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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9 views

Teensy + Matlab Serial Communication Problem

Im trying to send some data from my teensy to matlab but matlab didnt even call the callback function: This is my matlab Funcion: ...
0
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2answers
61 views

Logic low not low enough

I'm having an issue where the "low" level being output from one device isn't low enough for the device on the other end to interpret it as such. I'm guessing I'm not the first person to have this ...
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0answers
45 views

AND gate mysteriously and ludicrously slow

I've made a 3 input AND gate from 4 NANDs in order to daisy-chain 3 motor drivers jrk 21v3 and get the current value out of them. The problem is, the command is sent OK, the driver responds OK with ...
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0answers
25 views

MCP2200 - which GPIOs for DTR, DCD, DSR and RI?

Due to the recent controversy surrounding FTDI, I'm looking for a replacement for future designs. I'm looking very hard at the MCP2200. The only thing I can't figure out is that they have several GPIO ...
2
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2answers
90 views

Very long transmission-line design tips

I'm designing a very long transmission line between a master node a some slaves far away connected by a bus where only 3 wires are used: - A DC power supply (24vdc) - B Digital comm - C Ground As ...
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0answers
27 views

STM VCP Driver .inf file

Where can I get the STM32 Virtual Com Port (VCP) Driver .inf file? I want to configure the driver to change the Latency Timer and Receive/Transmit buffer size, but I cant find it. I also cannot ...
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0answers
34 views

How can I make the Raspberry Pi and BeagleBone Black talk via serial?

The BeagleBone Black is great. You plug in the USB cable to your computer and a DHCP connection is established, allowing you to ssh to the BeagleBone in seconds. Unfortunately the Raspberry Pi takes ...
0
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2answers
73 views

PC serial communication with FPGA

I am designing a simple 16 bit adder circuit in Digilent's Xilinx Spartan 6 FPGA. The Verilog design accepts two 16 bit inputs A and B and returns the 16 bit sum C = A+B. I am ignoring carry in and ...
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2answers
59 views

FTDI cables confusion

I went to the store and asked for a FTDI cable however, I need a bit of assistance, apparently I didn't properly do my homework before shopping and I ended up with upper pic. I need an FTDI cable to ...
-1
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0answers
24 views

What does the line “while (! Serial);” do in an Arduino program? [migrated]

I'm new to Arduino, and I am trying a couple of tutorials. What does this line do in a program? while (! Serial);
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1answer
61 views

Strange problem with JY-MCU (HC-06) Bluetooth module

Short explanation: data sent over the bluetooth serial does not arrive correctly to the Arduino. Yesterday I connected a JY-MCU bluetooth module to my Arduino UNO R3 to test it. I connected the TXD ...
0
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0answers
27 views

Using nRF8001 as a master with an FPGA

I would like to use Nordic's nRF8001 modules in Master and Slave modes and also would like to connect it with Spartan-3E FPGAs using SPI. I am considering buying the nRF8001 DevKit. I believe it is ...
5
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1answer
361 views

Transceivers in the field of FPGAs: When and why will we use them?

I am recently getting myself into the field of FPGA design and development, and lately I've found myself hearing a lot about transceivers. I tried searching the net for some answers about these ...
0
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0answers
17 views

Send Processing color data into Arduino [migrated]

I am trying to send color() data from Processing to Arduino. Here is my code from Processing: ...
0
votes
1answer
74 views

adding fluctuations to 5V

hobbyist here, hope someone can guide me. I'm using I2C (only have 4 wires{PWR, GND, SDA, SCL}) to communicate with two exterior Circuit (Circuit A, and Circuit B, both have MCUs), which can be ...
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0answers
10 views

RPI ERROR: Unable to open NFC device [migrated]

I am currently following this guide: https://learn.adafruit.com/adafruit-nfc-rfid-on-raspberry-pi/testing-it-out After completing all the steps - inputting into the console: $ cd examples/ $ sudo ...
3
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0answers
66 views

DMX512 packet issue (no break?)

