Questions tagged [peripherals]

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

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7 views

How can i connect my usb/aux mic with my soundcard (alsasink) through a gstreamer pipeline?

I am working on a project where i want to talk to my microphone and have the system repeat what i was saying through soundcard. I am trying to find what is the link input i must give in order for the ...
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59 views

Can I record HD 1080 p 60 fps through USB on a Raspberry Pi 3 or 4?

I have a set-top box with HDMI output and want to record some programs from it on a Raspberry Pi (model 3 or 4). I found some HDMI to USB 3.0 converters with HDMI 'loop-out' which would enable us to ...
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1answer
43 views

Permission denied - Scheduling Witty Pi script

I am trying to create a new schedule for WittyPi (On/off scheduling of RaspberryPi). In the manual it seemed really easy (http://www.uugear.com/doc/WittyPi3_UserManual.pdf) but I fear I messed up ...
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23 views

How to connect raspi peripherals at a distance? [closed]

I would like to connect a few peripherals to my Raspi GPIO such as a access control keypad and ipcams. I know IPcams can run many meters on LAN cables but what is recommended for a peripheral such as ...
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1answer
53 views

Should I power RaspPI + peripherals from hub or use GPIO?

I’m planning my first “proper” Raspberry Pi project. I want the end result to be user friendly, and so should use only a single power source. But internally I need to power several separate devices: ...
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2answers
318 views

i2c communication problem with SSD1327 OLED display on a Pi 4

I have the following 128 x 128 OLED display: http://www.lcdwiki.com/zh/1.5inch_OLED_Module_SKU:MC01503 which is driven by a SSD1327 module. I'm trying to use this with a Pi 4 and the Luma.oled python ...
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3answers
352 views

What hardware peripherals might be capable of reading 6.144, or better yet, 9.216 megabits/second?

I'm hoping to interface a Raspberry Pi 4 with an 8 channel, 48 kHz ADC. Ideally a 24 bit ADC, which if my math is right means 9.216 megabits per second. But a 16 bit ADC would be acceptable: that ...
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1k views

Can the Raspberry Pi 4 be turned into a docking station?

I am currently researching vendors of docking stations to connect my peripherals with a MacBook Air (13" 2020). These devices connect to one of the USB-C Thunderbolt ports and provide various ports ...
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1answer
506 views

How to restart/release rfcomm for bluetooth communication?

I am trying to connect raspberry pi to my galaxy note to use it for serial communication. I have somewhat succeeded at that. First I paired it and trusted through bluetoothctl. Then I run sudo rfcomm ...
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64 views

Extend Official Display Connections

Is there a type of extender for the official Pi display connections? I don't mean the 15 pin FFC, but the two directly on the display. I'm mounting the driver board separately from the display in a ...
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128 views

Coin acceptor misbehave when connected on raspberry pi

I have a Bill note acceptor and a Coin acceptor, and I have wrote a program in C# to communicate with these two machines, and it worked perfectly on windows, after that I migrated this application to ...
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2k views

USB Dual Monitor DisplayLink Docking Station for Pi 4 B? I have WAVLink UG39DKx docking stations

My WavLink UG39DKx docking stations are USB 3.0, have an HDMI and DVI out, plus 2 USB 3.0 and 4 USB 2.0, plus Ethernet, plus Audio out. Is there a reasonable way to get the docking station working? ...
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1answer
215 views

ADF support for scanadf on HP scanner

I have installed SANE and I'm trying to scan pages with the ADF (automatic document feeder) of my HP ScanJet 8250. I found scanadf, but it does not use the ADF for scanning. I now read at the end of ...
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26 views

Simple wireless camera with API recommendations

I have a whiteboard and want to build a setup where I can press a button and have a picture of the whiteboard delivered to google drive. I have a raspberry pi that acts as a little toy server for ...
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3answers
650 views

Raspberry Pi 3B+ BLE peripheral : Android can't retrieve services list, OK with iPhone and Win10

I try to make a Raspberry Pi 3B+ act as a BLE peripheral. I downloaded latest version (5.50) of bluez stack here : https://git.kernel.org/pub/scm/bluetooth/bluez.git. I execute provided examples in /...
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3answers
13k views

PH-4502C pH Sensor Calibration and ADC using MCP3008, PCF8591, and ADS1115

I have a pH meter (DIY-4502C) hooked up with Raspberry Pi. However, the instructions to calibrate is in Chinese and seems outdated. Does anybody know how to calibrate it for measuring pH4-7?
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2answers
229 views

Ejecting USB dslr camera

I'm using gphoto2 to capture images with my nikon dslr connected to a raspberry Zero W My problem is that the camera stayes awake as long as there is a usb connection. How can I eject the USB ...
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1answer
106 views

Wiring that won't damage my pi [closed]

A while ago, I decided to wire up a Raspberry Pi (Zero W) to a few peripherals, but it stopped working shortly afterward (not entirely, but I think it was undervolting the power rails). I had ...
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1answer
40 views

pxe boot works but USB ports don't

I'm running a PXE server that provide the boot files perfectly. The raspbian jessie start well but the mouse and keyboard doesn't work. to create the respo, i've done a rsync on a working image ...
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2answers
886 views

Stream remote pi+rasp camera to another computer?

Hi is it possible to stream the video feed from a pi camera (3 b+ model) across a LAN to another computer running Linux? My idea is to see if pi can be used almost like an IP security camera where I ...
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1answer
39 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 ...
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1answer
54 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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1answer
294 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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640 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 ...
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1answer
1k 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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31 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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2answers
251 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
71 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
321 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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229 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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1answer
2k 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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2answers
2k 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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2answers
138 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 ...
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2answers
5k 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 ...
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1answer
2k 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 ...
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2answers
2k 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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2answers
153 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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274 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
2k 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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1answer
120 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
332 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
73 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
3k 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. ...
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1answer
5k 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 ...
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5answers
232 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, ...
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0answers
227 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 ...
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2answers
681 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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608 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 ...
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0answers
325 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 ...
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2answers
1k 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 ...