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Questions tagged [peripherals]

Peripherals are devices connected to the Raspberry Pi, but external from it.

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1answer
28 views

Only allow a specific peripheral to be connected to a USB port

I am turning my raspberry pi prototype device into a market product. The data and the program running on the pi must be protected. But we have a USB webcam attached to it (provided by us, hence we ...
0
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1answer
33 views

Wiring on RPI3 when connecting two peripherals - microcontrollers simultaneously

I am currently having an ADC(MCP3008) connected to a rpi3, using the following wiring map, in order to read data from analog sensors. MCP3008 -> RPI3 VDD -> 3.3V VREF -> 3.3V ...
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0answers
61 views

Single channel SPI DMA

The documentation on the SPI peripheral says: Two DMA channels are required, one to read from and one to write to the SPI. Is this necessarily true? I have a device where I need to write a few ...
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0answers
167 views

Dalsa Genie GigE vision camera for Raspberry Pi

I am setting up a camera with my Raspberry Pi to test an optical layout on a high altitude balloon mission. I am using a Raspberry Pi model B. The camera will be required to take a still photo every ...
3
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1answer
333 views

SPI DMA and continuous transfers

I'm building a project using the MCP3914 8-channel analog front end (ie ADC) device connected to the Raspberry Pi's SPI peripheral. The device has a continuous read mode where you request the value ...
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0answers
24 views

Do older raspberry pi accessories (specifically cameras) become obsoleted and experience reduced-price sales to the public? [closed]

I have an older Pi B with 512MB of RAM. I'm considering volunteering to help a local publicly funded park with a raspberry pi nature camera project, but I anticipate no funding from them, at least to ...
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0answers
47 views

Program inexplicably terminates upon calling open()

I have code that is attempting to open /dev/mem for mapping a peripheral register for manual usage. Specifically, I am attempting to access the UART registers directly. I have a function called ...
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2answers
105 views

How to interface to a Pi without knowing its IP or having a large HDMI monitor?

I wish to access a RPi's shell, but I do not wish to lug around some big display and ideally 120 volt power wouldn't be required. A Linux or Windows laptop are acceptable or maybe some other typical ...
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0answers
39 views

How get old Apple bluetooth keyboard and mouse recognised

I have an old Apple Bluetooth keyboard and mouse from about 12 years ago. They can still connect to my newer Mac laptop, but the Pi 3 bluetooth adaptor cannot see them at all. According to Apple's ...
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1answer
145 views

How to use the DMA-DREQ/PANIC threshold of the hardware-PWM

I'm using the hardware PWM that is described on page 138 of the BCM2835-ARM-Peripherals document. The description of the DMAC-register (page 145) indicates that one can set the FIFO-threshold at ...
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0answers
129 views

SUID executable doesn't work for `/dev/mem` access

Here is explained how to gain access to the peripheral without being root. I've just tried in my environment (Raspbian Stretch, RPi2, Qt5.9) in this way: int main(int argc, char *argv[]) { ...
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0answers
226 views

How can i use the rPI Zero as iPhone7 dock? (Audio from iPhone to rPi aux and charge iPhone)

Since I own an iPhone7 and a car that doesnt support Bluetooth or Other Carplay options i had the idea of using the raspberry Pi in order to play music and charge my Phone simultaneously through one ...
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1answer
1k views

Recording landline phone calls

My cell phone is recording all phone calls (using Automatical Call Recorder on Android) and this has helped me a lot of times (both because I didn't hear something very clearly or as evidence for ...
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0answers
122 views

Wolfson Pi to work in Raspbian jessie

I have Raspberry Pi mod B with Jessie installed. I want to add Wolfson Pi Audio card. The user manual says I have to write another image onto the SD card which is specific to Wolfson Pi. How do I ...
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2answers
1k views

Use Android phone as display for RPi3

I have Raspberry Pi 3 (connected to LAN and Internet via Ethernet cable) with: Wi-Fi hotspot settled up and working; TightVNC server running at startup. I can connect to it using my PC or Android ...
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0answers
445 views

Can a PCI-E x1 to x16 via usb riser be used for pci-e on RPi?

