Questions tagged [pi-3]

For questions that apply specifically to the Raspberry Pi 3 and not other/all models.

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1answer
179 views

network manager dbus interface calls for wireless doesnt work on raspbian

I have the following code to retrieve access points information using NetworkManager dbus api: //--------------------------------------------------------------------------------- QDBusInterface ...
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1answer
713 views

Rpi python using L298 motor driver and PCA9685 servo controller to change speed and diretion of robot car

I am unable to understand the code provided with the raspberry pi robo kit I got. I need help in understanding the code as I am new to raspberry. Thanks! #!/usr/bin/python3 # File name : ...
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1answer
155 views

Network boot Raspberry Pi 3 using a USB to ethernet adapter

I have extracted the bootcode.bin, .dat and .elf files from Raspbian and put on a SDCard. I have also compiled u-boot and put u-boot.bin on the SDcard. Now when I power on, u-boot loads fine from the ...
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0answers
243 views

Problem with DIY Smart Glasses Projection module

I am making Smart glasses which will display android app, click pictures, notifications and many more, and which is to be displayed on a small prism I searched a lot of posts online, many of then ...
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1answer
37 views

Raspberry pi connection

I am trying to connect two pis together wireless. I made both pis an access point does that affect them must one of them be a simple pi with the configurations listed or can both be AP and connect to ...
1
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1answer
250 views

Is it safe to use 3V3 on raspberry pi 3B+ to control a 3V DC motor?

I want to connect power to a 3V DC motor straight from 3v3 GPIO. Is it safe or will I brick my Pi 3B+ ?
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0answers
104 views

Getting garbage characters on RPi3 UART console, logs on HDMI are perfect

I have searched a lot on internet and tried all suggested solutions like criss-cross connection, checking loose connections, changing baud_rates and using GND connection for UART, but nothing seems to ...
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1answer
51 views

Raspberry Pi 3 DHT 22 incorrect readings

I have configured the RPi to read value from the DHT 22 sensor. I have used AdafruitDHT library but when I start AdafruitDHT.py script I got totally incorrect value e.g. "Temp=537.7* Humidity=1152.0%" ...
1
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1answer
301 views

Boots to Emergency Console, Unable to check boot partition filesystem

Switched to F2FS for the root partition. Upgraded from stretch to buster by doing an apt full-upgrade. Now the system goes to the emergency console because the filesystem check dependency fails. It ...
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1answer
98 views

Raspberry Pi Connecting to 8 calculator screens

First of all I want to say that I am a complete noob with hardware so sorry if this question is stupid. What I want to do: I am designing a board game, in that game I want to have a raspberry pi ...
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0answers
20 views

My raspbery Pi 3 B would not boot and when it does it freezes

I use 2 amp , 5 volt power adapter in my raspberry pi 3 2015 model and it does not boot , after leaving it for 2 days if I try then it boots up and then freezes and if i turn off the power it does not ...
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0answers
39 views

Most compatible Java on Raspbian

I have run my .jar code on Raspberry Pi 3B - Raspbian Buster with Oracle Java 8 (1.8.0_241). The code will completely run after ~80 seconds. It's read that some java versions/models (like openJdk, ...
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0answers
136 views

Interfacing non bluetooth speaker with Raspberry Pi 3

I want a wired connection between speaker and Raspberry pi 3 Model B. Bluetooth or Wireless connection is not my requirement. Regarding my speaker - it should NOT simply output buzzer sounds but is ...
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0answers
200 views

How can Rpi python read SPI ADNS3080 Optical Mouse Sensor's register values?

I am using ADNS3080 optical flow in raspberry pi 3. I set SPI connection between raspberry and ADNS3080 optical flow. I used spidev library for reading values in python. I want to read delta_x and ...
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0answers
409 views

Getting ftdi_sio ttyUSB0: failed to get modem status: -32

Iam using Raspberry pi 3b along with Xbee and Sixfab 3G/4G base sheild. getting ftdi_sio ttyUSB0: failed to get modem status: -32 usb usb1-port1: disabled by hub (EMI?), re-enabling... and also ...
1
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1answer
54 views

How can Rpi3 communicate with the HART GTD2000 Gas Sensor?

