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Questions tagged [pi-3]

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

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6 views

x.overrideredirect not working on raspberry pi

On my pi, I was trying to make a simple clock in tkinter (which works.) But, I can't use overrideredirect. The whole program works fine on windows. Any help is greatly appreciated!
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0answers
42 views

Read registers of Power Meter w/ RPi using Pymodbus TCP

I'm trying to monitor the power usage of multiple devices and store that data in a database using Python. I am connecting my RPi 3 to the power meter via an Ethernet cable and using Modbus TCP. To use ...
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1answer
41 views

Raspberry Not Powering Up

Hope you are all doing fine !! Actually I'm just a beginner with raspberry Pi ... I started doing python coding on it a few days ago. But now when I'm connecting my charger to it ,It won't start. ...
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3answers
72 views

How does the relay work?

I have a SRD-05VDC-SL-C relay (that is, a 5V controlled relay). Inputs, on relay, are VCC,IN and GND. Now, I wanted to try if it is working. So I plugged RPi's 5V to VCC, and GND to GND. Relay's ...
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1answer
41 views

How to toggle a 1 Channel Relay 5V

So. I have a 1 Channel 5V relay from a starter kit and I cant turn it on or off. I saw a bunch of tutorials but in every one the labels on the relay are such as VCC, GND and so on. My relay its ...
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0answers
28 views

No static IP until a device is connected on Raspberry Pi3 jessie?

I am using the jessie version 2017-07-05 on Rpi3. I have set the a static IP address for eth0 interface using dhcpcd.conf as shown below. interface eth0 static ip_address=192.168.0.10/24 static ...
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0answers
60 views

Connecting a new Bluetooth device without monitor?

We are trying to connect a Bluetooth device without a passkey and trusting default yes in Python. I am running a headless Raspberry PI 3, and I want it to automatically accept pairings from any ...
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2answers
56 views

Tinkering with environment variables

i want to run my pi headless, and only wire up some switches via gpio to operate it. i want it to monitor 3 switches, and tell if theyre high or low, and react accordingly. it should be launched every ...
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1answer
21 views

Problem connection with ppp

i use wvdial for configurate ppp connection via PCIe (LE910C1-EU). This is my configuration: Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Init3 = AT+CGDCONT=5,"IP","wireless.twilio....
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0answers
17 views

Install and use windows driver for .NET application in Raspbian

I have a thermal camera which allows to develop software in C# using .NET (the old one, not the new .NET core). This is the SDK: https://flir.custhelp.com/app/answers/detail/a_id/1043/related/1 This ...
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1answer
44 views

What is the highest amount of relays Pi 3 can handle?

I'm looking to do something interesting with 16-20 laptop and computer fans. I was wondering if this was possible to just connect them to a large battery and then use a trigger to control some power ...
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0answers
23 views

Raspberry Pi + android NFC

Is it possible to add NFC to Android install on Raspberry pi 3? If yes please explain how can I achieve this. I would like to use Google pay on RP3. I didn't buy the product yet, but as far I know ...
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0answers
35 views

Raspberry Pi 3 Model B - Windows IOT - UWP C++ - Servo control?

So currently, I have already developed a uwp application in Visual C++. I ordered a raspberry pi 3 model b from Amazon and its expected to arrive on Wednesday. In my program, I have a button, when I ...
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0answers
39 views

Pi Camera choppy video/skipped frames

I'm using the Pi camera to record 30 seconds of footage, triggered by an IR break beam sensor. This is running on a Pi 3 B+. I've soldered in all the wiring using an Adafruit Perma-Proto Pi Hat. My ...
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1answer
31 views

Raspberry Pi and localhost Connection

So I'm currently doing a project using Beacon and Raspberry Pi. The raspberry pi collect the UUID and RSSI of the Beacon and send it using socket.io to the server ( localhost-my computer) to save it ...
4
votes
1answer
140 views

Unable to Reconnect WiFi on Pi 3 after Connection Drop

Question What is the current proper way to force reconnection to a WiFi access point? (Or even better: automatically reconnect after the connection is dropped?) The only way to reconnect that has ...
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0answers
59 views

How to connect to multiple Bluetooth speakers?

