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.

learn more… | top users | synonyms

1
vote
2answers
28 views

Interfacing RFID reader module with PC

Sorry it may seem stupid but I think my confusion is drifting me away from the solution so I wanted to ask. I am trying to build a fixed RFID reader. But the project has some other complex work to be ...
0
votes
0answers
18 views

How to interface si8902 with atmega128rfa1?

The atmega128rfa1 works as master and si8902 works as slave that is okay. But when a request is given Si8902 takes 8us to reply back with the ADC data. How can master wait for 8 us. How to synchronize ...
0
votes
0answers
39 views

Best and Simplest component for switching

I have a SIM 928 that has 4 pins for serial rx/tx. One set is for GSM and the other is GPS. On raspberry pi or micro controller, I only have one set. What is the best component to use to switch from ...
0
votes
1answer
112 views

Wrong signal on MISO line

I am trying to setup communication between my MCU and slave chip but here are the results from logic analyzer: I have basic knowledge of SPI protocol but as far as I know, data should be sampled at ...
0
votes
1answer
36 views

Connecting an auxiliary cable into three out of 9 serial pins

Please bear with me as I have no electrical engineering knowledge at all. I have a device with the following connection (and connecting cable): which as far as I understand is called an SRT ...
0
votes
3answers
62 views

Electronically, how to control this 5v arduino-style relay board from a PC serial port

I have the following relay board (pictured below), and to activate any of the relays, you simply connect one of the IN1-IN8 pins to ground. Easy. The current going between gnd and INx is negligible, ...
3
votes
2answers
43 views

Parallel input to serial output

I have been learning a bit about electronics. In particular I have been playing with the shift register 74HC595. Here I understand how bits are moved into the register serially, that is one bit at the ...
0
votes
1answer
32 views

FIFO ASF drivers and USART avr problem sending and recieve data via rs232 connection

I'm working to send frame of 8 bytes to Micro-controller Xmega128a1 (via RS485). The frame looks like this: {header1,header2,CMD,D1,D2,D3,D4,CRC} For example: ...
0
votes
2answers
42 views

Is an ADC with a serial interface slower than a parallel one, both having same sampling rates?

I am trying to interface an adc with an fpga, but I am running out of pins. I wanted to know if I use an ADC with a sampling rate same as the parallel one but with a serial interface , will I be ...
1
vote
1answer
54 views

Vacuum Fluorescent Display (VFD) serial connection ~ Debugging Questions

I am attempting to display information on a Futaba Vacuum Fluorescent Display (VFD) (apologies for the google-drive link to the datasheet. I lost the original and couldn't find it again). I'm ...
1
vote
1answer
84 views

Reverse-engineering asynchronous serial protocol for EcoSmart Tankless Water Heater

I am trying to reverse-engineer the remote control protocol for my EcoSmart Tankless Water Heater. Unfortunately, the remote control device is no longer available for purchase, and the manufacturer ...
0
votes
2answers
76 views

Will RS 485 to RS 232 converter change the half duplex mode to full duplex mode?

I am using an RS 485 serial connection through which I need to send S19 files for my boot loader project. Since it is a half duplex mode of connection, I need to toggle a dedicated pin before sending ...
0
votes
2answers
56 views

Can Putty be used to send serial data from the PC to the PIC? How?

I am looking for a simple program that can send data down the serial to the PIC. I have used Putty with USB-UART converter on my laptop. I have made the PIC->PC communiation work which is frankly a ...
0
votes
2answers
58 views

Can we send a file through Half Duplex connection?

I am working on a boot loader design for a kinetis controller. I am using this Terminal application ( https://sites.google.com/site/terminalbpp/ ) . I am able to send texts like, " Hello world" ...
-1
votes
0answers
12 views

What kind of ports are on this PCB? (Kangaroo Pocket PC) [migrated]

| Overview Please refer to the teardown of the Kangaroo mini PC (below.) I am interested in finding out as much as I can about this board and the ports associated with it. Any details/specifications ...
6
votes
2answers
169 views

Is anything besides rx and tx actually used in rs232 nowadays?

