AFSK not working on LILYGO T3_V1.6.1

[fagci]

Describe the bug
AFSK not working. Close to #190

Using LILYGO T3_V1.6.1. Pinout is same for DIO1, DIO2.
Checked pins using multimeter, 20 Ohms for each ESP GPIO - sx1278 DIO.
Tried to use GPIO12, GPIO25 for DIO2, no luck.
Also tried to set GPIO pins HIGH before transmitting.

To Reproduce

#include <RadioLib.h>
#include <SPI.h>

const uint8_t LORA_MOSI = 27;
const uint8_t LORA_MISO = 19;
const uint8_t LORA_SCLK = 5;
const uint8_t LORA_CS = 18;
const uint8_t LORA_DIO0 = 26;
const uint8_t LORA_DIO1 = 33;
const uint8_t LORA_DIO2 = 32;
const uint8_t LORA_RST = 23;

SX1278 radio = new Module(LORA_CS, LORA_DIO0, LORA_RST, LORA_DIO1);
AFSKClient audio(&radio, LORA_DIO2);

RTTYClient rtty(&audio);

float TXfreq = 434.0;

void setup() {
  Serial.begin(115200);
  SPI.begin(LORA_SCLK, LORA_MISO, LORA_MOSI);

  int state = radio.beginFSK();
  if (state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while (true)
      ;
  }

  state = rtty.begin(434.0, 170, 45);
  if (state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while (true)
      ;
  }

rtty.idle();
  delay(500);
  rtty.println("Test test test");
  rtty.standby();

  // for (int i = 0; i < 10; ++i) {
  //   audio.tone(1000+i * 1000);
  //   delay(100);
  // }
  // audio.noTone();
}

void loop() {}

Expected behavior
Frequency change instead of carrier.

Screenshots

Additional info (please complete):

• MCU: ESP32
• Wireless module type: SX1278
• Arduino IDE version: 2.3.2
• Library version: 6.6.0

[jgromes]

I was able to replicate this issue on a Lilygo T-Beam. The root cause was a breaking change in ESP_IDF > 5.0.0, that chagned the API of the LEDC component which is used to emulate tone(). It is fixed in the comit mentioned above, thanks for reporting!

[fagci]

Thank you for your work! =)