Can I connect 3 speakers to the PI and listen to them at the same time? The distance will be less then 5 meters so that should not be a problem. I'm using a PI3 with Raspbian Stretch.
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0answers
19 views

Sync RGB strip lights with MIDI clock pulse input

I would like to create a lightshow of sorts, for my Keyboard, that can output a midi clock. I have a strip of WS2801 and I am looking for a way to sync colour changes/fades/flashes etc to the beat of ...
0
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1answer
27 views

How to get mobile location with pi

Is it possible to get mobile locations with the help of pi. Distance matters here for me. All i want is to get my team's mobile's live location from portable pi device. Thanks
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0answers
67 views

What version of Alpine Linux OS to install on Raspberry Pi 3?

I want to install Alpine Linux on Raspberry Pi 3. There are two versions of armhf and aarch64 on the download page. Which one should I choose?
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0answers
29 views

Digital signage [ Pi and Android application ]

Recently i was working on Digital Signage and i want to make a portable device [Pi] and i want to manage it from mobile application. is there any plugin or code that i can embed in android java ...
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0answers
37 views

Unable to access internet in PC when connected to Pi(ppp0) via Ethernet

I am using openhabian. I have managed to get the Pi connected to the internet via the Quectel UC20-G modem after which I get a new interface called ppp0 with IP address 49.225.37.106 as shown below. ...
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2answers
84 views

Unable to flash Android of things on SD card properly

I have been trying to install Android of things on Raspberry Pi 3 B+ but cannot get it working. I downloaded latest android of things setup utility, ran it on windows 10. I have successfully flashed ...
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0answers
25 views

Database for Raspberry pi [closed]

I'm working on Home Automation project using Raspberry pi and i'm making android app for controlling home appliances like fan and bulb. I also want to make website for admin to see status of ...
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0answers
18 views

How do i turn my raspberry pi to a BLE peripherial to connect with an iOS device and query it for data

I have installed the latest of bluez (bluez-5.50), tried different suggestions from folks and nothing works, I can't find my raspberry pi on my IOS device using different BLE scanner apps. Can someone ...
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2answers
34 views

Ethernet for SSH via Offline Router, WiFi Chip for Internet

So, here’s how it goes. I have an old Linksys router which I have my raspberry pi connected to via Ethernet. I SSH to it via my laptop or phone by connecting to my router via WiFi. I want to be able ...
0
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0answers
48 views

Is it possible to have both hidraw0 and hidg0?

I would like to know if we can have both hidraw0 and hidg0 at the same time? Detailed description :- I have a barcode scanner, raspberry pi zero W, zero4u hub. Barcode scanner is connected to ...
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1answer
26 views

Using Earphones/Headphones with mic to give voice commands in DIY alexa on raspberryPi zero/3b/3b+

Can I use Using Earphones/Headphones with a mic to give voice commands in DIY Alexa on raspberryPi zero/3b/3b+ by connecting the 3.5mm male jack to the board via a USB type c/ micro USB adapter as the ...
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1answer
52 views

How can I determine which model Raspberry Pi I am running? [duplicate]

I have several RPi's on my network. How do I figure out what model any given RPi is?
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1answer
24 views

Control two RGB LED Strips from Raspberry pi

I've connected two rgb strips(WS2812B) to raspberry pi. Each strip consists of 60 LEDs. The first strip data line is connected to GPIO pin number 18 & Second strip data line is connected to GPIO ...
2
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1answer
46 views

Raspberry PI Laptop Ethernet Connectivity Issue

I setup my headless Raspberry PI and called it Optimus. I connect my Windows 10 desktop machine to the Raspberry PI via an ethernet cable. If I ping optimus.local I get a response and can SSH into it -...
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0answers
44 views

All files lost during long shelf time

i was using my raspberry pi 3 over ssh and doing a bunch of scripts, cron jobs, etc. then i stopped for a bit and shifted my focus elsewhere and my pi remained unplugged on my desk for a few months. ...
1
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0answers
26 views

GPIO in /sys/class/leds/

I am doing a project with Raspberry Pi and OpenWrt. I need to attach indicator LEDs. Basically, I need to modify the DTS for bcm2710 and add additional GPIOs in the led section such that it gets ...
0
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0answers
28 views

