Dear Tamás,

Please find the attached xml file created with the new version. It is having the same problem with only 15 characters received.

The functions that are involved in data reception are as given below.

void Si446x_RX(uint8_t channel)
{
	SI446X_NO_INTERRUPT()
	{
		setState(IDLE_STATE);
		clearFIFO();
		interrupt2(NULL, 0, 0, 0xFF); // TODO needed?
		uint8_t data[] = {
			SI446X_CMD_START_RX,  // value is 0x32 
			channel,              // value is 0
			0,
			0,
			SI446X_FIXED_LENGTH,    // value is 90
			SI446X_STATE_NOCHANGE, // RX Timeout  and value is 0x00
			IDLE_STATE, // RX Valid and value is 0x03
			SI446X_STATE_SLEEP //  value is 0x01
		};
		doAPI(data, sizeof(data), NULL, 0);
	}
}



static void doAPI(void* data, uint8_t len, void* out, uint8_t outLen)
{
	SI446X_NO_INTERRUPT()
	{
		if(waitForResponse(NULL, 0, 1)) // Make sure it's ok to send a command
		{
			SI446X_ATOMIC()
			{
				CHIPSELECT()
				{
					for(uint8_t i=0;i<len;i++)
						spi_transfer_nr(((uint8_t*)data)[i]); // (pgm_read_byte(&((uint8_t*)data)[i]));
				}
			}

			if(((uint8_t*)data)[0] == SI446X_CMD_IRCAL) // If we're doing an IRCAL then wait for its completion without a timeout since it can sometimes take a few seconds. Value of SI446X_CMD_IRCAL is 0x17
				waitForResponse(NULL, 0, 0);
			else if(out != NULL) // If we have an output buffer then read command response into it
				waitForResponse(out, outLen, 1);
		}
	}
}

// Keep trying to read the command buffer
static uint8_t waitForResponse(void* out, uint8_t outLen, uint8_t useTimeout)
{
	// With F_CPU at 8MHz and SPI at 4MHz each check takes about 7us + 10us delay
	uint16_t timeout = 40000;
	while(!getResponse(out, outLen))
	{
		delay_us(10);
		if(useTimeout && !--timeout)
		{
			SI446X_CB_CMDTIMEOUT();
			return 0;
		}
	}
	return 1;
}

// Read CTS and if its ok then read the command buffer
static uint8_t getResponse(void* buff, uint8_t len)
{
	uint8_t cts = 0;
	SI446X_ATOMIC()
	{
		CHIPSELECT()
		{
			// Send command
			spi_transfer_nr(SI446X_CMD_READ_CMD_BUFF); //value of SI446X_CMD_READ_CMD_BUFF is 0x44

			// Get CTS value
			cts = (spi_transfer(0xFF) == 0xFF);

			if(cts)
			{
				// Get response data
				for(uint8_t i=0;i<len;i++)
					((uint8_t*)buff)[i] = spi_transfer(0xFF);
			}
		}
	}
	return cts;
}

Dear Tamás,

Please find the attached xml file created with the new version. It is having the same problem with only 15 characters received.

The functions that are involved in data reception are as given below.

void Si446x_RX(uint8_t channel)
{
  SI446X_NO_INTERRUPT()
  {
    setState(IDLE_STATE);
    clearFIFO();
    interrupt2(NULL, 0, 0, 0xFF); // TODO needed?
    uint8_t data[] = {
      SI446X_CMD_START_RX,  // value is 0x32
      channel,              // value is 0
      0,
      0,
      SI446X_FIXED_LENGTH,    // value is 90
      SI446X_STATE_NOCHANGE, // RX Timeout  and value is 0x00
      IDLE_STATE, // RX Valid and value is 0x03
      SI446X_STATE_SLEEP //  value is 0x01
    };
    doAPI(data, sizeof(data), NULL, 0);
  }
}



static void doAPI(void* data, uint8_t len, void* out, uint8_t outLen)
{
  SI446X_NO_INTERRUPT()
  {
    if (waitForResponse(NULL, 0, 1)) // Make sure it's ok to send a command
    {
      SI446X_ATOMIC()
      {
        CHIPSELECT()
        {
          for (uint8_t i = 0; i < len; i++)
            spi_transfer_nr(((uint8_t*)data)[i]); // (pgm_read_byte(&((uint8_t*)data)[i]));
        }
      }

      if (((uint8_t*)data)[0] == SI446X_CMD_IRCAL) // If we're doing an IRCAL then wait for its completion without a timeout since it can sometimes take a few seconds. Value of SI446X_CMD_IRCAL is 0x17
        waitForResponse(NULL, 0, 0);
      else if (out != NULL) // If we have an output buffer then read command response into it
        waitForResponse(out, outLen, 1);
    }
  }
}

