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Re configuring GPIO pins for SPI protocol

GPIO pins 19,21,23,24,26,35,38,40 are dedicated for SPI protocol. Is it possible to use other GPIO pins for SPI? If yes, how do we do it?
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0answers
12 views

How to use bash script(s) to easily switch RPi between onboard hotspot and external WiFi network connection?

I've created a web based UI for an RPi based IoT project with a network settings page. It allows users to specify WiFi settings and switch between an internal hotspot and an external WiFi network. ...
-1
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0answers
7 views

RPi 2: Could not communicate with wpa-supplicant

Like the title, I updated the Raspbian from Jessie to Buster, and when I restarted my Pi 2 Model B, wlan0 suddenly not associated, I noticed that could be my Wifi dongle problem. But when I get to ...
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0answers
6 views

Printer keeps printing the same document

I have an HP OfficeJet 8710 printer installed on my Raspberry Pi 4b on Ubuntu 19.10.1. Documents sent to the printer keep reprinting until I cancel them with cups on localhost:631. The same networked ...
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0answers
18 views

Raspberry Pi 4 NAS setup with RAID0 (for Remote Access)

I'm trying to setup a NAS server using my RaspberryPi 4 with two 2TB HDD's in a RAID0 configuration. I would like to have remote access from various other devices (Android phone, linux desktop, ...
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0answers
11 views

How to solve the DDNS exposure router management web dashboard issue?

Using the duck DNS. I did the port forwarding, everything works well. 8888 => 192.168.10.2:80 One thing I found is that each time I visit the ddns url, it goes to my router management to ask ...
1
vote
3answers
21 views

Static IP DHCP server on eth0 erratic (stops working) and kills wifi. What's wrong?

On a Raspberry Pi 3B+ I want to have a all the functionality services (ssh, vnc, dhcp) on a wired intranet on eth0 and the Internet wirelessly on wlan0. I have installed the servers and under some ...
1
vote
1answer
17 views

Video Streaming from raspberry zero to an external server

I'm aware of streaming live video using on the RaspberryPi itself as a server. But is there a way to send the video from the raspicam to an external web-streamer so that if I have multiple people ...
2
votes
1answer
18 views

remote connecting to laptop

I have connected my raspberry pi model 3 B to my laptop remotely using SSH. I am able to connect to the terminal, but when im trying to view using VNC viewer all I am getting is a gray screen.
2
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0answers
20 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 ...
2
votes
2answers
13 views

SPI Not working when chip select is connected to ground, works fine when connected to CE 0,1 or 2

I am working on MFRC522 sensors. However I need more than 3 SPI Devices. The 3 works fine except when I want to connect chip select to GPIO, It does not work. I tried a single spi device by connecting ...
-1
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0answers
23 views

How accurate is a MPU9250 IMU for direction and velocity measurement?

I'm currently experimenting with a MPU9250 Inertial Measurement Unit (gyroscope, magnetometer & accelerometer) mounted on a three wheeled car chassis, with two motors. I have mounted the MPU on a ...
2
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0answers
18 views

USB ports heavily lag or disconnect completely

We have a Raspberry Pi 4B running Raspbian as a lightweight management console. (A cost effective way of managing network devices over RS232 and such.) I've noticed some problems with the USB ...
2
votes
1answer
28 views

Reading Frequencies with Python

hello ladies and gents. your knowledge helped me a lot until now but now i have a question. i want to read out the frequency of a 3.3V squarewave. (The unit i want to readout is a capacitive ...
0
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0answers
27 views

How to continuously check Pin status in infinite while loop

I am working with Raspberry Pi 4 and using python for some project. The sample code is as below: while True: if( GPIO.input(a)==GPIO.LOW): if __name == '__main__': try: ...
-2
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0answers
33 views

SPI connection Between RaspberryPi and MAX4896 8-channel relay and load driver using Python

I have an automation project which I am currently working on and that can be summarized as the title says: Connecting a MAX4896 8-channel relay to the RaspberryPi 3B+ through SPI and using Python. ...
2
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0answers
10 views

Error opening InputStream USB Microphone and Raspberry PI3B+

I am trying to use a USB microphone with python sound device and raspberry pi3B+. When I execute the script in the console typing $ python3 sound.py it runs and records all ok. But when I try to ...
0
votes
1answer
33 views

How to use Raspberry PI4 as a security device for the network?