Whenever I come across a PIC or even a FPGA project that is communicating over the serial port with a PC; only Rx, Tx and power are connected on the 9 pin connector and the other pins/signals are ...
0
votes
0answers
25 views

Arduino Serial Monitor works but not on PySerial and PuTTY [migrated]

I made simple custom arduino board using an atmega328p and the PL2303 serial to USB chip. In my arduino program, I am in a loop that sends out a string continuously. I can read this in the Arduino ...
0
votes
0answers
16 views

Creating a terminal windows on PC to control Nios-II in FPGA to send commands to SPI slave

To ease testing of slave devices e.g memory devices, ADCs e.t.c is it possible to create an application where one has a terminal window open on PC from which one can write specific 8 or 16 bit words ...
0
votes
0answers
6 views

Alternatives to the V35 interface [migrated]

I am trying to find an alternative for the legacy cables I am using. I currently have a Cisco router connected to a DL 600 E (Multiplexer). On the Cisco router there is a serial port. On the ...
0
votes
2answers
96 views

Confused about how microcontroller board and computer communicate

i recently got myself FRDM K64F board and got myself occupied with the following questions : Does the compiled hex code i send to my board has to go to the uart chip prior going into ...
0
votes
4answers
145 views

No communication with SIM900A using Arduino Uno

I am using Arduino Uno and trying to connect to a SIM900A GSM module using serial communication. I am not receiving anything from the module at all. The module powers on and has another LED flashing ...
0
votes
1answer
40 views

Raspberry Pi 2 to arduino RF Serial link with USB to Serial TTL Converter

This is my first question here. I want to have a communication channel which will use a 433 MHz RF TX-RX pair. I want to use a Raspberry Pi 2 as a transmitter and an Arduino Mega as a receiver. Is it ...
0
votes
1answer
45 views

If current consumption of serial flash SST26VF064B is 15mAq104MHZ then at 50MHZ it is 7.5?

I am Mohan working in Germany. For my data logger project i choose SST26VF064B serial flash. My data logger should consume lowest power possible. I see that SST26VF064B is consuming 15mA@104MHZ. In my ...
0
votes
1answer
31 views

Using Energia, how do I get around disableWatchDog() locking up my program?

Below is a short code chunk. The code locks up on the 'Serial.Begin(9600);' line. Can anybody tell me why? Also, can you tell me how to get around it? ...
1
vote
1answer
49 views

Large range input single level shifter

I have an application where I will be taking serial signals will need to level shift the signal to 3.3V. The input signal will be from 15 to 5V for a high input and I need them all shifted down to ...
1
vote
3answers
356 views

Uart Full Duplex vs Half Duplex

When uC1 wants to talk to uC2 via uart, the Tx of uC1 is connected to Rx of uC2 and vice versa. Half Duplex states that only 1 uC can use the communication line at a time and Full Duplex states that ...
0
votes
4answers
126 views

reverse engineering a serial protocol with a scope

In lieu of a serial capture device are we able to look at the output of an rs-232 feed and correlate what we see on the scope with ASCII/hex representations (do certain voltages tend to correspond ...
1
vote
1answer
52 views

Does Interrupting a Microcontroller Data Receive with a Higher Priority Interrupt Cause Data Loss?

I would like to know what would happen if a Serial Terminal were to send a large amount of data to a PIC/AVR, for example over USART interrupt, which was then interrupted by a higher priority ...
0
votes
2answers
33 views

clock frequency confusion

I am using an atmega16 micro controller with a 12MHz external crystal oscillator. But I came to know that the internal clock frequency is 1MHz I need to calculate UBRR value for serial communication. ...
0
votes
0answers
97 views

ESP8266 sends garbage data always on reset

I am assigned to do a project on IOT using the ESP8266 wi-fi module. For refashing the firmware I also bought a USB-TTL converter and installed the necessary drivers on my PC I connected the RX and ...
0
votes
1answer
63 views

10Mbs USB to serial communication

I want to transfer data from a full duplex serial device (TTL) to the PC. The data rate is 10Mbs , i am investigating potential solution. I can add a level converter like max232. I have 2 questions: ...
0
votes
1answer
42 views

High 4bit crash in atmega128 serial communication

I am trying to communication between atmega128 and serialCom(PC), but I get a pretty strange bug. When I send data 0 to 255 (char) from atmega128 to serialCom(PC) ,after sending 0x08, the high bit ...
0
votes
0answers
34 views

Pair two RN52 Bluetooth audio modules using single button

I'm doing a project that I wanted to connect two users through RN52 Bluetooth audio modules. both of users have mic and headset for the communication. I decided to user HSP Bluetooth profile for this. ...
4
votes
1answer
52 views

