
RADIOLIB(radio.transmit(String(counter++).c_str()));
RADIOLIB(radio.transmit(String("Putin Huylo!!! LA-LA-LA-LA").c_str()));
tx_time = millis() - tx_time;
heltec_led(0);
if (_radiolib_status == RADIOLIB_ERR_NONE)
{
both.printf("OK (%i ms)\n", (int)tx_time);
display.printf("OK(%ims)/%.2fMhz\n", (int)tx_time, fr);
}
else
{
both.printf("fail (%i)\n", _radiolib_status);
display.printf("fail (%i)\n", _radiolib_status);
heltec_delay(100);
}
// Maximum 1% duty cycle
minimum_pause = tx_time * 100;
@@ -111,10 +118,16 @@ void loop()
radio.readData(rxdata);
if (_radiolib_status == RADIOLIB_ERR_NONE)
{
both.printf("RX [%s]\n", rxdata.c_str());
both.printf(" RSSI: %.2f dBm\n", radio.getRSSI());
both.printf(" SNR: %.2f dB\n", radio.getSNR());
display.printf("RX [%s]\n", rxdata.c_str());
display.printf(" RSSI: %.2f dBm\n", radio.getRSSI());
display.printf(" SNR: %.2f dB\n", radio.getSNR());
}
RADIOLIB_OR_HALT(radio.startReceive(RADIOLIB_SX126X_RX_TIMEOUT_INF));
}
FHSS_counter += 0.250;
counter++;
if (FHSS_counter > 20)
{
FHSS_counter = -10;
}
}