Questions tagged [pi-2]

This refers to the quad-core Raspberry Pi 2 (currently only available as a "B" model with Ethernet and four USB ports), with 1 gigabyte of RAM.

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Program stops running midway using OpenCv

Good evening. I wanted to track hand and body movements on my Raspberry Pi 2B (Debian 10 Buster), however, I keep getting this error in Thonny IDE: Backend terminated or disconnected. Use 'Stop/...
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Possible to connect non-local rasberri pis to create mesh network?

Hello I am new to Raspberry Pi's and need to use them for my school project. Each of my group members were given one raspberry pi from the school, and we wanted to make a mesh network with them for ...
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Install Mediapipe for Raspberry Pi 2B

I'm a high schooler looking to use the cvzone module, which requires mediapipe, for my project. However, I'm getting errors in importing and I wanted to know if it is even possible to download ...
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RP2 Frozen on Startup

I have a RP2 that's frozen on startup. I can replicate this issue. It is headless, so terminal only. No errors, and progresses through startup until I get to: Started Make remote CUPS printers ...
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How is Ubuntu "64-bit ARM" offered for Pi 2?

Canonical offers Ubuntu for "64-bit ARM" and gives "Pi 2" as an example of a compatible platform. Raspberrypi.com says the Pi 2 is "32 bit". How does that work?
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32 bit Ubuntu Server 22.04 LTS lower GPU Memory

I have a raspberry pi 2 with ubuntu sever installed and need to know how to lower the gpu settings from 64 megs to 16 megs. Ubuntu Server does not come with raspi-config installed.
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Raspberry pi 4 is not booting with Disk image that is working on Raspberry pi2

I am new to this project. The project was developed in 2015 using Raspberry pi2 and a 7' touch display. The disk image works perfectly on Raspberry pi 2. I tried to flash the disk image to an SD card ...
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RPi 2 GPIO UART can send data to Teensy, but can't receive

I am trying to send data between RPi 2 (model B) and Teensy 3.2 using the GPIO on the Pi (GPIO 14 and 15) and Serial2 on the Teensy (pins 9 and 10). The problem is, I can only send data from the Pi to ...
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raspberry pi 2 model b hdmi no signal

i have a Problem with my raspberry pi 2 model b. it has retropie installed and it used to work fine. Now it says "no signal". What i tried after some research: different cables and monitors ...
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Tensorflow vehicle detection on Raspberry Pi 2B

Here is the finished project I have in mind. Raspberry Pi 2B with a USB webcam connected, running some sort of object detection python program (using tensorflow or tflite), detecting vehicles going by ...
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Help with Pi connected to lcd display

I connected my Pi to a 4in lcd display because the screen is split into four. I am not sure how to fix it to be in landscape mode and only one displaying. I've tried going into config.txt and using ...
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Will the arducam 16mp autofocus camera work on a raspberry pi 2?

I will be getting this camera, the arducam autofocus camera, https://www.arducam.com/product/imx519-autofocus-camera-module-for-raspberry-pi-arducam-b0371/ and a raspberry pi 2 for my first project. I ...
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Usb wifi adapter RTL8811AU not recognised on Rasberry pi Model B ca. 2011

I can't get my wifi dongle (RTL8811AU realtek usb) working on my Pi from 2011 (model B running Raspbian GNU/Linux 11 (bullseye)). I know this has been asked before and I have followed several rabbit ...
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Problem turning on Raspberry Pi 2b

I have a Raspberry Pi 2b that I have trouble turning on 1_When I insert the SD card containing the operating system into the Raspberry Pi and connect it to the adapter, sometimes the green light turns ...
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Help How to download drivers for a Belkin Wireless G Zydas firmware

I need help on how to download drivers for a Belkin Wireless G Zydas firmware. I have no idea how to. Thanks
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How to receive the CAN messages from the ECU via mcp2515 Transceiver connected to Rasberrypi?

MCP2515 connected to Rasberrypi, CANH and CANL Of ECU connected to Mcp2515 transreceiver. using candump can0, I am not able to receive the CAN messages. Can anyone suggest what should be done. Thank ...
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How can I control a Cambridge Audio CXA81 amplifier using its "IR IN" input?

