Setting up arduino with 2 stop bits

Projects Networking, Protocols, and Devices
1

I am new to Arduino and am trying to set up an Arduino mega to communicate a battery regulator I have but need 2 stop bits. I have sent commands through the arduino serial monitor via usb to a usb to serial convertor supplied by the battery regulator manufacturer and received the correct response. command was 001mi. and response was 01MI 2.762V. Any ideas on how to set this up? Below is a response from the manufacturer.

The signaling is half duplex (party line) async like RS232, but with a
different hardware interface. I previously sent you a schematic of the
interface. Undriven, (space), the two lines are between 10 and 15V
apart, and driven, (mark) they are about 2V apart. There is no "ground"
reference. One advantage of this is that you can use a normal terminal
or terminal emulator program to talk to the Rudman Bus devices: 9600
Baud, 8 bits, no parity, 2 stop bits.
The 12-15V levels on the EviBus signals WILL DESTROY your Arduino if you

try to hook them up directly! The pins that are directly usable are the
RX/TX lines, which are used for the USB on the Arduino.

Yes the TWI interface is serial, no it is not async like rs-232. The
Rudman bus uses async signaling but with different levels.

If you are going to use the Arduino, you will have to use the Rx/Tx

2

From the processor's data sheet it says:-

void USART_Init( unsigned int ubrr) {
/*Set baud rate */
 UBRR0H = (unsigned char)(ubrr>>8); 
UBRR0L = (unsigned char)ubrr; 
//Enable receiver and transmitter */ 
UCSR0B = (1<<RXEN0)|(1<<TXEN0); 
/* Set frame format: 8data, 2stop bit */ 
UCSR0C = (1<<USBS0)|(3<<UCSZ00);
3

Can I put UCSR0C = (1<<USBS0)|(3<<UCSZ00); Right after the serial begin function? Serial1.begin(9600);

4

I don't know try it.

5

It only affects transmission. Are you talking to the device (rather than just listening)?

Just change the one bit:

UCSR1C |=  (1 << USBS1);

And yes, do that after the Serial1.begin.

Mike posted code for Serial device 0, if you are using Serial1 you need to use the "1" registers as shown above.

6

I am suppose to listen to device if there are problems, example low battery. If none are found then send commands repeatedly and then listen for a response.