Cannot connect to GSM 900A Module

I am working on a project that uses SMS to push data to a blockchain. I bought a GSM 900A Module and connected it to Raspberry Pi 3b+. The connections are as shown in this picture : https://i.stack....
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2answers
36 views

i2cdetect detects device - Pi can't access / find it

Currently I'm working with a gyro-sensor and need to use i2c in order to use it. Using a Pi 3 B (os:NOOBS) on kernel: Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/...
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0answers
15 views

Omxplayer how to stream video to external react frontend

So the videos are on the pi, we have a react frontend on my local machine connecting to the flask backend which is on the pi. I need a way to get the video from the pi displaying on the website ...
0
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1answer
50 views

anode RGB LED to raspberry Pi

I have wired up a common anode rgb led to my raspberry Pi. I dont understand why its not lighting up. My setup is this: 5v to rgb anode rgb to pi pins ( 5,6,26) My code is const Gpio = require('...
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2answers
72 views

How to connect to the internet using an Ethernet cable

I have an Ethernet cable which I use to connect to the internet on a desktop Windows machine. These are the IP settings I gave the Windows machine: IP adr. 172.18.14.19 subnet mask 255.255....
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0answers
38 views

Raspberry Pi's Ethernet cable port suddenly stopped working after connecting 4-channel Relay board

I am having trouble with my Raspberry Pi's Ethernet and USB ports. I was using Ethernet port usually for my experiments with pi. But I tried to connect 4-channel relay board to my pi. According to my ...
0
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1answer
36 views

Python RPIO.ChangeDutyCycle() Equivalent in WiringPi (C)

I'm currently developing an application with the WiringPi library. I have implemented a prototype in Python, and I'm currently trying to reproduce the same behaviour in C++. However, I ran into some ...
1
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0answers
30 views

Communication from Raspberry Pi 3B to Pi zero 1.3 via USB

I have a Raspberry Pi 3B that I need to use to communicate to a Pi Zero 1.3. I am able to SSH into the Pi 3B from my computer via ethernet. I can also SSH into the Pi Zero from my computer via USB. ...
1
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1answer
1k views

Why do LED lights need resistors? [duplicate]

Can someone explain why LED lights need resistors when connecting to pi. The raspberry Pi is either providing 3.3v or 5v depending on if it's connected to power pins or gpio pins. Your set up would ...
0
votes
4answers
95 views

How do I control a headless Raspberry Pi 3 b+ via SSH from Ubuntu 18.04 LTS without a router?

There are many variations of this question that I've found on this site, but so far I haven't found an answer that solves my exact use case. Currently, I am able to SSH into my Raspberry Pi 3 b+ (...
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0answers
16 views

Lagging/freezing

We are receiving signals from hardware components that we need to measure very precisely down to the millisecond. It is all working very well until a minor freeze occurs roughly about once every 3 to ...
0
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1answer
94 views

Import Error: No module named watson_developer_cloud

I'm trying to create a program that will send an image to the IBM Watson studio and use that to perform a computer vision image recognition analysis. Anyways, when I try to run the program, it only ...
0
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1answer
36 views

Raspberry Pi Camera Taking Takes Blurry Pictures

I just got a camera for my raspberry pi 3, more specifically the Arducam 5 Megapixels 1080p Sensor (https://www.amazon.com/gp/product/B012V1HEP4/ref=ppx_yo_dt_b_asin_title_o01__o00_s00?ie=UTF8&psc=...
1
vote
1answer
43 views

Radio Transmission

Yes, I pretty much a noob, but I was wondering if there is a way to program the Raspberry Pi in Assembly Code to transmit data via radio frequencies (like remote control) between itself and another ...
0
votes
1answer
112 views

Servo robot with keyboard control

I am currently creating a design project that involves controlling several servo motors for a raspberry pi 3. I want to use a keyboard to control the direction of the motors, and I am using curses to ...
2
votes
1answer
47 views

Generating fast rise PWM signals using software GPIO

I want to use my Raspberry Pi 3 Model B (rev 1.2) as a source for fast rise PWM signal generation. The idea is to utilize RPi as part of a cheap TDR (time-domain reflectometry) setup. For anyone ...
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0answers
16 views

Raspberry Pi 3 B won't boot up again, even after (supposedly) clean shutdown

everyone. So I am very new to Raspberry pi. I just installed Raspbian yesterday sing NOOBS, and it was successfully installed. I played around with it after install and even rebooted it (using the ...