Serial.read() in Hex format

Projects Programming
1

hello all
I'm sending some data via Serial from one arduino to another via RS485 Bus.
On the master I send a start byte using Serial.print(data[i],HEX); where data[0] is the start byte.
On the slave side I'm expecting the data in something like

void receivedDataFromBus()
{
while(Serial.available() >= 5)
  {
    digitalWrite(controlBusDirection,HIGH);//Enable transmit mode on RS485
    if(Serial.read() ==  0x01)//Expect to receive the start Byte 0x01
      {
      for (uint8_t i = 1; i<= 4; i++) dataBusReceived[i] = Serial.read();//Store all remaining data in an array
      Serial.print(checkCrc(dataBusReceived),HEX);//Calculate the correct CRC 
      delay(40);//Need to give time to empty the serial buffer
      }
   
  }    
  digitalWrite(controlBusDirection,LOW);//Disable transmit mode
}

My problem is the Serial.read reads in decimal format and then this if is never true.
I made some test and if I put were the correct conversion on decimal it works fine, but I prefer to use hex values.
How can I read it in hex format.
Is there any kind of Cast that I can use on Serial.read()?

2

Just use Serial.write() for communication between two devices. There is no need to convert it from HEX to ASCII, then from ASCII back to HEX unless you are actually displaying the values.

Serial.read() doesn't care about how it's formatted, it just takes the 1's and 0's and puts them into 8-bit variable. How you read/interpret them is completely up to you.

3

Works Perfectly.Thanks for your time dude