I'm not sure if I'm reading this wrong or something, but this is a trace of the DMX packet that's coming from my USB-RS485 module then being converter to UART logic levels for my microcontroller. ...
0
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1answer
52 views

USB Serial Communication for STM32F401C-Discovery using Keil uVision5

I have developed a STM32f401c-disco board using Keil, and next I would want to be able to send data out (say just a "hello" string) via the serial link USB-ed back to my PC and show it (I have ...
0
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1answer
72 views

What are all of the pins of the Beaglebone Black Rev. C serial (debug) header?

The Beaglebone Black Rev. C has a serial debug header with 6 pins. I would like to know what each of these pins is. If numbered 1-6 starting closer to the 5v barrel connector, pin 1 is ground, pin 4 ...
4
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1answer
155 views

Reverse Engineer Serial Signal

This is a long post as I want to take you through all the work I've done. The TL;DR version is I've got an unknown controller for a mechanical heat pump and I'm trying to reverse engineer the signal ...
0
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0answers
57 views

Finding out RS232 commands from massage chair

Hey all I have a very quick question to ask about the Bus Pirate before I go ahead and order or not order it. I am looking to get the RS232 commands from a massage chair. It has an ugly, bulky "box" ...
3
votes
2answers
157 views

Reverse engineering old serial devices and cloning with Arduino

I have a piece of music equipment that uses a remote control. This remote control communicates bi-directionally with the main unit. It communicates over RS-422 protocol (mainly for the cable distance, ...
0
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1answer
55 views

How to get 32u4 arduino to ignore DTR for USB Serial?

32u4 based "USB Serial Ports" refuse to send data to the PC unless DTR on the PC software side is set to high. If the PC software does not set DTR to true (high?), then Serial.print() on Arduino goes ...
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3answers
127 views

Maximum cable length for 5V or 3.3V I2C, UART, or 1-wire signals over Ethernet and how to increase it?

I know similar questions have been asked before (Maximum cable length for 3.3V UART signals) but I would like to know the answer more specifically for a hobbyist. I've been experimenting connecting ...
1
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1answer
77 views

Possible to charge a LiPo battery with a 3.5mm headphone cable but also send/receive data?

If I have a device (Device A) that is plugged into a 120v wall outlet, and is connected to another device (Device B), that has a small LiPo battery, via a 3.5mm headphone cable (consider this a ...
1
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1answer
42 views

What should I do to have both the synchronous and asynchronous serial communications?

You know that ATmega32 supports Universal Asynchronous Receiver/Transmitter. with pins : RXD & TXD But it doesn't support Universal synchronous Receiver/Transmitter. with pins : RXD/TXD & ...
0
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1answer
60 views

Writing data over Serial comm //Arduino & MPU6050 gyro+accelerometer

I'm new to serial communication and I am just scratching the surface, therefore please bare with me. What I need to accomplish is the transfer of the gyroscope data I gather on my Arduino to ...
2
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0answers
104 views

Understanding timing constraints

I don't want an introductory text on timing constraints, nor an application note, an user manual, a webinar. I read them all, already, many times. The concept behind timing constraints is very easy. ...
0
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2answers
81 views

Convert FTDI USB signal back to serial

I have a data logger with a USB output (FTDI FT232RL) and I'm trying to get the information remotely using a XBee modem, but my problem is that I need to "convert" the USB signal back to serial to ...
3
votes
3answers
105 views

Selecting digital componentry in bulk [closed]

There are a ton of electronics retailers and suppliers on the internet, all selling components at (essentially) retail prices. But when big companies need to use digital components (batteries, ...
0
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0answers
35 views

smartcard and smartcard reader data transmission

I have a bunch of smartcards. I going to build a sniffer device that communicate with COM port to do MITM attack just for fun and for testing and upgrading my knowledge in this field. I appreciate if ...
0
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2answers
110 views

RS485 network failing on replacing SP485 chip with MAX485

I have created an RS485 communication network as shown below. {PC}->[FT232->RS485](120 ohm)<----twisted pair(2 wires)------>(120 ohm)[RS485 -> MSP430] Here PC acts as Master and sends the data ...
2
votes
1answer
102 views

STM32F10x SPI - No Clock

I'm trying to get basic SPI operation working on an STM32F107VC chip using the WaveShare Port107 development board. I'm trying to initialise SPI1 which resides on PA4-PA7. I'm attempting a simple ...
1
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1answer
89 views

What's the easiest way to get fast USB serial communications?

