Questions tagged [baudrate]

Often misused term, when "bit-rate" is meant.

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473 views

What is the speed of a baud rate? - RN42

After wondering/researching about this for days, I finally ask this question: What is the speed (bits per second) of a bluetooth SPP RN-42 device? Is 1 baud = 1 bit (thus 9600 baud = 9600 bits per ...
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3answers
3k views

Is there a way to change baud rate of a Bluetooth module wireless?

Or is there any other trick to do it? I need to change a baud rate of my Bluetooth module, I have tried it via Windows Bluetooth settings of the particular Bluetooth device, but that doesn't work. ...
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1answer
2k views

What are the considerations for choosing Bluetooth baudrate?

I have an Arduino UNO which will be using an HC-05 bluetooth module to connect to a program running on PC. Its baud rate can be configured from as low as 4800 to as high as 1382400. I know that there ...
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1answer
201 views

what is the digital communication format that the bluetooth module communicates with

I am using ATtiny2313 microcontroller along with a bluetooth module(HC-05) to communicate with my laptop. Heres my doubt, How does the bluetooth module communicate with the laptop. i.e. what is the ...
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1answer
340 views

wireless sensor baud rate calculation

I need to calculate baud rate of wireless sensor which operates on 433.92Mhz and uses OOK modulation. Signal wave form and packet structure are known. Packet = 36bit (44.7ms), each bit consists of 2 ...
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1answer
282 views

baudrate calculation from frame timings

I'm working to interface with an old serial protocol. All I have actually is the frame format and various timings. I need the baudrate to sync correctly and use the data properly. My frame is 15 ...
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2answers
360 views

PIC24 Primary Oscillator XT_PLL frequency is off by 3 percent

I am using a PIC24. After solving the issue with the PLL (PIC24 PLL module is always out of lock) I am struggling with large variation in the system frequency. I wrote a small code that is used to ...
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1answer
1k views

Baudrate and BTR0/BTR1

I am creating an application that uses standard function that sets bitrate. The parameters required are BTR0 and BTR1. But the user of my application will enter the standard value of the Baudrate (eg. ...
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2answers
512 views

Why is the data rate a function of the length of the transmission line?

The length of a transmission line is limiting the highest possible data rate on that line. Why are faster signals more likely to become corrupted on long transmission lines than on shorter ones, with ...
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1answer
208 views

How to ensure serial transmission and reception of required data without any garbage values in the 8051?

I'm trying to continuously transmit the character 'L' from the microcontroller 8051 to the PC at a baud rate of 9600. The frequency of the 8051 is 16 MHz, and I accordingly loaded the BRL register ...
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1answer
325 views

Changing BaudRate in both sides simultaneously

Through the C# interface i want to change the baudrate, to do that ofcurse i have to change the baudrate in the other side which is MSP430 using CodeCompserStudio and to send an Ack to PC then I ...
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4answers
67k views

Baud rate calculation [closed]

I have an exam tomorrow and I'm confused on the following question, that may be asked in the exam: One byte data with parity bit by using asynchronous serial transmission with two stop bits. For 2K-...
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2answers
3k views

msp430g2553, how can I get a UART baud rate higher than 9600?

I have an msp430g2553 in its launch pad. I have tried using a baud rate of 19200 with the UART and I get gibberish. From what I have found, something with the launchpad or drivers limits the UART baud ...
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2answers
1k views

How fast should I feed 74HC164 for driving LEDs?

I want to ask about bitrate for 74HC164. I want to drive LEDs with it. Circuit will be similar to this: How fast CLK rate / bitrate can I use in this circuit? I know that LEDs have some capacitance.
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2answers
11k views

Is there any reason why using a baud rate of 31250 on an Arduino MIDI project could cause problems?

I have a 600 pulse per revolution optical encoder (and some other stuff) connected to an Arduino Uno (tried it on r2 and r3) through the interrupt pins 2 and 3. While waiting for a my MIDI jack to ...
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3answers
2k views

arduino IDE isn't able to load skethes to my arduino mega board

I made a big mistake: I've written a small sketch just to play with my new arduino mega 2560. The sketch worked fine but a bit slow, so I thought that if I increase the baud-rate I will get faster ...
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2answers
316 views

Any negatives using a Triac to transmit square wave?

I want to use a TRIAC as a switch to open a gate to transfer a 9600 baud rate square wave (for a uart communication between two avrs). Currently I'm using dc relay, but I'd like to use the Triac to ...
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1answer
508 views

Baud rate for at89c2051 using 24 MHz oscillator

What is baud rate of AT89C2051 using 24 MHz crystal oscillator in Timer 0 mode? I have seen this post about calculating baud rate of microcontroller but I don't understand it. How to find / set baud ...
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2answers
741 views

Xbee not responding timely. Large delay between each transmission

I have prepared a setup for 2 Xbees one connected to the PC via XCTU and the other interfaced with Atmega 168. The terminal software will send 1 and the xbee with Atmega 168 will return 1. The code ...
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2answers
2k views

How to increase throughput of xbee?

