is the process of sending data one bit at a time, sequentially, over a communication channel or computer bus.

learn more… | top users | synonyms

0
votes
1answer
21 views

Serial console unreliability woes

I am trying to make the GPIO serial port of a Raspberry Pi 2 with Raspbian Wheezy work with an elevator (to control its movement and check status). But before I even plug it into the elevator, I am ...
1
vote
1answer
47 views

Serial vs I2C speed

I'm interested in knowing which is faster, Serial communication or I2C. So far I have the following two snippets of information that I have found while doing a bit of research. Serial communication ...
0
votes
0answers
24 views

Raspberry Pi to Roomba communication serial port

I'm developing a program in C where I want to communicate a Raspberry Pi with the roomba robot by the serial port, and I've got some problems. First of all, I have the source code where I connect to ...
0
votes
1answer
31 views

Can't send data via serial port from Rasp Pi2 to Dell D630 laptop

I want to connect old Dell Latitude D630 laptop with my Raspberry pi 2 via serial port. I have been following tutorial on this page and another here. Unfortunately I can't transmit any data from ...
0
votes
1answer
29 views

pigpio and 1wire working together

I want to have two more-or-less independent programs running on my Raspberry Pi, one that monitors temperature and another that does protocol translation between two asynchronous serial devices. I ...
1
vote
1answer
42 views

How do I create a virtual serial port for me to use?

I am testing a python application on the pi that uses a serial connection via usb to serial adapter. At the moment, I can't use the actual physical device its communicating with. So, does anyone know ...
0
votes
0answers
22 views

serial device communication problem with high baud rate

I have a serial device connected to pi´s USB slot. The device is detected in ttyUSB0. Aten uc232a usb to serial adapter is used between the serial device and pi. I have to run a read and write ...
0
votes
0answers
35 views

Serial device is not detected by pi

I have a serial device connected to pi´s USB slot. The device is connected to the USB port though internally the USB interface is connected to a USB-to-UART bridge.For programming purposes this means ...
0
votes
1answer
80 views

Python Serial library for RaspberryPi2 tutorial/command list

I have a problem with using the UART on RPi2. I tried every program found on the internet but nothing works. I checked every baud rate of my two BT modules but whatever code I use I've got errors ...
0
votes
0answers
41 views

Serial port connection problem

I have to communicate to a device which uses serial interface through the USB port. I disabled the Serial Port Login and disabled the Bootup Info. When I list the devices using lsusb, the device is ...
0
votes
2answers
45 views

Kernel log ONLY on serial console (UART)

How to configure kernel, config.txt and cmdline.txt to get all kernel logs (starting from boot) in serial console (UART) only? To clarify: I don't want to see any kernel log on HDMI monitor I don't ...
1
vote
0answers
31 views

Control the inclinometer with RS232 or UART

I have bought an inclinometer today to try some things. Inclinometer has two communication port; RS232 and UART. Which one should I select? Actually I tried both but none of them worked. I have ...
0
votes
1answer
63 views

USB / RS485 converter static mapping to /dev/ttyUSB

I need to map one serial port converter to static usb port so after my raspberry gets restarted I still have the right mapping. I bought this USB-> serial port RS485 converter ...
0
votes
2answers
87 views

How to create serial cable for Paspberry Pi with arduino micro?

I know it is possible to use arduino as usb to serial converter https://www.youtube.com/watch?v=qqSLwK1DP8Q). And I know it is possible to communicate with raspberry console from laptop over serial ...
1
vote
1answer
43 views

Using Rpi with serial debug ports

I have a question about providing power to Rpi through serial ports. Please let me know if the following would be possible. I would connect raspberry pi to beagle bone black through serial debug ...
0
votes
0answers
151 views

Connect RFID/NFC reader/writer using UART or SPI?

I have an Raspberry Pi model B, and I want to hook up this RFID/NFC reader I got. This is the one I have. It has TX, RX, VCC, and GND. When I try to hook up TXD -> RXD and RXD -> TXD (or TXD -> TXD ...
0
votes
1answer
50 views

How can I interface a serial GPS receiver with a Raspberry Pi?

