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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11 views

XBee Packet Buffer

I have an Xbee Pro Series 2. One is set as the coordinator and one as an end device. If I manually send a packet containing a one byte payload from the coordinator to the end device, I get an ...
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0answers
22 views

Serial AT commands with Bluetooth CSR8645 module

I bought a Csr8645 (bleutooth audio module). The module connect to my phone out of the box... It should support some AT commands. So I have tried some but I don't get anything in response. The only I ...
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0answers
14 views

XBee Pro 900 RPSMA not detecting

I bought 2 XBee Pro 900 RPSMA from Sparkfun.One of them is detected by XCTU but same other one is not detected by XCTU. so I tried recover faultly one by seeing this video ...
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0answers
17 views

Why are RI and DSR signal combined in TIA-561 (RS-232 over RJ-45)?

EIA/TIA-561 is the standard for transmitting RS-232 signals over an RJ-45 modular jack instead of the more familiar DB9 connector. I'm getting most of my information from here: Zytrax They have this ...
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2answers
70 views

Is it possible to send AT commands through TCP?

I have a SIM900 GSM/GPRS device, I can send AT commands through HyperTerminal and everything is fine. I can configure GPRS connection through AT commands: ...
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1answer
109 views

How serial resistors actually reduce EMI?

I am recently working with a GSM based system, and there was this advice in the datasheet of the GSM module: 22Ω resistors should be connected in series between the module and the SIM card so as ...
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1answer
39 views

Connect kindle 3 serial port to epson printer's 8 pin mini-din serial port?

I have a kindle 3 with a broken screen and an old EPSON stylus 1520. The kindle has a serial port with TX, RX, GND and 1.8v VCC (source). The printer has a mac compatible 8 pin Mini-DIN port. Would ...
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0answers
33 views

Can the Arduino Due be used as a serial to USB converter? [migrated]

The Arduino due exclusively runs on 3.3V, so I am wondering if this can be used as a USB to serial converter just like the Arduino Uno could, or do you need to do level shifting?? Will I ruin the ...
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0answers
26 views

Programming FT232RL with ft_prog

I recently bought an FT232RL module and am trying to use it in one of my projects. I want to change the USB descriptors to be my company and description, but FT_prog is not working. It discovers the ...
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5answers
217 views

Low cost simple communication between two microcontrollers

What tradeoffs and connection options are there in low cost bidirectional communication between just two microcontrollers? In this case: Master/Slave relationship, bidirectional data flow Distance ...
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1answer
52 views

Can I use serial communication for audio amplifier remote turn on?

I have a cheap Chinese tablet/GPS/dash-cam in my car. The problem is that I can't hear driving instructions on GPS as the volume is too low. I don't want any external wires for additional speakers and ...
0
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1answer
52 views

Alternative to AM and FM transmitting for data transmission?

So, I need to communicate wirelessly between a micro-controller and my computer. I'm building a radio receiver circuit, and a radio transmitter circuit that works on FM transmission. However, I had an ...
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1answer
42 views

Serial Counter in digital electronics [closed]

What exactly is a serial counter in digital electronics? Someone told me it is a way of to design a counter with shift registers and some combinational circuit to obtain s counter that operates ...
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3answers
56 views

How to send string in serial communication in AVR-C

So as the title states, instead of sending a byte of information at a time, I would like to be able to send a whole string. What I tried to do was that I tried to put the user input in an array and ...
0
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1answer
70 views

One wire (+GND) serial communication. How to have a correct coupling?