I have a GTD2000-Tx fixed gas sensor with an output of 4-20mA DC. How do I connect it directly to a raspberry pi 3? The power supply is 24 volts and is supplied externally.
3
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1answer
530 views

External HDD disconnects while transferring a large file 100% reproducibility

My setup is: Raspberry Pi Model 3B V1.2 No USB HUB External 3.5 inch HDD: Powered Enclosure: Sabrent USB 2.0/ESATA to 3.5 Inch IDE or SATA/SATA II Aluminum Hard Drive Enclosure Case with Cooling ...
0
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1answer
58 views

why raspberry pi 3 fail to read 1000 p/r rotary encoder while my 8 bit nuvoton micro controller did that properly?

I am using LS s40-6-1000ZT(H) 1000 p/r rotary encoder for my project with raspberry pi 3,but raspberry not working properly as per encoder specification(i.e not counting event properly).What could be ...
2
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0answers
72 views

How to use Raspbee + Raspberry pi (3 B+) + GPRS Shield(SIM7600E-H 4G HAT)

On Raspberry pi, I want to use Raspbee as zigbee controller and SIM7600E-H 4G HAT as GPRS shield for network data https://www.amazon.co.uk/Waveshare-4G-Raspberry-SIM7600E-H-Supports/dp/B07F1NSGQ8/ref=...
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0answers
31 views

Raspbian stretch locking up?

I have been running into an issue for the better part of a year where after a couple of weeks, my RPi3B+ will lock up. Using it for Nextcloud, Apache2, php7.2, etc... Locking up means apache starts ...
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0answers
126 views

MiniDLNA stops scanning after a few files

I used to have this running happily under Raspbian stretch but under Raspbian buster it gives up with no error after a few files. I've checked that the minidlna user has access to all the files. I've ...
1
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1answer
1k views

How do i get dolphin on my raspberry pi 3

I have a raspberry pi 3 with retropie and have been trying to get dolphin (emulator) on it, and have failed numerous times. is there any way to install dolphin on my pi?
1
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1answer
764 views

Setting up Raspberry Pi as an access point for IPv4 and IPv6

I setup my pi using this guide (NAT version): Setting up a Raspberry Pi as an access point - the easy way For IPv4 this worked like a charm. The problem is, that I cannot get IPv6 to work as well. My ...
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0answers
23 views

USB networking between Pi Zero and Pi 3 not RUNNING

I am struggling to get a Pi3 and a Pi Zero to network over USB. I have followed the advice at https://en.iakta.org/progetti/2raspiviausb/ and https://en.iakta.org/progetti/2raspiviausb/ (and elsewhere)...
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1answer
151 views

Esoteric problem: Raspbian Buster vs Ethernet

My RPI3 was working fine with Debian 9 (Raspbian). Today, due to a power outage caused by a storm, SD card stopped booting. I've reinstalled Debian 10 (Raspbian Lite; notice the version change 9 &...
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2answers
224 views

Disable LAN Interface duirng boot

Is there any option to disable LAN and USB interfaces during boot. I found options to disable the interfaces using the Following command. echo 0 | sudo tee /sys/devices/platform/soc/3f980000.usb/...
2
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2answers
357 views

How can I get libserial for Raspbian?

I've got a hard time installing libserial on my Raspi 3B with the recent Raspbian: Both the libserial docs, and the Debian package directory suggest to install the libserial-dev package but a sudo ...
1
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1answer
154 views

Don't know how to connect multiple MCP23017

I need more pins on my raspberry pi 3 so that I can use it to manage the lights in my house. I am going to use relays and MCP23017. I need to know how to use 8 of the MCP23017 on my raspberry pi. If ...
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0answers
974 views

raspberry pi GPIO input value changing randomly

We attached a wire to pin 40 and another one to 3V3 supply. Also attached an LED+resistor between 5 volt and pin number 38. When the wires do not touch each other, the LED constantly emits and all the ...
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2answers
55 views

Pi 3B Boot Problem

I have a 3B that has worked reliably for a year and now will no longer boot (or if it does, is invisible on Ethernet). I have no HDMI compatible devices, so I cannot verify functionality that way. ...
7
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5answers
2k views

RaspberryPi 3 B+: RPi restart whenever I tried to run two webcams simultaneously

I have a very strange problem with my RPi. Whenever I tried to run two webcams simultaneously, RPi restarts itself. A few months back I can run two webcams simultaneously without such a problem (same ...
2
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2answers
160 views

How to read profile of Raspberry Pi 3

I am trying to read some information from Raspberry. This script can be read for all types of Raspberry. I will define them via Raspberry Profile. A Raspberry Profile can be thought of as a template ...
1
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1answer
594 views

VNC enable option locked on raspberry pi

i just bought my Raspberry pi 4 Am trying to figure out SSH and VNC access to my RPI, and something is obviously wrong but I cannot google up the situation. Have tried to follow the instructions on ...
0
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1answer
237 views