I am trying to figure out how to put a GPU on a Raspberry Pi (I have a B+ but am getting a Pi 3 soon), and I'm wondering if, power issues aside, it would be possible to use a PCI-E x1 to x16 via USB 3....
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1answer
38 views

Peripherals power usage

I am trying to measure the power usage of a Raspberry Pi peripheral, say a temperature sensor, and compare it with wall power input to the Raspi. Is there a device that measures the power a ...
5
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2answers
4k views

RPi 3 Model B: PSU, Measuring Voltage & Amps

I cannot, for the life of me, get enough power into my pi so the mouse & keyboard are operable. I have a RPi approved usb hub (Belkin: Hi-Speed USB 2.0 7-Port Hub) powering the mouse and the ...
2
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1answer
988 views

Shutdown Button for Raspberry Pi with HiFiBerry Amp+ HAT

I am able to create a shutdown (and reboot) button for a plain Raspi harnassing the fact, that shorting Pin 5 to GND will reboot the Pi if shutdown. However, when adding the HifiBerry HAT things ...
2
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2answers
1k views

How to operate a cooling fan using GPIO pins, RaspPi2

I have little to no experience with any form of computer software coding/editing but I have managed to get EmulationStation working (sort of) on my Raspberry Pi 2. I have a bought a fan and plugged it ...
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0answers
88 views

Infrared remote on Raspberry Pi

I want to make an infrared remote with my Raspberry Pi to controle my TV (Samsung) and other things, but I don't know how it works. I found the "Infrared Hex Codes" of my TV for power: 0000 006d ...
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2answers
78 views

Looking for a simple RaspberryPi keyboard with USB hub to connect mouse to [closed]

I have a RaspberryPi model B with 2 USB ports and I would like to connect 3 devices: Keyboard Mouse USB Flash Disk I would like to do this without using extra USB powered hub. Is there any low-...
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0answers
251 views

Problem installing Bluetooth Dongle on Raspberry Pi 2 running Windows 10 IOT Core

I recently got an Orico BTA-403 (officially supported) bluetooth dongle and inserted it into my Raspberry Pi 2, Model B running the most recent version of Windows 10 IOT core. I rebooted, and then... ...
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3answers
1k views

Using Pi 2 as feedthrough of mouse/keyboard to computer

The goal is to connect a mouse to my raspberry Pi, and have it connected to a computer (both linux and windows will be used). I want to have a LED light up whenever I use a right mouse click. So the ...
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0answers
96 views

How to use Pi to remote control a cell phone in another country

I work in the US and help develop a mobile that is used in lots of countries, especially emerging market countries. I often need to test the behavior the app in those countries. Currently the only ...
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2answers
244 views

Driving 32x32 LED grid via GPIO preventing other processes from running

I have a project running a 32x32 LED grid based on these instructions: https://learn.adafruit.com/adafruit-rgb-matrix-plus-real-time-clock-hat-for-raspberry-pi/driving-matrices which relies on these ...
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0answers
66 views

My USB2VGA is working - How do I configure X to use that screen?

I have a green screen on my USB2VGA connection (DisplayLink). How do I configure X to use the screen /dev/fb1 which exists? I do not find an xorg.conf.
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0answers
2k views

How to setup resistive LCD touchscreen over SPI

I've been following a guide for setting up an LCD touchscreen, without success. When the screen is plugged into the GPIO pins it just shows a white screen. After all my attempts it remains white. ...
2
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1answer
4k views

For communicating with a modbus rtu slave using rs485 to usb converter, does Raspberry Pi require any configuration?

I have a modbus slave device and a rs485 to usb converter. I used the converter and successfully read data from the slave device with my laptop but when I try to use it with the Raspberry Pi I am ...
2
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5answers
187 views

Use Rasberry Pi's Usb Ports for Broken Computer

The usb ports on my macbook pro are broken, so I thought that it would be possible to connect it to my raspberry pi over a local wifi network (or something like that) so that I can use usb devices, ...
3
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0answers
200 views

Adafruit Retrogame library will not send character press events

I'm trying to build a small arcade cabinet powered by the Raspberry Pi 2. I've got several arcade buttons (for ABXY, Insert Coin/Select and Start) and an 8-way joystick. I'm following the tutorial ...
4
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2answers
555 views

Raspberry Pi (Low) Power - Damage?

If the Raspberry Pi B+ is not receiving enough power and I try to use it, will it damage my Pi or peripherals?
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0answers
536 views

send_packet: Network is unreachable Huawei E3351 3G Dongle

I have a Huawei E3351 3G dongle connected to a Pi which requires maximum unattended uptime. Ensuring that the connection remains solid over time has been a troublesome endeavour, largely due to ...
1
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0answers
288 views

Precision ADCs for Raspberry Pi to minimize Gibbs phenomenon?