I'm doing a project on live audio streaming through xbee. The baud rate we are using is 115200. Audio transmission works perfectly through wired UART connection. But when we performed wireless ...
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1answer
30k views

Controller Area Network (CAN), high speed and low speed

Is the difference between high- and low-speed CAN only with respect to baud rate values? Is the CAN transceiver programmable for a range of speeds or is it fixed for a specific value? For example, can ...
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1answer
196 views

AVR Dragon: Debug Frequency?

I think of buying an AVR Dragon or an AVR JTAG ICE MKIII. But before I do this, I need to know what side effects the reduced debug frequency has on an ATMEGA328P while debugging. I make heavy use of ...
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2answers
1k views

Baudrate of DS18B20

I'm trying to connect a DS18B20 to my Beaglebone Black. Now I wan't to determine the Baudrate but can't find it in the Datasheet of the DS18B20. In the internet I saw different ones (9600, 19200). ...
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1answer
8k views

Is it possible to have any CAN baudrate?

Is it possible to have any CAN baud values? e.g. 507 baud If not, on what basis is the standard values are derived?
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1answer
552 views

FT230X Baud Rate Aliasing

I'm using a FT230X UART, and I'd like to use it with a non-standard baud rate. I came accross this note, explaining that I have to modify the driver file, but even with this documentation I have some ...
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1answer
3k views

What is a baudrate and what is an Xtal Frequency?

I'm programming my LPC1313 MCU with Flashmagic on my mac and I am asked to put in the baudrate along with the Xtal frequency. I'm not sure what those are and when I looked in the data sheet I found no ...
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1answer
3k views

find TH1 in AT89s52 micro controller in serial communication

I want to establish serial communication between an 8-bit microcontroller, AT89S52, and a PC. I am using a crystal oscillator of 8 MHz frequency. For baud rate calculation I have used the following ...
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3answers
19k views

High-speed computer interface with an Arduino

I'm planning a project with an Arduino that involves handling a lot of requests from a host computer, and the standard 115200 maximum baud over serial isn't sufficient. I'd like to be able to get ...
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1answer
605 views

Renesas RL78 SPI Baudrate Change

I am using an Renesas RL78 and SPI to communicated with an SD card. I have the driver working using the single command Baudrate of 400kBaud when sending both commands and data. Of course, this is ...
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5answers
5k views

Nyquist theorem, seems wrong to me

For Nyquist theorem, for channels without noise the bit rate is: \$N=2B\log_2(L)\$ N= bit rate, B= bandwidth, L= number of levels Intuitively I say that it should be: \$N=B\log_2(L)\$ ...
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2answers
2k views

does PIC require MAX232 for uart?

Sorry for the stupid question but, I'm interfacing a PIC18f46k20 to an Atlas pH sensor module. Both are running on 3.3v. Must I use a max232 between or can the pic talk 232 directly to the module? ...
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3answers
2k views

Does Bluetooth range increase with lower baud rate?

I am using two Bluetooth dongles for an Arduino project of mine. I am only sending a single int over the connection so it does not need to have a high baud rate. If I use a baud rate of 1200 will ...
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2answers
9k views

How set the baud rate for serial communication in ATmega32u4

I have a teensy 2.0 board and am trying to use it to control this LCD through serial TTL. I got it to work fine with my Arduino uno and some sample Arduino code, but I want to do it with the teensy ...
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5answers
4k views

Serial to USB converter

I have a DSP kit with a serial connection. Since, I am operating on my laptop, I do not have access to a serial port. So, I would require a Serial to USB converter How do I create a Serial to USB ...
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1answer
391 views

Another Baudrate Issue, when switching from 9600baud to 300baud

I am communicating with an 8051 MCU via a CPU. When I i/p a character on the Keyboard, I expect the MCU to transmit a character string back to the CPU, which I can view from the terminal window., one ...
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1answer
596 views

How to determine baud rate of microchip peripheral at runtime?

I'm using a PIC24H Microchip microcontroller to communicate via UART with a Bluetooth Module. The Bluetooth module's baud rate can be configured at runtime via software (over bluetooth or over UART) ...
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1answer
4k views

how do I change baud rate for bluesmirf without connecting to pc?

Hi I have the sparkfun bluetooth mate silver. I am trying to start working on control via bluetooth for my Arduino. Only thing is I need to set the baud rate for the bluetooth mate, all guides I can ...
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2answers
4k views

Baud-rate for 8051 Microcontroller

I will like to know if a baud-rate of 9600 is so fast for an 8051 MCU using an 11.0952Mhz crystal. Why? I have observed some inconsistency in the behavior of my MCU, in that when I send a set of ...
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3answers
10k views

Baudrate Calculator

I need to know what the value of TH1 and TL1 should to set the baudrate of an 8051 controller to 115200 Hz. I'm using an ...
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6answers
4k views

Symbol rate (baudrate) estimation

I am looking for a algorithm that can detect the rate of symbols in a base-band signal. The Gardner method is a way to cancel out the timing drift and synchronize the receiver to sender when the ...
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3answers
3k views

MSP430 serial communication failing in cold weather

I have a product using the MSP430 microprocessor, which has been selling for a couple years now. One of the MSP430's jobs is to communicate over async serial to a low-power radio. With the onset of ...
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3answers
17k views

What is the maximum acceptable baud rate error for RS-232 serial communication?

What is the maximum clock difference between a transmitter and receiver for error-free asynchronous serial communication?