What's the easiest way to get fast USB serial communications from an Atmel SAM microcontroller? I consider fast to be faster than 1 Mb/s. In my previous projects I've used an FTDI module, but I've ...
0
votes
1answer
52 views

Board or product to drive 15 PWM/analog outputs from USB/serial connection

Ok, Let me explain: I would like to drive 15 analogs (0-12V) signal from my computer (based on user interactions/other not-so-cool stuff). This hardware has to be controlled over USB or Serial port ...
1
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1answer
129 views

How do I hook up an LED across the tx pin on my Atmega328?

I've built a standalone Arduino and upload sketches via this method From Arduino to a Microcontroller on a Breadboard. I would like to hook up an LED across TX like on the Arduino board, so I simply ...
1
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2answers
111 views

Identifying open switches in a serial circuit

I have an equipment that includes a circuit made of a bunch of NO switches arranged in serial. This circuit includes a LED that turns on when all the switches are closed. When one or more switches are ...
0
votes
1answer
70 views

Does BAFO “BF-810 USB to Serial Adapter (DB9)” supports full serial port?

Does BAFO BF-810 USB to Serial Adapter (DB9) support full serial port (hardware flow control) functionality? If not, how can I test full serial port functionality using serial port only with TX, RX?
0
votes
1answer
509 views

HC-06 Bluetooth module not responding to any AT commands

I am trying to interface with a HC-06 module but I can't talk to the module over serial. My VCC is connected to 5V (also tried 3.3V) of my Arduino Uno, and GND is connected to ground of it ...
0
votes
1answer
102 views

Serial Over IP or USB over IP?

Need to connect remotely to a device using cellular GPRS gateway. Device supports RS-232 and USB. It boils done to two options: 1.- Serial Over TCP/IP (Serial to Ethernet - to GPRS, or Serial to ...
0
votes
2answers
95 views

Pictures of different adapters, trying to understand how they work (PLC to PC communication)

I purchased the blue adapter in the picture as a USB/RS232 converter. It takes in the RJ12 cable from my PLC, and converts it to a USB input. Now when I try to use an RJ12-DB9 Female and then connect ...
0
votes
1answer
104 views

Can I transmit data over RJ12 to a PC from a PLC?

I have a Click PLC which has two RJ12 ports. I have successfully programmed it using C# and nModBus as a slave, but now I want to test the PLC as a master and the PC as a slave and noticed my laptop ...
1
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3answers
511 views

Why usb to serial port converter can’t program avr microcontroller?

With a serial port or parallel port in pc programming avr microcontroller is very easy and cheap. Problem is, no modern computer come with serial or parallel port. So, usb to serial converter should ...
0
votes
1answer
97 views

Is an USB-to-UART converter different from an USB-to-RS232 converter? [duplicate]

I have a USB-to-RS232 converter. The GND, TX and Rx pins of the RS232 I connect to GND, Rx and Tx on a development board I have. I've set the right baud rate, flow control and other settings in my ...
0
votes
1answer
68 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 ...
1
vote
1answer
97 views

C# & CCS File Transfer

I need to send/receive files from/to SerialPort and MSP430F5438A, by clicking a browse button in C# interface, selecting a file (like text, notepad, etc.), and in receive case, to save the file which ...
0
votes
2answers
102 views

I want to send data to seven segment display without micro-controller

I'm new to embedded systems I want to send data to seven segment display from my pc could i connect the seven segment display to my pc via serial or usb port or i have to use a micro-controller ...
3
votes
1answer
66 views

PIC datasheet is unclear on clearing framing error

On the PIC16F1829, FERR reflect the framing error status of the top byte in the two byte serial receive FIFO. Thus, assuming no new bytes arriving with framing ...
4
votes
2answers
257 views

Cascading several SPI devices

Is it possible to cascade several different ICs on the same data line, in order to use less CS pins, by tying the digital output of each to the digital input of the next? I am familiar with this ...
0
votes
1answer
59 views

L2 Bridge over Asynchronous Serial line [closed]

I am using pppd (in linux) to send ethernet data over a serial line to another computer. How can I preserve L2 headers while sending Ethernet frames over serial line? It seems the ppp protocol sends ...