I'm a firmware developer more than a hardware designer. I've a doubt about an idea of mine. I want to obtain serial communication between eight ATtiny85 (slaves) and an ATmega168 (master - It might ...
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1answer
47 views

UART: two transmitters, single slave

simulate this circuit – Schematic created using CircuitLab My circuit is shown above - where I have the TXD pin of an ATMEGA connected to the RXD pin of a BT slave. Both devices operate ...
2
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2answers
102 views

Serial data received in wrong bits

I have an RS422 interface set up between an Arduino and a custom-built device. The device is set to transmit a 16-bit header, followed by 66 bytes of data, at a baudrate of 460,800 and at 200Hz. This ...
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1answer
31 views

Atmega328P FTDI 5V USB Serial Communication

I am working a Atmega328P and FTDI 5V USB Cable to get a Serial Communication between the Micro-controller and the PC. I am using Tera Term for receiving out from Micro-controller. I am using an ...
0
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1answer
55 views

How to connect 3-wire spi with an arduino to the Maxim DS1801 digital resistor?

I just picked up an Arduino Due with the SAM3x 3.3v chip. I am attempting to communicate with a Digital potentiometer to control an amplifier's volume level but I have no clue how to go about hooking ...
4
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1answer
97 views

MIDI IN : many circuits

I'm building a MIDI IN to serial port RX cicruit (for Raspberry Pi, or Arduino, or anything else...) using a 6N138 optoisolator. But I find many different circuits, I don't know why there are so ...
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1answer
117 views

Additional TX and RX pins for FT232RL Microcontroller Interface

I'm designing a board that needs to be programmable via USB and external TX/RX pins. I decided to use FT232RL ( http://www.sparkfun.com/datasheets/DevTools/Arduino/FTDI%20Basic-v21-5V.pdf ) for the ...
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1answer
33 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 ...
0
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1answer
38 views

Simulate modems and leased line over ethernet

I am using a leased line with two modems on the edges. Those modems receive x.21 protocol from db25 connector on their back and transmit to each other over the leased line. For some pairs of leased ...
0
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0answers
54 views

How to read inverted serial using Teensy LC?

I'm trying to read inverted serial data coming in from FrSky DJT module. I managed to read it using SoftSerial on another Arduino board and FTDI USB dongle (after configuring it co accept inverted ...
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1answer
46 views

can't get PORTB value in pic18f2550

I'm trying to send The PORTB to the serial port and receiving the data on pickit2 UART mode.. ...
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3answers
72 views

Convert MP3 recording of data casette to serial data

I have a retro EMCO F1P CNC machine with a matching M1 controller that comes with mini data cassettes containing the "Machine State Data" which must be fed into registers of the controller before ...
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0answers
77 views

Design serial adder for 16 bit register using on full FA

I wrote a serial bit adder for a 15 bit width shift register and a full adder (positive edge trigger, asynchronous reset) I don't know where the error in this code is. This is the code: ...
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2answers
137 views

avrdude: ser_open(): can't open device “/dev/ttyUSB0/”: Not a directory

Recently I have been trying to learn how to program Arduino in Code::Blocks. I used the AVR project wizard to create my project. The program compiles flawlessly into a .hex file that I want to upload ...
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1answer
33 views

serial data from avr to python

I am using ATtiny2313 microcontroller along with a RS232 to establish communication between my microcontroller and the laptop. Here's my question : What is the predefined system for the laptop to ...
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2answers
150 views

Can I an RS422 interface to Arduino's serial pins?

I have a custom-designed circuit that communicates to and from the external world through an RS422 interface. I wish to communicate with it with an Arduino, preferably UNO. The RS422, much like the ...
0
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1answer
58 views

Arduino Serial Error Correction

I currently have a setup where I take serial output from Arduino 1 and push it through a transmitter to the receiver of Arduino 2 where it is fed back into the serial input and further processed. I ...
0
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0answers
19 views

Zigduino Serial Communication works when programmed from Ubuntu but not Mac

So I have a zigduino which I am programming with TinyOS. I have tried programming TinyOS locally on Mac (10.10 Yosemite) and Ubuntu (14.10). It makes and programs fine using the command (on Mac): ...
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1answer
60 views

Having trouble synchronizing serial data from FPGA to python script

I have a Spartan 6 that's collecting some data I need to send over serial to a python script where it can be displayed on my PC. This is actually the first time I've ever dug into serial ...
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0answers
173 views

Pic to Pic Communication with 434mhz wireless module?