I would like to control the volume on my CXA81 from a Raspberry Pi. I already use a Serial HAT to send control codes to the amplifier. However, unfortunately, the volume may only be controlled using ...
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Talking to MAX31865 from Raspberry Pi using Serial Peripheral Interface

I am trying to talk to the MAX31865 board from a Raspberry Pi over SPI but am not getting the results I'd expect. Can someone with more SPI experience take a look at my setup and point to what I may ...
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Raspberry Pi 2, repair hardware damage

I bought two damaged Raspberry Pi 2s. Both don't boot regardless of the SD cards content (SD card is working in different Raspberry Pi). Both LEDs are steadily on. The previous owner told me that the ...
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Raspberry Pi zero 2 with Ubuntu 18.04

I tried the method to copy and modify bcm2710 and config.txt and it works well for Ubuntu 20.04 on Pi zero 2, however it doesn't work for Ubuntu 18.04, anyone has any suggestion? Thank you so much.
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Running Raspberry PI buildroot image in qemu

I am trying to build a linux image for raspberrypi3 with buildroot and run it on qemu. Once the make process is done i can copy the sdcard.img file into a SD card and correctly run the OS on a real ...
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Transferring files from raspberry pi 3 Model B+ to raspberry pi zero v1

I have a raspberry pi zero v1 and a raspberry pi model 3 B+. The second one has some testing files i want to transfer to the first one. Right now i’m ssh’ed into both raspberry pi’s (I’ll call them rp’...
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apt update stuck at 0%

My Raspbian installation is only a few months old because my old SD card was broken. I started with a fresh install and everything was working smoothly until a few days. I loged, started to ...
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How can I switch windows (BringToFront) by code?

I'm running Raspbian Pi2 v11 (bullseye), in the GUI, and I have two full-screen applications running (one of them is a web browser). But I need to switch the visible application via code; I'm looking ...
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Can the Raspberry Pi 4 do h265 encoding?

I would like to know if the Raspberry Pi 4 can do H265/HEVC Encoding at all. I am not bothered if it can't do it in real time as I would like to run jobs for encoding the video in the background, ...
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Raspberry Pi Raspbian switching Multiple Desktops by application

I'm running Raspbian Pi v11 (bullseye), and I'm booting into the GUI. I'd like to set up two desktops that will run a single full-screen app on each (example: one is a web browser). And then via my ...
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Indecipherable Characters with UART on Pi 2

I am attempting to use the UART pins on the Raspberry Pi 2 to interface with the console port on a Cisco Access Point. I've stripped an old RJ45 cable to connect the right TX, RX and GND pins from the ...
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Raspberry Pi 2 B Tkinter performance problem

I am trying to write a simple python program for a Rasperry Pi 2 Model B. When finished it should be able to get a few values via uart and display one out of 200 images based on that. Additionally, it ...
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How can I send video and sound from my PC to raspberry pi 3?

I have a laptop. On other side of room is my raspberry pi 3 with TV and speakers in input. Normaly i would use hdmi cable to connect my laptop and tv, but it to far to do that. I decide to use ...
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Pi 2/3 (Buster installed) to Pi 4 migration, what is to consider?

I found many comments, that the migration from pi2/3 to pi4 requires some changes, mainly because the boot partition has to be larger there. But in my understanding, the boot partition size isn't ...
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How to uninstall zram from Raspberry pi 2?

I installed zram from https://github.com/foundObjects/zram-swap but I am experiencing some lag issues.I cant find the command to remove it from Rpi.
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Raspberry Pi 2 Access Point is not working after activated EddyStone BLE

I'm beginner. My setting Access Point sudo apt-get update sudo apt-get upgrade sudo apt install hostapd sudo systemctl unmask hostapd sudo systemctl disable hostapd sudo nano /etc/systemd/network/...
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Sim7600 usb issues during GPS bursts

I have a RASPI2B+ connected to a LTE module SIM7600. In addition a wifi adapter RTL8188 is used as AP. I can connect easily with LTE network (AT+CNMP=38) but, when select GSM (AT+CNMP=13) it goes ...
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Connecting to a u-blox7 USB GPS sensor

