LR1121 (ebyte E80-900M2213S) and irq pin

[gjbsolutions]

Hi, the ebyte LR1121 module does not have any IRQ or DIO1 pin. There are only DIO7, DIO8 and DIO9 pins apart from the NRST and BUSY and SPI pins. So, the transmitter code below initializes and 'works', I can see the transmitted packages on an SDR repeating every second but there is a "-5" timeout code error on the serial monitor. Is there a proper way to initialize the module without using the IRQ pin? My setup is an esp32 C3 supermini and the ebyte. Thanks in advance.

`#include <RadioLib.h>

// Pin assignments for the Ebyte LR1121 module
LR1121 radio = new Module(7, -1, 3, 9);  // NSS, DIO1 (IRQ), NRST, BUSY

void setup() {
  Serial.begin(9600);

  // Initialize the module
  Serial.print(F("[LR1121] Initializing ... "));
  int state = radio.begin();
  if (state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while (true);
  }

  // Set frequency
  state = radio.setFrequency(900.0);  // Example for 900 MHz
  if (state != RADIOLIB_ERR_NONE) {
    Serial.print(F("Failed to set frequency, code "));
    Serial.println(state);
    while (true);
  }

  // Set output power to 1 dBm
  state = radio.setOutputPower(1);
  if (state != RADIOLIB_ERR_NONE) {
    Serial.print(F("Failed to set output power, code "));
    Serial.println(state);
    while (true);
  }

  Serial.println(F("Configuration complete!"));
}

void loop() {
  // Transmit a test packet
  int state = radio.transmit("Hello World!");
  if (state == RADIOLIB_ERR_NONE) {
    Serial.println(F("[LR1121] Packet transmitted successfully!"));
  } else {
    Serial.print(F("[LR1121] Failed to transmit, code "));
    Serial.println(state);
  }
  delay(1000);
}`

[jgromes]

On LR11xx, DIO9 is the IRQ pin. Most manufacturers refer to it as IRQ, though for some reason it looks like Ebyte chose not to. Connecting it is required for operation.

[lyusupov]

Ebyte E80 is known to work fine with RadioLib.
One should map DIO9 as IRQ signal and recommended (by User Manual) TCXO voltage setting is 1.8 V