I want to transmit Data From one Pic18f2550 to Another using a cheap 434mhz wireless module. but its not working at all. Following are the circuits for Tx and Rx respectively. the code for Tx ...
1
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1answer
53 views

Can i charge 2 li-ion 12v bateries in Series?

i am making an external batteries arrangement for my laptop. in this i am using two li-ion 12V batteries. now i am facing problem to charge this batteries in series or in parallel? i have tried to ...
1
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1answer
68 views

How to Reduce Serial Noise from a Refrigerator

I am controlling the compressor of a compact refrigerator using an Arduino Mega and an opto-isolated relay block. The Arduino is connected to the PC using a serial over USB (Atmel version). Since the ...
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0answers
26 views

Turn on/off serial and I2C display [duplicate]

I have 2 character display, one is controlled by serial another is controlled by I2C. I could control both with serial or I2C alone. But that's not the point. Now what I want is, to completely turn ...
0
votes
1answer
51 views

ADS1278 double values

I am recently using a ADS1278 as the ADC of my system. The configuration is Frame-sync, TDM, Fixed for the 8 channels. The mode is high speed (sampling at 64KSPS). The core clock and the serial clock ...
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0answers
48 views

GSM SIM900A Board and USBtoSerial

just got my SIM900A board same as Connecting GSM SIM900A module with Ardunio and I am trying to connect it to my USB-rs232 converter. I couldn't find any doc on module itself, has anyone done it? Tnx ...
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2answers
57 views

PIC18f45J50 2nd Serial port?

I am working on a GPS tracker Project where i need to interface with a GPS module and a UMTS module for 3g connectivity. with this i need 2 serial ports on a single microcontroller. For this ...
0
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0answers
14 views

Xbee Serial communication with RaspberryPi

I want to know how Xbee serial communication actually works. Normally we uses python libraries to communicate with Xbee in RaspberryPi. But I have to implement the serial communication in Lua ...
0
votes
1answer
102 views

Xbee Serial communication with RaspberryPi - In Lua [on hold]

We are working with Mihini for an IoT project. Here we have to communicate via Xbee with sensor nodes and coordinator(RaspberryPi) . Mihini doesn't seem to have any modules particular for Xbee ...
1
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0answers
121 views

How do I connect a photodiode to a GPIO?

I'm trying to read serial data emitted through an IR led with a Raspberry Pi using an IR photodiode, but I'm not sure about the correct way to hook it up. Unfortunately I don't have a part number for ...
1
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1answer
124 views

AVR USB to Serial Converter; Quick Question

I have a TI86 calculator that I've had for over 7 years now. Well I'm letting a lady friend on mine borrow it, and I was going to load it up with some apps for her. And the tradeoff is happening this ...
0
votes
0answers
199 views

DIY JDM pic programmer voltages

I have a ftdi usb->ttl chip and some resistors lying around and want to program some pics without spending loads on a programmer. As far as I can tell the only pin here that needs to be shifted to 12V ...
0
votes
1answer
31 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 ...
0
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0answers
397 views

Real-time Matlab Simulink plot from serial port data

I have an arduino that constantly writes data via serial port on a usb that I want to plot in real time using Simulink (Matlab R2013b). I have seen matlab codes (.m files) that are working but what I ...
0
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1answer
110 views

real time online push button based counting system

I am doing this project: I have 4 inputs. These are push buttons, connected to a microcontroller. Each time a push button is pressed, say for example pushbutton_1 is pressed, the press of a switch ...
0
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3answers
197 views

Correctly using RE and DE with RS485

I'm trying to build a RS-485 project using MAX485's. However, I'm having trouble finding out how to correctly use the RE and DE pins. Some PDF's and websites say that RE and DE should be tied together ...
0
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2answers
100 views

Is it possible to convert SPI to UART without a microcontroller?

I was wondering about converting SPI to UART only in that direction, not the other way around, without using any microcontroller or bridge. If synchronous can be seen as a particular case of ...