So in India, this is the only very affordable GPS receiver I could find. It seems bizarre to me, it has a VGA port? I suppose it's used for serial communications, but there isn't any relevant ...
0
votes
0answers
62 views

Raspberry Pi and Serial Communication

Have you heard of MOXA? I have 2 Uport MOXA devices that would simulate as devices to be connected to com ports. Before this I use these 2 devices to create a program on windows that is able to send ...
1
vote
0answers
26 views

Raspberry Pi - Arduino connection can receive not send

I am using a Raspberry Pi and Arduino (for 433Mhz switched). My arduino code (short): void loop() { if (Serial.available() > 0) { // read the incoming byte: incomingByte = ...
1
vote
0answers
72 views

Not all devices that are connection via I2C are showing

I have linked this chip to my raspberry pi. I used these instructions to do it then installed everything I was told to install using these ...
1
vote
1answer
96 views

Arduino sends different numbers over serial to Raspberry Pi than Linux/Mac

I've set up an arduino uno to monitor room temperature and communicate this to my Raspberry Pi (old model B) over USB (2.0 cable) using pySerial to read the data on the raspberry pi side. The code I ...
0
votes
0answers
41 views

Raspberry Pi - Plink (Putty) - Kantronix KPC3 ISSUE

I am connecting to my Kantronics Packet Communicator 3 via Raspberry Pi Plink (Putty) console. For some reason it will not go into command mode. If I use the Putty GUI it works fine. For example ...
0
votes
0answers
58 views

Pi getting data from XinoRF

I'm trying to get the data from a DHT11 sensor connected to the XinoRF board. But it seems I get nothing from the wireless port ttyAMA0, but when I use the USB port ttyACM0, the python program seems ...
1
vote
1answer
48 views

Rasbian: Does it include a Serial Terminal to connect to the hardware serial port?

I have RPI A+ and with its single USB port, I am not able to install any software at the moment. (I have an USB hub on order) I am trying to test new hardware I designed and want to see the output of ...
0
votes
1answer
180 views

How to Connect 9 Volt RS232 to Raspberry Pi GPIO

I am trying to connect RS232 Port to Raspberry Pi using PL2303 USB To RS232 Converter and PL2303 USB To RS232 TTL Converter These Both connect at /dev/ttyUSB0 I try minicom command to read ...
1
vote
0answers
137 views

Serial LVDS camera interface

I am interested in using a camera module that is said to use a serial LVDS-camera interface. I want to use the grayscale version (VM-010-BW-LVDS) of following camera product: VM-010: phyCAM-S camera ...
1
vote
1answer
183 views

Set some GPIO pins OFF during boot, and ON later

I'm using +3.3V / GND / TX pins to power this 7-segment display with Serial Port connection. It works, but during booting time, the display displays random things, probably because it receives ...
1
vote
2answers
227 views

Data collection from raspberry pi and send to computer (without using Ethernet or Wifi)

I use the Pi as sensor data collector and would like to to transmit the data back to software that is installed on my computer (and probably the software will instruct the Pi to perform some tasks, ...
0
votes
0answers
274 views

UHF RFID Reader with Raspberry Pi

I have a RFID Reader like the one posted on this link: http://www.ebay.com/itm/EPC-Gen2-UHF-Integrative-5-7-Meters-Long-Range-RFID-Reader-with-free-SDK-/171473207602 It has RS232, RS485 and Weigand ...
1
vote
1answer
2k views

How to send Data

I get a GSM/GPRS Modem SIM900A Please tell me how to open url like http://abcxyz.com/xyz.html using GPRS?
0
votes
2answers
222 views

How should I properly communicate 2 Raspberry Pi via UART?

I'm testing serial communication with Python pyserial module. I try to communicate some strings between two Raspberry Pi's ... I tested transmitter and receiver code at same device connecting it's ...
0
votes
0answers
56 views

Python serial script prevents android connection

The python script below connects via "rfcomm0" to the "Bluefruit EZ-link module" on the "Arduino Uno" but prevents the bluetooth connection from my android app. If I change the script to use ...
1
vote
1answer
218 views

How to access SPI on Raspberry Pi B+

I tried searching here and other places. What is the best way to access the SPI and get the fastest speed out of it. My project involves interfacing the Pi with an ADC that is rated for 5Msps ...
0
votes
0answers
122 views

Interfacing DG600F coin acceptor module with raspberry-pi

I have seen this arduino code for interfacing a coin acceptor module using serial data.The link is this. I want to do this on a raspberry-pi since the pi is also having Rx and Tx pins.Is there some ...
1
vote
0answers
87 views