I would like to generate stable volts from 0 to 5 and to minimize Gibbs phenomenon without losing measurement data. I get much sudden peaks in Raspberry Pi 1/2 which I can control by adding low-pass ...
0
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2answers
914 views

Raspberry pi location detection [closed]

Id like to create a small "car" alike robot (4 wheels and steering via servo) that will travel around my house. Id like the robot to be able to go and charge itself when its batteries are low, I do ...
1
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1answer
155 views

powering raspberry pi B+ through the USB port

I am enclosing my raspberry pi B+ into a camera case due to which the micro USB power plug on the pi is not accessible, I was thinking of powering it through the normal USB port. https://www.youtube....
3
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2answers
676 views

How to power Raspberry Pi 2 B with a powered USB hub that also powers peripherals?

I currently have a Raspberry Pi 2 B that I am trying to run off of a 2.5A 5V powered USB hub, while also having my peripherals off of that hub. I have the output of the hub to the regular Pi USB slot, ...
9
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2answers
15k views

Can the Pi Emulate an HID device with via USB? [duplicate]

Does the Raspberry Pi model B+ have the capabilities of acting as a Human Interface Device (HID) with no extra hardware (other than a USB to USB cable)? I saw this question but it was about ...
1
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1answer
2k views

Using a power supply to power Pi and Pump

I asked a questions about controlling a water pump with the pi and in one of the answers (https://raspberrypi.stackexchange.com/a/32014/19436) he mentioned I could get one power supply to power both ...
0
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1answer
3k views

Making phone calls from a Raspberry Pi [closed]

I'm wondering if there is a way I can make phone calls (not over the internet) from a Raspberry Pi product I'm developing (only make them, not receive them). I thought on the following approaches, ...
0
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1answer
110 views

Is it possible to have a 3G and bluetooth on a raspberry pi?

Sorry for this question but I'm new on Raspberry PI. I'm trying to develop a prototype that will need to connect to bluetooth devices, like smartphones, and have an Internet connection. Because I don'...
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2answers
9k views

Rapsberry Pi Mini-fan not working

I have installed a mini-fan (cooler?) with a heatsink in a Rapsberry Pi Model B+ but it is not working. I mean, it is not moving. It only turns on when the processor is hot? Do I need to install any ...
1
vote
1answer
634 views

Advice on Using the Pi2 as a NAS vs NAS device with Pi2 attached

I want to build a home NAS and with my Raspberry Pi 2 and also have XBMC installed on it and need some advice on the route to go. The storage will be used to stream movies from (via XMBC) and also to ...
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1answer
89 views

Must I keep mouse and keyboard plugged in

I'd like to install openelec on my pi2, after I have the pi the way I like it can i unplug my peripherals and have it boot up without kb/mouse
2
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2answers
862 views

Programming a non-audio headphone jack peripheral [closed]

I have been given a scentee which I would like to program to be usable with my Raspberry Pi. This device connects to smartphones via the headphone jack, and needs to be charged seperately, so I don't ...
2
votes
1answer
166 views

Eject ipod from Rpi without disconnecting

This is not a question on how to umount a drive. I have a 2nd gen ipod nano (old) that works great but has 0 battery life. I figure if I plug it into the raspberry, it can power it and it does. ...
4
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3answers
349 views

Finding a relay capable of being constantly switched?

I've got a Raspberry Pi and some Christmas lights. I would like to use the Raspberry Pi to control the Christmas lights by switching them on and off with a Python script. The programming aspect of ...
1
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2answers
234 views

Will attaching an Adafruit TFT consume/block all the GPIO pins

I'm thinking of picking up this TFT screen for my pi, and can't quite figure out from the images, if it's going to require use of all/some of the GPIO pins on the board, and whether they'll still be ...
0
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2answers
3k views

Interfacing with a Winbond W25Q64BV flash chip via SPI

I'm trying to interface with a Winbond W25Q64BV flash chip via SPI. I started off by testing it on Arduino (target is a Raspberry) as I found a few implementations before I got started. Most notably ...
3
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2answers
14k views

Barcode Scanners compatible with Raspberry Pi

I would like to buy a barcode scanner to use with Pi, so which one will be compatible with Pi..?? Something around $50 would be great, like the Barcode Scanners we use at POS (Point of Sale), ...