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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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I recently got a raspberry Pi 2B second hand and I found that when powered on both the red and green led turn on and stay regardless if there’s an sd card inserted in to board The Led’s don’t flash ...
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I'm trying to drive an I2C LCD screen. I know the device address from i2cdetect -y 1 It's 0x3f. I reset the screen by setting LOW and HIGH the RST GPIO 4 (the RST pin is connected to GPIO4). Then I ...
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I'm using this script to control GPIO18 : import RPi.GPIO as GPIO from time import sleep ledpin = 18 GPIO.setmode(GPIO.BOARD) GPIO.setup(ledpin,...
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Information about the board and OS OS: Raspbian GNU/Linux bullseye 11 armv7l Host: Raspberry Pi 2 Model B Rev 1.1 Torrent client deluge-web -v deluge-web 2.0.3 libtorrent: 1.2.9.0 Python: 3.9.2 OS: ...
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I am using ADS1X15 library to read analog data from ADC-1115 adc conver ter. I was successfully using this library as well as module for atleast 2 years. Now the Python through the error [Errno 121] ...
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I recently posted asking for help troubleshooting my Raspberry Pi 2 Model B v1.1, which appears to be "bricked." After some investigation, I believe I may have found the issue, but I need ...
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I have two Raspberry Pi 2 Model B v1.1 units. The first unit, which I will refer to as the "working" one, has a flickering GREEN ACT LED (but no lit RED PWR LED), indicating that it operates ...
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What types of power supplies can I utilize with my Raspberry Pi 2B? My understanding is that most recommend at least 5 V. Can I provide it with more volts than 5? Or would that destroy the device? As ...
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Using this script to provide a power report, I am getting the following while powering the Pi with iPhone power brick and the official Raspberry Power supply brick: -- using official Raspberry Pi ...
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I have a software image file that is used for running system on raspberry pi model B and ~50 microcomputers that are running on it right now. I need to somehow update this old pile of rust to a ...
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I have a misconfiguration of my MPD daemon on Raspbian Buster with Raspberry PI 2B. Alsa is configured as follows: pi@Wecker:~ $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: b1 [...
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I'm trying to get gps data through ttyAMA0 serial port. Sometimes I could get gps data but I also get errors such as OSError Error11 resource unavailability. It used to be working but I get errors ...
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Raspberry Pi network card is internally a USB card. Why then it has name eth0 and not usb0? I need to find a code, which is responsible for this. I am simulating Raspberry Pi with QEMU and having a ...
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If I understand it correctly: the two 5v pins are inner connected, so what's the purpose to design two 5v pins, please share a scenario that requires to use both 5v pins, thanks
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I have an old RPi 2 B which I've loaded the latest version of Raspberry Pi OS Lite onto. I'd like to use it to make an IoT device using an TFT LCD screen to show information like the weather and my ...
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I have a project where I control to access door with a Raspberry Pi. I want to connect two USB RFID readers to the Raspberry Pi. based on the read from each one, it will open a specific door. Right ...
Shwan's user avatar
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I wrote a script to display data on a led matrix, controlled by a few GPIO for line selection and SPI to feed data for this line. This was working perfectly 2 days ago, I let the script display random ...
low's user avatar
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I have a "Raspberry Pi (2 Model B rev 1.1)" wired with "SIM900A using a "USB to TTL module". Send/recv SMS, make/accept/hang calls functionalities are working as expected ...
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a few weeks ago, my pi 2b failed to detect usb wireless adapter. yesterday, red power indicator flashed sporadically, but booted. today, it failed to boot. checked connections, tried different ...
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My raspberry pi 2 CPU is getting burning hot, even when just starting up. It first wouldn't display aswell, but I rewrote the 32 bit os onto the SD card and now it does display. But it still is ...
Floris's user avatar
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So I have an old Rpi2 B, and I was getting an undervoltage error trying to run OctoPrint on an old bundled PSU. I swapped for a 5V/4A PSU with the same error, I only have the power supply and an ...
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I'm struggling with trying to find any information about text-mode capability in Raspberry Pi. I'm reading about decompression, 3d, etc. fancy features but I'd like to learn about fundamentals: Is ...
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I found out an old Saitek Megamaster MX-530 joystick that I used to play games on old Pentium machine with Win XP. I've tried to used on modern system buying midi/game port converter (25 pin) to USB ...
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I have enabled metadata checksum in my Rpi 2 using this. Is there any way to use this metadata checksum to detect if the sd card is corrupted?
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I have a problem, I'm using a wifi adapter TL-WN725N. On the display when scanning, it says "No Wireless Interfaces Found". I've used the solution from the website: https://gist.github.com/...
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system: raspberry pi 4 model B, 32bit, linux run python Is a dumb question, I was planning to read data from MongoDB to excel' and also read excel toMongoDB'. Overall the .py scrip/code is fine and ...
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The source code I have below works for a two analog voltages(water level detection and temperature sensor). The code is set right now for just these two to run and it does work. If there is a problem ...
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I am a beginner in this field... I was trying to edit files from VS Code and I accidentally deleted all the files from my MELOPERO Cookie RP2040 and I cannot access it anymore... Can anyone help me? ...
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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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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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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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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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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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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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I have a problem with my Raspberry Pi 2 Model B. It has Retropie installed and it used to work fine. Now my display says "no signal". What I tried after some research: Different cables and ...
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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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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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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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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 ...
wkrt's user avatar
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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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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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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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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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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 ...
Baa's user avatar
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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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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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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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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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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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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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