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Questions tagged [serial]

In serial communication data is transmitted as a sequence in time. Main advantage: much less wires needed. Main disadvantage: Higher bandwidth for the same throughput.

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2answers
473 views

DB9 Serial communication

I am getting some strange character displays on hyper terminal, after establishing communication with my GSM modem using the appropriate baud rate. When I type "AT", it appears to get repeated or ...
6
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4answers
1k views

Trying to figure out available resources on MSP430 LaunchPad

I'm just starting to mess with the MSP430 and have some simple apps working fine. However, now I want to use it with an LCD and am trying to determine if I'm short on I/O. For sure, I'll need to use ...
6
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6answers
11k views

How can I send data to the arduino from the computer?

How can I send data to the arduino from the computer? I'm thinking sort of a prompt on the command line and some commands like "led1 on". Then, the arduino would process that and light up a certain ...
5
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1answer
1k views

Efficient decoding of a Manchester-encoded serial link?

What's an efficient algorithm for recovering the clock and decoding Manchester-encoded data?
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3answers
883 views

Arduino Serial TX to iPhone RX voltage drop?

Articles I read about this tell me to hook up a 1KOhm resistor between the Arduino's TX and the iPhone's RX. I understand this is because Arduino's signal is 5V and I want 3.3V going to the iPhone. ...
3
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2answers
519 views

Recommend a Serial to USB cable/converter that works with modern OSes [closed]

I'm hacking on a board that has an RS232 interface (via a Max232 chip). My new computer doesn't have a serial port, which leaves me using USB. I actually have a Serial to USB cord already, but it ...
3
votes
1answer
532 views

Interfacing 16C554 UART to ARM based CPU

Due to deficit of UART's on my board (LPC3141 based) I have the idea to add external multi-channel UART. It has data and address lines, which I'm pretty sure needs to be connected to EBI. ...
2
votes
1answer
291 views

Serial brick camera

I bought this serial electronic brick camera from Robot shop recently. I connected it to a Spark Fun FT232R shield. I am able to open my virtual COM port but I am not able to capture any images. This ...
1
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1answer
2k views

Is there a USB interface for a RadioShack 22-812 Digital multimeter?

I have a RadioShack 22-812 Digital Multimeter which has a Serial PC Interface. Is there any sort of adapter that I can use to connect it to a computer's USB port instead of using the Serial Port?
3
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2answers
5k views

Arduino Serial Buffer Overflow

Can I detect whether bytes are getting dropped by the Arduino Serial driver because of buffer overflow (i.e. if I'm not keeping up with my input stream)? If so, how?
6
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2answers
6k views

Serial (UART) communication

I just have a few general questions that those with more experience could easily answer. I am working with an arduino, and interfacing with various devices such as the PC that I use to write the ...
7
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3answers
16k views

Is it possible to send characters through serial to go up a line on the console window?

I think it is possible due to how I can run vi straight from my serial port looking via TeraTerm. There, I can edit some text, go to the next line, then come back and edit the first line! How do they ...
3
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6answers
2k views

Monitoring two serial lines at the same time

First this is the setup: (please note that one of the grounds is not connected, both FTDIs working properly) Now, I have used PuTTY to look at these two serial streams, both exchanging data at 9600 ...
6
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6answers
13k views

Using an Arduino to read data from serial device then send data over bluetooth

So from a general high level standpoint I need to grab data from a serial device and then send this data over bluetooth. I have a bluetooth modem picked out. I understand how to hook it up to the ...
8
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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 ...
6
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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?
15
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2answers
37k views

How does TTL serial work?

I've been trying to find a good description of the TTL serial "standard" without much luck. I understand that serial transmit (TX) and receive (RX) lines idle high (at VCC) and that they drop to ...
4
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5answers
2k views

Computer to Arduino Interface Options

I need to send 800 bytes of data from a computer to an arduino board every 20ms (approximately). I began with the serial library which works nicely but it is too slow even at its highest rate (115200 ...
3
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2answers
14k views

Philips/Magnavox LCD TV Service UART / ComPair

I have a Magnavox 42MF438B/27 42" LCD TV. The IR sensor (or something related) quit working after awhile, so we have been unable to use the remote. Today, I was digging around behind the TV and ...
5
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3answers
7k views

XBee dropping packets and actual data rate lower than expected

I am transmitting continuously at 9600 bps using the default configurations for both my XBees XB24-B. The communication is one way only, the transmitter is connected to the ATMega328 UART and the ...
3
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3answers
646 views

Doubts on Implementing a Simple Protocol for XBee Comms

A system that I'm developing will use XBee modules for a point to point connection between a micro-controller and a PC. Data will only be sent only in one direction -Micro to PC and at 10-20fps. The ...
4
votes
2answers
716 views

How to interface a Blackberry Torch with a serial device?

I have a Blackberry Torch that needs to send 10 bytes per second to a serial device. The serial device will probably be a basic stamp 2 or other microcontroller. The Blackberry does not need to ...
4
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2answers
1k views

Problems with CDC Device Class

I'm using the Microchip 16-bit 28-pin starter board and the USB communication with the PC keeps breaking. There are two microprocessors on the board. The application processor communicates to the USB ...
3
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2answers
6k views

Set RS232 port options from MacOS X CLI

Does anybody know the magic command to set baud rate, parity, flow control, etc. for an RS-232 port on the MacOS X CLI?
2
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1answer
331 views

Requirement for a high-speed (10 Mbit/s) PCI-bus synchronous serial port

What high-speed PCI-bus SSP can be recommened, capable of 10 Mbit/s supplied with suitable drivers to interface to a .NET application? Data is sent via RS-422 type drivers with differential ...
39
votes
8answers
37k views

How to resolve I2C address clashes?

