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

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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 ...
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1answer
18 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 ...
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2answers
73 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 ...
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1answer
46 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 ...
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1answer
21 views

Missing /dev/ACMX on Arch linux ARM when connected to Arduino

I want to be able to communicate with my Arduino serially using the pySerial module; however, when I connect using usb, no /dev/ttys appear - the device only appears in /bus/USB/001. When I plug it ...
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0answers
60 views

Optimize XBee UART Reading with Qt on FTDI /dev/ttyUSB0

I am receiving XBee data on a /dev/ttyUSB0 FTDI device on the Raspberry Pi with Qt's QSerialPort. I've instrumented the code on the receiving end and sending end, which is a separate computer. The ...
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1answer
67 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 ...
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1answer
49 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 ...
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2answers
49 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? ...
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3answers
45 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 ...
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0answers
39 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 ...
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3answers
101 views

115200 Baud Rate Problem for Raspberry Pi /dev/ttyAMA0 vs /dev/ttyUSB0 with XBee Radios

I'm have 2 XBee Radios and 2 Raspberry Pis. I have the 2 communicating with the XBee radios set to 9600 Baud on the TX and RX lines from the Raspberry Pi. I recently bumped the XBee radio default ...
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2answers
81 views

Arduino to RPi serial Communication

I'm trying to get my Arduino to send my Raspberry Pi some ultrasonic information via a serial connection via the USB cable. I am close but my RPi is reading the input from the Arduino clipped ...
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1answer
60 views

Extracted SMS body and passing it in a condition (Python)

This is my class for checking unread messages def CheckUnreadMsgs(ser) print "Check for new messages...\n" ser.write("AT\r") time.sleep(3) line = ser.read(size = 64) print line ...
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1answer
133 views

Is it possible to use the mini UART and PL011 UART together on a rpi B+? [duplicate]

How to get more than one uart interface is a quite interesting question that I was not able to fully answer for my rPi Model B+ v.2 - the one with the extended 40pin connectors. To avoid this beeing ...
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0answers
21 views

Serial line hangs after first call

I have written a short program to monitor a serial line using the uart on GPIO-Pin 8/10. It works fine the first time I start the program, but hangs without any output the 2nd time I call it. To be ...
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2answers
166 views

9 Data Bits on UART pins?

I am wondering if it is possible to send 9 data bits framed with a start/stop bit at 1.25MBaud. I am currently using PySerial to configure the UART pins on the pi. I've stumbled across a few ...
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0answers
80 views

How can I use SDI-12 to communicate with a sensor?

I have sensors connected to the serial port GPIO pins on the Raspberry Pi, and these sensors require communication in the SDI-12 format. The only problem is, I can't find any online resources ...
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0answers
52 views

Multiple Arduino-Raspberry Pi serial

So, the question is, is the content of /dev/serial/by-id unique? Essentially the issue is I want to connect several (two or more) arduinos (potentially of different types, but they may all end up ...
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1answer
205 views

Connecting RFID reader over USB

I just purchased the RFIDRW-E-USB RFID reader from Priority 1 Design (see this page, datasheet available in PDF form.) I have tried to make it work on my computer (Ubuntu), before plugging it to my ...
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0answers
44 views

PySerial not responding after 10 seconds of inactivity

I've got the JY-MCU Bluetooth module connected to the hardware serial port on my Raspberry Pi. It seems to be working except for one thing: when there is no communication for about 10 seconds or more, ...
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0answers
1k views

Connecting to an RC522 RFID reader

I'm trying to connect an RC522 RFID reader to the a Raspi via its serial ports. Up till now, I have tried several different pieces of code that are supposedly working, however, I have had no success ...
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0answers
119 views

RPI ERROR: Unable to open NFC device

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 ...
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1answer
71 views

TTL serial connection weirdness

I've been trying to connect my Pi to my Mac using a USB-TTL cable. I followed this tutorial. On the terminal I get nothing when the Pi connects (not even sure if it connects at all). I've tried ...
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1answer
334 views

How can a USB Bluetooth Dongle be used as login TTY

I would like to be able to use a Bluetooth Dongle - not the HC06 module, but a simple USB dongle (the pretty generic kind, or even poundshop type) as a serial login console/tty. I have already tried ...
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1answer
596 views

Python serial permission issue

I'm trying to connect my Arduino to my RPi through python and PySerial, and I'm using the following code: import serial ser = serial.Serial('/dev/serial/ttyACM0', 9600) and I was getting an issue ...
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3answers
1k views

Connecting B+ to Serial Port

I have a recording device with a 9 pin dsub connector for control. Pin 1 == Ground Pin 2 == TxD Pin 3 == RxD Pin 5 == S. Ground 4&6-9 == NC I'd like to use the 40pin header on a raspberry pi B+ ...
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1answer
459 views

SIM900 to Raspberry

I've recently bought SIM900 with this module. Connected it to Raspberry Pi - GND, 5V, RX-TX, TX-RX. I'm using following code to test it (found on web): #! /usr/bin/env python import argparse from ...
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1answer
63 views

