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

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16 views

How to send Data over GPRS using GSM/GPRS SIM900A modem with Raspberry Pi Model B+

I am try to make a system for my college project, which can get data from a MicroController device's RS232 port to Raspberry Pi Model B+ and send it to a web server using GPRS. I get a GSM/GPRS Modem ...
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2answers
19 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 ...
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0answers
11 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 ...
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1answer
60 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 ...
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0answers
25 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 ...
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0answers
39 views

Xbee Communication with raspberry pi [duplicate]

I am looking for a way for two raspberry pis to communicate with eachother via Xbees. There is very little documentation online about this. My goal is to send a bunch of integers between the two pis ...
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2answers
56 views

“Inappropriate ioctl for device” error since upgrading Rasbian & firmware

I was happily controlling Shiftbrite LEDs using SPI and Python based on this code Today I upgraded my Pi using sudo apt-get update && sudo apt-get dist-upgrade sudo rpi-update Now my ...
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0answers
40 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 ...
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1answer
59 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 ...
2
votes
1answer
66 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 ...
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1answer
58 views

Raspberry Pi as USB serial device

I have two Model A+ Pies and a Model B+, as well as a couple short USB A-to-A Male cables. I want to be able to have the A Pluses able to communicate over serial to the B Plus. The reason I'm doing ...
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0answers
32 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 ...
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129 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 ...
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0answers
34 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 ...
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0answers
51 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 ...
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1answer
75 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
243 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
87 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
50 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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1answer
180 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
129 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
76 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
59 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
56 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
158 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
117 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
72 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
395 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
28 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 ...
2
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2answers
328 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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143 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
79 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
386 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 ...
0
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0answers
75 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
2k 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
149 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 ...
0
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1answer
97 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
649 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
973 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 ...
0
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3answers
2k 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+ ...
0
votes
1answer
811 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
72 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
129 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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0answers
177 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 ...
0
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1answer
29 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 ...
2
votes
0answers
75 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 ...
0
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0answers
77 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
210 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
2k 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 ...
1
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1answer
394 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 ...