Help with multiple receiver channels and single storage architecture

I want to build a datalogger that has multiple receiver channels that run on serial communication protocol RS232 and then collect the information from the channels in a single storage that would be ...
0
votes
2answers
153 views

STM32F7 Discovery USB CDC using CubeMX [closed]

I've created a project in CubeMX for my F7 Discovery. I followed instructions form here. However, in my Device Manager on Windows nothing appears. When I used precompiled code from link I was assured ...
4
votes
2answers
548 views

UART synchronization [duplicate]

I am trying to understand UART synchronization. In a UART, the default state is high, and it starts the reception process when it receives a start bit (high-to-low transition) In some scenarios any ...
0
votes
1answer
113 views

UART only returns the same character

I am trying to create a program that contains UART using the PIC18f25j50 device. I have attached my creation so far which is a simple program that outputs a single character repeatedly to the console ...
0
votes
0answers
36 views

PC Cannot Access HC-06 Bluetooth COM Port

I have an HC-06 Bluetooth module connected to an Arduino UNO board to allow for the data received by the Ultrasonic sensor to be transferred to my PC via bluetooth and serial communication. I am using ...
-1
votes
1answer
62 views

SFP vs LAN port [closed]

From a board design standpoint, What are the categories to consider when picking between an SFP and LAN port. This is to be used as a 1GE management data path so regarding data rates both options ...
0
votes
1answer
78 views

When do I need a resistor during LED flashing? [duplicate]

My goal is to flash a few white LED in serial using 9V battery. Here are the specifications of this LED. As I saw the Forward Voltage is 3.4V, but what does it really mean? Can't I plug this LED ...
0
votes
1answer
63 views

xmega serial communication using MAX3232

Hi I am trying to talk to send a character to the PC using the xmega128a1 and the MAX3232 USART to Serial converter chip. Here is my setup and "send char" function below: ...
0
votes
0answers
50 views

Connection between a USB to TTL module and a TTL to RS485 module

I have been provided with these two modules: CP2102 USB 2.0 to TTL UART Module 6Pin Serial Converter STC Replace FT232 Module sunkee MAX485 module / RS-485 module / TTL to RS-485 module How can I ...
0
votes
0answers
68 views

Xbee S1 transparent mode communication problem

Good morning all, I have recently bought two xbee series 1 modules as a way to learn the module, since I haven't used them before. Anyway, I got one USB connector (USB-TTL converter) and am connecting ...
1
vote
1answer
85 views

Windows 10 updates drivers for FTDI

I have one question about the following products: foca-v2-2-ft232rl-tiny-breakout-usb-to-serial-uart sparkfun-ftdi-basic-breakout-3-3v I bought them last year and after time without using them I ...
4
votes
1answer
186 views

How do I choose an optocoupler for (19200 baud) serial communication between Arduino and RS422 transceiver?

I wish to read data from a Fronius solar inverter via the Fronius RS-422 Com Card option (part# 4,240,001). 1000 meter cabling length The Fronius communication uses a 5-wire RS 422 interface (`RX-`, ...
0
votes
1answer
110 views

Calibrating Servo Motor

I am working on a project on image tracking on MATLAB, by moving the mounted camera on a servo motor controlled by the Arduino Uno board, the data is serially sent to the arduino using USB according ...
3
votes
1answer
57 views

Switching Serial Connections among several devices?

I have 3 devices that communicate via a serial port. Let's call them Device 1, Device 2, and Bluetooth (BT to serial adapter). The BT is used to communicate with a computer, but it can be treated just ...
1
vote
1answer
96 views

Chaining Multiple USB Hub Controllers for Serial Interfacing

I have a need for a large amount of serial I/O from a desktop computer in a robotics application. I considered using all off the shelf parts with a large set of USB hubs and usb to serial adapters, ...
1
vote
1answer
44 views

interfacing external push button to msp430 using energia

I am writing code in Energia using the mso430g2553 launchpad and an external pushbutton with a pullup resistor. The code should simply display the state of the button on the serial monitor, 1 for ...
1
vote
2answers
99 views

Serial Communication Rx ISR logic design

If im not wrong, an ISR is supposed to do minimal processing when it receives a data serially(via UART). Im planning on implementing such a protocol for communication between 2 systems via uart. This ...