UART serial output pin held high, can't read usable information

I'm working on a home automation project where my Pi will be interfacing several picaxe chips using an UART serial connection. Even though I've installed Minicom on the Raspberry Pi and disabled the ...
0
votes
1answer
220 views

MCP3008 alternative

I have some analog devices like LDR, temperature sensors, and other sensors and I want to use the readings of these sensors in my raspberry pi B+ , for that I need an ADC , to convert the analog ...
3
votes
1answer
226 views

Simple Custom 1-Wire GPIO Communication Protocol between Master PI and Slave PI

I have 2 Raspberry Pis in my system. One can be 'docked' to the other one and some time later it can become 'undocked'. While docked, the 2 Pis will have a connection between 2 GPIO pins ( 1 pin on ...
1
vote
1answer
115 views

Raspberry Pi as USB serial device

I have two Model A+ Pis and a Model B+, as well as a couple of USB A-to-A Male cables. I want to be able to have the A+es able to communicate over serial to the B+. The reason I'm doing this is ...
0
votes
0answers
107 views

Xbee Pro + Raspi-Arduino Connection Bridge

I'm trying to make a GPS+Radio node using XBee and Raspberry Pi. To connect the XBee module to the raspberry pi I'm using a Raspi-Arduino Connection Bridge from Cooking-Hacks.com My question relates ...
0
votes
0answers
397 views

read a RFID card MiFare 1k classic through a PN532 uart reader with serial.read()

I'm trying to read my rfid card MiFare 1k classic with a PN532 breakout board through UART with a simple python script. I installed libnfc, the nfc-poll example program reads my card perfectly fine. I ...
0
votes
0answers
65 views

How can I read if there's any activity on the serial port?

I have a PIR-sensor and a controller hooked up to my USB, and I can read in the Terminal the controllers output if there's any motion using serial.readline(). But what I really want to do is just to ...
0
votes
0answers
82 views

Python script always throws exception the first it is ran after reboot

I am trying to build a home automation system with Raspberry Pi connected to Arduino Uno via USB. Everything works but the Python script that I am using for reading variables from Arduino is always ...
0
votes
1answer
117 views

Sending data to a 1602 LCD in Mono C# over i2c

How would I be able to put information on a 1602 lcd over SPI? I was thinking that it may be possible to write to the pin (like a file) with all the hex codes of the letters etc. or similar. I'm a ...
1
vote
2answers
2k views

How can I test if the serial / UART is good on a raspberry pi?

I've purchased a used raspberry pi and have followed the instructions from Wolf Paulus's Journal to connect to the pi from my computer using a PL2303 USB adapter. The specs on the PL2303 adapter say ...
1
vote
1answer
120 views

Is it possible to connect zigbee and a GSM modem over the same RX, TX GPIO pins of Pi?

I would like to connect a XBee module (Zigbee) and also a GSM modem for voice and SMS. From what I have seen, mostly both uses the Rx, Tx pins of Pi for serial communication. Other option would be to ...
2
votes
1answer
303 views

Unable receive character properly in UART

I am trying to send and receive character using UART (GPIO14 as Tx & GPIO15 as Rx). I can transmit character successfully which I can check on minicom. Now I have short my RX and Tx pin so that I ...
1
vote
1answer
1k views

Reliably Reading from the Serial Port in Python

I am trying to communicate between a pair of RPi's both with Ciseco XRF Radios on Slice of Pi's. My end goal is for RPi1 to send a specific phrase to RPi2 which will pick it up, perform some ...
0
votes
2answers
175 views

Level shifters for serial communication to an arduino

I want to send info from a raspberry pi to an arduino and vice versa using serial communication. Do i need a level shifter to accomplish this? Or can i communicate between the two without a shifter? ...
0
votes
3answers
111 views

Checking all the specific GPIO pins if it is HIGH or LOW and putting it in a CONDITION

Can you give me an idea on how to check the statuses of specific GPIO pins if it is HIGH or LOW? My project is all about checking the statuses of GPIO pins (6 GPIO pins). I want to check all of the ...
0
votes
0answers
91 views

Delay in Communication Between Arduino and RPi

I already asked a question regarding communication between a Arduino and RPi through a USB serial connection and was able to solve major issues. Now my RPi and Arduino are talking to each other and ...