I want to connect multiple I2C slave devices to a micro controller all on the same set of pins but the I2C devices all share the same address. The addresses are fixed in the hardware. Is there any ...
2
votes
1answer
867 views

Connect to Arduino Mega serial interface by C code

I'm having trouble talking to an Arduino Mega using serial port commands on Windows. Identical code works fine to connect to an Arduino Duemilanove but doesn't allow connection to the serial port with ...
14
votes
2answers
10k views

Serial newbie: why can't I just hook the wires up?

I'm trying to transmit from an ATtiny85 to a PC using Arduino-esque code over a USB-Serial converter without understanding very much of anything. I was shocked and appalled that it did not work. I ...
4
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5answers
5k views

USART transmit problems on a PIC

I'm trying to send data to an SD card from a PIC18f4580, but the PIC is not sending what it should be. related global variables: ...
1
vote
1answer
198 views

how to find NTE part numbers

Can you please tell me how to find part number of the particular chip. I was trying to find max232 chip locally, and I have been told that I need to provide NTE part number. I searched google, but ...
6
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2answers
1k views

Serial EEPROM with FAT

Is it possible to format an SPI EEPROM (such as AT24C128) to be used as an SD card? So format it with FAT 32 and have a 16MB drive appear in windows? Thanks
11
votes
3answers
13k views

Can the Arduino be used to “spy” on a UART connection between two devices?

I have a need to install an Arduino (actually just the IC) into existing hardware to enhance functionality. What I would like to do is connect the Arduino so that it "spys" on the I/O lines between ...
5
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5answers
5k views

Anything special I need to know about RS232 & FT232R?

I'm trying to interface an XSens IMU with my computer, and I'm running into interesting difficulties. The IMU has an RS232 connector that just uses the pins VCC, GND, TX, RX, nothing else. The SDK ...
3
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1answer
151 views

Need to purchase a Serial port that can be soldered to a motherboard [closed]

All I can find are adapters and gender changers. Where can I find one with actual leads I can solder?
2
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2answers
351 views

Serial nested if statements (Not working)

I have been trying to get this to work for a few days. What i have at the moment is TouchOSC installed on my Iphone sending commands to a processing program, which in turn simplify's them and sends ...
8
votes
5answers
868 views

What is the most popular embedded serial bus? [closed]

I'm designing an embedded device that I would like to make interoperable with third party peripherals through a serial bus. Should I choose SPI, I²C, or some other bus? The peripherals will be ...
2
votes
1answer
1k views

RFID Reader UART

Was wondering if someone could give me a hand with a project that I am undertaking. I have searched forums high and low and am yet to find the information to solve my problems. Basically I have an ...
22
votes
12answers
8k views

Best serial monitor?

I just recently started using a Sparkfun serial LCD. I am able to control it through an arduino, but I want to be able to control it through a terminal on my computer. To be able to move the cursor or ...
6
votes
7answers
1k views

Should I consider using RS-485 for my next project

I am planning on an automation project that will be using several different sensors including but not limited to: Temperature, Barometric Pressure, Air flow, Humidity, etc. As I was talking with ...
9
votes
5answers
2k views

RS232-to-USB Converter [closed]

Anyone have any recommendations on a good rs232-to-usb converter. There are a lot out there and from the looks of it some are hit or miss. Good driver support is a must.
7
votes
3answers
4k views

Apple Desktop Bus (ADB) to USB Adapter

I have an old Apple keyboard that I would like to use but it uses the ADB bus instead of the newer USB bus. Griffin used to produce a product called the iMate which was an ADB-to-USB converter but ...
4
votes
3answers
876 views

3pi Robot with Bluetooth

I want to use bluetooth to grab the info off my 3pi rather then have it display on the small LCD. Pololu provides a lib for serial communication. I'm wondering what the best bluetooth/serial module ...
11
votes
2answers
2k views

Unit testing AVR assembly language

How do you unit test your assembly code? I'm working on a serial servo controller as part of a hexapod robot project and the code has got to the point where it's becoming complicated ;) Anyway, I'm ...
13
votes
4answers
6k views

How to reverse engineer I2C and SPI protocols?

If I have an unkown device which talk I2C or SPI how can I reverse engineer the protocol. Basically I am looking for something similar as snoop or tcpdump. For software Mac is preferred but can also ...
5
votes
7answers
6k views

iPhone hardware serial port access

Does anyone know how to access the iPhone's serial port, from a program on the iPod to allow that application to send signals. The idea is that the iPod could be used as the brain for some kind of ...
6
votes
6answers
1k views

Serial Enabled LCD

What sort of LCD should should i be using to go with my Arduino? I have used the HD44780-compatible LCD in the past, but heard that the Serial Enabled LCDs make life a lot easier.
18
votes
9answers
12k views

Ideal WiFi to Serial (or SPI) bridge?

What are some recommendations on an ideal WiFi to Serial bridge? My ideal qualities would be: Simple connectivity, SPI or Serial Reasonable fast speed, at least 1mbit/sec ideally (though probably ...
8
votes
1answer
4k views

Upload to an Arduino from the command line

If I have a sketch compiled to hex, is it be possible to upload this sketch to an Arduino board using avrdude directly from command line? Pekkaa figured out that arduino ide executes the following ...