RPi with multiple DHT22 sensors stops working after a couple hours

I have a Rpi with 3 DHT22 sensors attached. They share a common VCC/GND and the data lines are plugged into 3 separate GPIOs. I had the system breadboarded for a while and never had issues, but ...
4
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1answer
2k views

How to use Rpi python to control PCM1802 24-bit HiFi stereo ADC and MAX4466 microphone amplifier

I want to get Analog Audio Input using a PCM1802 ADC Module and MAX4466 microphone module using python. It is actually a project for a very basic and introductory course about Arduino and AVR assembly ...
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0answers
20 views

Rasberry Pi - b appliances timer

I am facing some problems in making a relay work with a Raspberry Pi by coding it in Python. Most of the tutorials that I have found on the internet use the Raspberry Pi as an input signal and control ...
0
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0answers
245 views

Raspberry Pi Remote Desktop with Macbook using SSH

I have seen so many tutorials on Youtube showing how to connect Raspberry Ri to Macbook using ssh but when i do try it comes up with an error. i have tried this specific tutorial but still comes up ...
1
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1answer
69 views

Remote Desktop through Reverse Tunnel

I would like to be able to connect to a remote Pi3 in order to view a browser-based config screen for a remote datalogger. The set is as follows Pi3 connected to the mobile phone hotspot network ...
12
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1answer
2k views

Raspberry PI 3B. Wifi and bluetooth shared antenna?

I'm working on a project that involves WiFi and BLE, and for this I would like to use an esp32 due to its lower price, but there will be timing issues since the wifi and Bluetooth antenna are shared. ...
0
votes
1answer
648 views

Rpi Python interfacing RS232 to RS422/485 Converter Problem

I am working with a project where I need to read data from my device(i.e ADAM 4520)using serial to USB converter. 1st, I tested with my PC using hyper terminal and with Raspberry Pi 3 using GtkTerm, ...
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2answers
1k views

The apt-get update does not work on Raspbian

Every time I try to run this command, this is what I get: apt-get update Result: Reading package lists... Done E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied) ...
1
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1answer
269 views

Higher resolution framebuffer modes?

I have a raspberry pi plugged into a 3440x1440 monitor. Without setting any explicit framebuffer_* options in /boot/config.txt, it comes up at 1184x624. The display is crisp and legible but individual ...
1
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1answer
1k views

libEGL warning: DRI2: failed to authenticate

I'm developing an application using qt5.11 on Raspberry Pi 3. My code works on my laptop with ubuntu 18.xx. When I put my code on the RPi, I can compile it with the Makefile (make -j2) but when I want ...
2
votes
2answers
63 views

Is there a fan that will work for my Raspberry Pi 3 & breakout kit?

I have the following: Raspberry Pi 3 model B Breakout board bundle I've had this running for over a year now and right from the start, I had noted that playing some Retro Pie games or watching ...
2
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2answers
451 views

Is there a conflict between raspbian/raspberrypi versions and python versions?

Can some version of python not run on some version of Raspbian? Is there some thing in the architecture of some version of Raspberry Pi that could make them incompatible with some versions of python?
2
votes
1answer
72 views

Moving to a new house

At home i have a raspberry pi as a webserver for my personal project and in the next couple of months i'm moving with my parents to a new house. What are the things i should check before moving the ...
3
votes
1answer
57 views

Camera NoiIR camera wont work while my touchscreen is plugged in

I've got a raspberry pi V3. A touchscreen that connects to the DSI port and a Pi NoIR camera module and running the latest lite image. The touchscreen is a non-pi brand screen i found on amazon. It's ...
1
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0answers
969 views

How to encrypt whole file system of Raspbian Buster

We have done a project with Raspberry Pi 3B. I have read something about filesystem encryption of the Raspberry Pi/Raspbian. Also, I read this question which answered years ago (too old!). I didn't ...
0
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0answers
117 views

Brightness issue in Waveshare 10.1 inch Capacitive Touch Screen

I have 10.1 inch Touch screen displays (10.1inch HDMI LCD (B) 1280×800, IPS) https://www.waveshare.com/10.1inch-hdmi-lcd-b-with-case.htm I am using Raspberry Pi 3 Model B with Android Things OS and ...
1
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1answer
578 views

Where can I connect an antenna to my 433 MHz receiver chip?

I have these 433Mhz chips. I already have an antenna on the transmitter chip and it works great. The receiver works too, but you have to be really close to it for it to pick up the signal. I would ...

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