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

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15 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 ...
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16 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 ...
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0answers
15 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 = ...
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0answers
32 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 ...
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1answer
66 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 ...
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15 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 ...
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45 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 ...
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1answer
24 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 ...
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1answer
94 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 ...
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1answer
153 views

how to connect RS485 Port to Raspberry Pi?

I have a battery controller which give Voltage of battery via RS485 Half Duplex Transmission using RJ45 port. we can connect this device to windows pc using these cable/convertors. When we ...
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40 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 ...
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1answer
88 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 ...
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2answers
119 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, ...
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0answers
106 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 ...
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1answer
340 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
72 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
41 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
108 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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69 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
59 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
120 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 ...
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1answer
125 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
72 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
67 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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255 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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44 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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64 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
90 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
706 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
102 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
67 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
240 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
335 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
104 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
74 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
69 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
190 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
250 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
83 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
611 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
32 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
413 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
188 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
89 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
624 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
106 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
3k 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
191 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
118 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
950 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 ...