Permanent serial connection to Raspi

I can connect an arduino by serial to my laptop no problem using Processing. Is a Raspberry Pi likely to be able to maintain a permanent USB serial connection to the arduino, or am I likely to ...
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1answer
98 views

Serial string not being read consistantly

If I send the following string to the rpi echo "#q10" > /dev/ttyUSB0 Why does the whole string not get read each time its sent? This is the app output The code is as follows. I am using ...
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125 views

getting the rasberry pi to controll a tm1802 led strip

Hi i recently purchased a tricolor led strip from radio shack and while they are made for the arduino I am very sure they will work with the raspberry pi. They take in serial data (24 bytes) and use ...
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1answer
28 views

How to detect specific string over serial using c

I am connecting my raspberry pi to a device using the serial port to record data coming from the device at 19.2k. Currently I am using a usb to serial adapter, but this could change in future. The ...
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0answers
54 views

Slice of Radio and Ithobox

I've got a Raspberry Pi with Ciseco Slice of Radio and I'd like to control my Ithobox LINK It has an 868 Mhz RF transmitter/receiver and I also have the optional RF remote control unit which I'll be ...
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0answers
63 views

Not sure if serial connection is working

I have been trying to get this working for a couple of days now, and nothing I've read seems to fix it. I am working on trying to communicate with the pi via a serial connection. My current setup is ...
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1answer
166 views

Choosing an OLED / LCD Dispaly

I'm building a simple device where my Raspberry Pi talks to Google Calendar, and displays information about where I'm at on my office door. My code is all in Python It was simple until I started ...
2
votes
1answer
1k views

Arduino Serial Port via Raspberry Pi SSH

I have just bought an Arduino Uno R3 and I would like to view the Serial Monitor using my Raspberry Pi via SSH. I have looked around on forum sites but cannot seem to find the proper software or ...
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1answer
310 views

RaspberryPi to Arduino(leonardo) avoiding latency

I'm using a Python script via (TKinter)on the raspberryPi to capture mouse movement and events. My goal is to send this data, in real time, to another connected Arduino device(Leonardo). My first ...
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1answer
131 views

Need to initialize serial connection with screen

My Problem: I've got an Arduino connected to my Pi via /dev/ttyUSB0 and I always have to initialize the connection via screen, otherwise I cannot send any values via Bash or Python. What I'm doing: ...
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0answers
163 views

RPI send/receive data with serialoport node.js

I have RS232 and want to send data to Rpi with node.js serialport. I want to show data in command line but it does not display. How can I improve my code to display a data in Rpi command line? This ...
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1answer
56 views

No input on FTDI / Serial on raspberry

I have one of these: http://www.amazon.com/gp/product/B00FEAMUOK/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1 Hooked it up as described in in the last post here: Running Headless - checking Boot ...
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0answers
449 views

Receive data from uart! Raspberry Pi mono c#

I'm new and I wanted your help please... From today, after updating libraries Mono C# on my Raspberry Pi Rev 2 Type B (wheezy), the communication via serial no longer works, it seems to me very ...
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0answers
480 views

Set default baud rate on /dev/ttyAMA0 and keep after reboot

I have a ITead Studio GPS attached to my RasPi Model B 2.0's UART serial port and it's specifications require baud rate to be set at 38400. I am using gpsd on Raspbian, which attempts to use baud ...
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3answers
3k views

How do I display an image file (PNG) in a simple window?

I've got a prototype I need to show for an RFID project. I've got the RFID (Parallax USB) working, and the sample Python script (my first) is displaying the ID of the card just like it's supposed ...
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2answers
57 views

More control of serial?

I am trying to control some really old proprietary hardware. I hooked a scope up and could determine that I need to send it essentially 21 bits in a row. It is a clock. so the fist seven are hours, ...
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0answers
145 views

Problems reading data with usb to serial adapter

I made application in Java that receives requests over HTTP and forwards them to the serial port, and back. I am using RXTX Java library and usb to serial port adapter. From my windows machine where ...
2
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1answer
1k views

Raspberry Pi and the USB to TTL Serial Cable on Mac

I've logged all my progress here Raspberry Pi and the USB to TTL Serial Cable on Mac (unfinished). screen /dev/cu.PL2303-000013FA 115200 Here's the errors that I'm getting It just hangs with a ...
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0answers
149 views

Making Raspberry pi talk to MyRio

I have a project where I need to use a NI MyRIO from NationalInstruments and a Raspberry Pi. I need to be able to send some data from some sensors on the RPi to MyRio and from MyRio to the RPi. The ...
0
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1answer
323 views

How to connect rs232 board to PI

How to connect this rs232 board to the PI?
2
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1answer
61 views

making serial connection to my electronic dictionary?

I've recently found that there's 4 terminals on my old electronic dictionary, each labeled as "/RP TXD RXD GND". The dictionary is more than 5 years old, and runs on 1xAA battery. Is there any chance ...
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0answers
245 views

external port forwarding to serial port

I have connected a device with the raspberry pi on serial port. I can talk to the device from within the raspberry pi (works fine). I am using a dongle to connect raspberry pi to the internet. I can ...