// Keep trying to read the command buffer
static uint8_t waitForResponse(void* out, uint8_t outLen, uint8_t useTimeout)
{
  // With F_CPU at 8MHz and SPI at 4MHz each check takes about 7us + 10us delay
  uint16_t timeout = 40000;
  while (!getResponse(out, outLen))
  {
    delay_us(10);
    if (useTimeout && !--timeout)
    {
      SI446X_CB_CMDTIMEOUT();
      return 0;
    }
  }
  return 1;
}

// Read CTS and if its ok then read the command buffer
static uint8_t getResponse(void* buff, uint8_t len)
{
  uint8_t cts = 0;
  SI446X_ATOMIC()
  {
    CHIPSELECT()
    {
      // Send command
      spi_transfer_nr(SI446X_CMD_READ_CMD_BUFF); //value of SI446X_CMD_READ_CMD_BUFF is 0x44

      // Get CTS value
      cts = (spi_transfer(0xFF) == 0xFF);

      if (cts)
      {
        // Get response data
        for (uint8_t i = 0; i < len; i++)
          ((uint8_t*)buff)[i] = spi_transfer(0xFF);
      }
    }
  }
  return cts;
}

Dear tanagy,

Sorry for late reply. Please find the attached xml file. It works to some extent but the signal strength is hardly -128dBm and only 15 bytes are received with this low signal strength (I have changed the packet field to 64 bytes and even 90 bytes but it didn't help ).

The packet on the transmitter side is as follows:

abcdefghijklmnopqrstuvwxyz0123456789

There is a current spike of more than 100mA on the transmitter side.

The following is received on the receiver side from RX_FIFO. I don't know what is the character Z?
ZabcdefghijklmnoZabcdefghijklmnoZabc
Signal strength: -128dBm

Zahoor

Dear tanagy,

Sorry for late reply. Please find the attached xml file. It works to some extent but the signal strength is hardly -128dBm and only 15 bytes are received with this low signal strength (I have changed the packet field to 64 bytes and even 90 bytes but it didn't help ).

Zahoor

Dear tanagy,

Sorry for late reply. Please find the attached xml file. It works to some extent but the signal strength is hardly -128dBm and only 15 bytes are received with this low signal strength (I have changed the packet field to 64 bytes and even 90 bytes but it didn't help ).

The packet on the transmitter side is as follows:

abcdefghijklmnopqrstuvwxyz0123456789

There is a current spike of more than 100mA on the transmitter side during transmission.

The following is received on the receiver side from RX_FIFO. I don't know what is the character Z?
ZabcdefghijklmnoZabcdefghijklmnoZabc
Signal strength: -128dBm

Zahoor

Dear tanagy,

Sorry for late reply. Please find the attached xml file. It works to some extent but the signal strength is hardly -128dBm and only 15 bytes are received with this low signal strength (I have changed the packet field to 64 bytes and even 90 bytes but it didn't help ).

The packet on the transmitter side is as follows:

dataabcdefghijklmnopqrstuvwxyz0123456789

There is a current spike of more than 100mA on the transmitter side.

The following is received on the receiver side from RX_FIFO. I don't know what is the character Z?
ZabcdefghijklmnoZabcdefghijklmnoZabc
Signal strength: -128dBm

Zahoor

Thanks, Tamas for the reply. 

I am transmitting some test data every 500 milliseconds and printing rssi on the receiver side. When the transmitter is ON I am receiving -128dBm rssi on the receiver side. When the transmitter is OFF, I am getting -132dBm rssi at the receiver side. I don't have 433MHz antenna at the moment so I am using GSM antennae at the transmitter or receiver side. I also tried 15-20cm long wire instead of antennae but I am getting the same result. The transmitter and receiver are both on my table. My radio_config.h is attached.

Zahoor

Thanks, Tamas for the reply. 

I am transmitting some test data every 500 milliseconds and printing rssi on the receiver side. When the transmitter is ON I am receiving -128dBm rssi on the receiver side. When the transmitter is OFF, I am getting -132dBm rssi at the receiver side. I don't have 433MHz antenna at the moment so I am using GSM antennae at the transmitter or receiver side. I also tried 15-20cm long wire instead of antennae but I am getting the same result. The transmitter and receiver are both on my table.

Zahoor

Thanks, Tamas for the reply. 

I am transmitting some test data every 500 milliseconds and printing rssi on the receiver side. When the transmitter is ON I am receiving -128dBm rssi on the receiver side. When the transmitter is OFF, I am getting -132dBm rssi at the receiver side. I don't have 433MHz antenna at the moment so I am using GSM antennae at the transmitter or receiver side. I also tried 15-20cm long wire instead of antennae but I am getting the same result.

Zahor

Thanks, Tamas for the reply. 

I am transmitting some test data every 500 milliseconds and printing rssi on the receiver side. When the transmitter is ON I am receiving -128dBm rssi on the receiver side. When the transmitter is OFF, I am getting -132dBm rssi at the receiver side. I don't have 433MHz antenna at the moment so I am using GSM antennae at the transmitter or receiver side. I also tried 15-20cm long wire instead of antennae but I am getting the same result. The transmitter and receiver are both on my table.

Zahor