I am trying to connect to a U-Blox7 USB GPS sensor, following the steps outlined here. The device is detected, but not receiving GPS data. I am not not in a shielded area. Checking that the device is ...
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Raspberry as a continuous streaming player

I'm new with Raspberry and i need help. I have a Raspberry pi 2 model b and i want to play an audio Stream (shoutcast) at startup. It should check itself every 30 seconds and if the stream is not ...
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RasperryPI remote access

I recently set up a rasperberryPI for a client, which went well. This raspberryPI has its own wireless network which is used to interact with the device. I've read in threads that it's possible to ...
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AC current measurement with ACS712 and Python

I'm currently trying to program my ACS712 5a current sensor to my Raspberry Pi. At the moment I have hooked up my current sensor via ADC (ADS1115) to the Raspberry Pi 4. ADC seems to read the ...
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DAC hats compatibility RPi2B

new to RPi and using a 2B that was a gift to my son years ago but never used. I would like to buy a digital out DAC HAT but all those I see show compatibility with 3, 4 and Zero but don't seem to list ...
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Problem with sequencing 2 proximity sensors using Raspberry PI and Python

I am trying my first (self-written) attempt at using a Raspberry pi for an electronics project and I thought it would be simple with all the great help that people generously put on-line. I am ...
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Boot Raspberry Pi 2 with SD card from Raspberry Pi 4

I have a working setup inside SD card, which I used on Raspberry Pi 4 successfully and now I want to use it also on Raspberry Pi 2. Currently I cannot make it run. It shows always initial multicolored ...
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USB Boot doesn't work with raspberry pi 2

I recently received a raspberry pi 2 from my neighbor. I already have a rasperry pi 3 in use myself for my HomeAssistant. For HomeAssistant I use a 16GB usb. On the raspberry pi 2 i want to install ...
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Is it possible to Mine XMR (Monero) on a raspberry pi 2b?

I don't care about the slow power or the fact it's not profitable. I just want to do it as a fun project :) I tried to install XMRIG as shown in a guide, but it appears I need a 64bit machine to use ...
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Raspberry Pi Buzzer delay

this is my first raspberry pi project and it’s for university. I have a led, a button a buzzer and a servo motor connected, they all work perfectly fine. The idea is, when the servo motor is moved, ...
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GPIO change state record

I'm looking for a way to record Datetime and state of GPIO, but just want a record when the state change. I have this in my code: temp_def = 30.0 while True: print(read_temp()) if(read_temp() &...
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GPIO.cleanup() did not work after continous cleanup process

I have one doubt, I'm using raspberry pi 3 b+. When I playing Raspberrypi with a 5v relay, I have used the continuous cleanup() process. After few minutes my raspberry pi was not cleanup(). It's not ...
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12V Switch advice

I’m new to RPI and have a project. Please take a look at the fire switch on the diagram. I would like to add a RPI on that loop and see when the fire button is depressed. This is a 12V system so any ...
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RPi 2B - Ubuntu Server 20.04 LTS fails to boot, but Raspbian works. How to further troubleshoot?

I'm trying to flash Ubuntu Server 20.04 LTS using the Raspberry Pi Imager for my Raspberry Pi 2B, but boot fails on the blended colors / rainbow screen and blinks the green LED seven times. As I ...
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Cannot run a script after reboot using Cron

I'm trying to start a script containing cgminer for mining when the raspberry pi reboots however it doesn't. My crontab contains the following. @reboot sleep 120 && sudo /home/pi/StartVPN.sh @...
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Is it impossible to boot from SD card once USB/SSD boot is enabled in Raspberry Pi 2?

Based on this documentation: To enable USB host boot mode, the Raspberry Pi needs to be booted from an SD card with a special option to set the USB host boot mode bit in the one-time programmable (...
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Broken Image icon instead video on raspberry pi motion [closed]

I fresh installed Rasbian and Motion on my Raspberry and can see the Motion HTML interface in the browser via http.
 But instead of the video there is a broken image icon. Update: I try the command ...
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