How Can I use Raspberry Pi 4 as a antivirus or a security device in a Network? I am trying to make the raspberry pi become a security device example below. ---(Internet)----(PI 4)-----(Local-PC) ...
0
votes
1answer
28 views

Raspberry Pi 4 network boot without tftp?

we want to boot the PI 4 from the network without an sd card. We already have an old system that works on the old pis with a minimal image that gets from the DHCP server the boot server. Is something ...
0
votes
1answer
24 views

MS SQL 2019 on RPi4 Ubuntu 18.04

I am trying to install SQL Server 2019 on a Raspberry Pi 4 running Ubuntu 18.04. I am trying to follow the installation guide from Microsoft: https://docs.microsoft.com/en-us/sql/linux/quickstart-...
1
vote
0answers
11 views

Turn off HDMI on Musl Aarch64 OS

Objective I want to turn off HDMI on my Raspberry Pi 3 Model B. The binaries for Raspbian does not work on my OS because it is linked to a different standard c library. Before I go down the rabbit ...
0
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0answers
10 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 ...
1
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0answers
20 views

CEC client Hybrid help

I hope someone can help me. I've got a pulse-eight cec adapterand my TV is my main monitor for PC. I made 5 simple stand-alone scripts linked to F8 and up to F12 on the keyboard. They turn tv on-off ...
0
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0answers
11 views

Erro downloading kinetic ROS on RPi 4

I am following the guide provided on github to downloading raspbian and ros. I followed the steps mentioned here: http://wiki.ros.org/ROSberryPi/Installing%20ROS%20Kinetic%20on%20the%20Raspberry%20Pi ...
3
votes
1answer
24 views

Web Browser keywords to automaticly redirect to local websites?

I have set up a website on my raspberry pi for our local network. My parents are gonna be using it too so I want when they type for example "picam" in the browser that they get directed to the IP ...
0
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0answers
28 views

NFC tags in raspberry pi

I'm working on a NFC study. My development environment is as follows. raspberry pi 3 B PN532 NFC : https://www.sunfounder.com/pn532-nfc-module-for-raspberry-pi.html Android Phone (app name :nfc-tools)...
1
vote
1answer
302 views

Dual boot RetroPie and Windows XP on Raspberry Pi 3B

I have a raspberry pi 3 model b, and I currently use it for RetroPie, and I know there's a thing that lets me dual boot on it. But my question is, would my pi handle WinXP as an emergency back-up ...
1
vote
0answers
21 views

Headless Shutdown of Raspberry Pi using Adafruit-GPIO-Halt

I am new to Raspberry Pi and am trying to use the headless shutdown module provided by Adafruit. I downloaded the script of Adafruit-GPIO-Halt to my Raspberry Pi, installed it to the /usr/local/bin/...
1
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0answers
26 views

dotnet Core 3.1.1 on Raspbian - but can't find runtimepack

I'm at wits' end, trying to figure out why my HelloWorld console app doesn't work. my Raspberry is a B3 running Raspbian Buster Lite. dotnet --info shows the following: I followed the instructions ...
1
vote
1answer
51 views

How do I incorporate a button for pedestrian crossing when making traffic lights?

Here's a link to what I have been trying a accomplish: https://projects.raspberrypi.org/en/projects/physical-computing/9 Near the bottom of the page it says, "Try adding the button for a pedestrian ...
1
vote
0answers
9 views

Miracast receiver with touch input return

TLDR: Is there a software developed yet to act as a Miracast reciever that will return touch responces? I have a fleet of touch screens that use HDMI and USB cables into staff laptops for lessons ...
0
votes
1answer
21 views

Can I power up the PI with the LDO MIC29300

I am using the MIC29300 https://www.microchip.com/wwwproducts/en/MIC29300 in my circuit to generate a 5V signal to my ADC (works fine now) Would it be possible to grab that 5V line and have it ...
0
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0answers
23 views

How to swap displaying on Adafruit TFT back to HDMI

I’m new here. Recently got the adafruit tft display, tried it out but now want to swap back to HDMI output to display on monitor as before. Original instructions : https://learn.adafruit.com/adafruit-...
-1
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0answers
20 views

Why every texts are disapperaing while I am selecting it?

Something like this , is happening. How should I fix this problem?
1
vote
1answer
31 views

captive portal with apache on a raspberry pi

I'm trying to make a captive portal with apache as a server and a raspberry pi on AP mode. I have some trouble trying to make the captive portal splash, I tried all tutorials on the internet and I can'...
0
votes
2answers
24 views

How to check if DHT11 sensor is working

I have RPI Zero with DHT11 connected as recommended (diagram) and I was reading data from it with ~90 % success rate every 5 minutes using the old Adafruit library. But today morning it stopped ...
0
votes
1answer
23 views

PiHole in docker no webserver

I'm trying to get PiHole to run in a docker on my raspberry pi 4. For some reason I'm unable to solve an issue with lighttpd. docker-compose.yaml: pihole: container_name: pihole image: ...
0
votes
0answers
24 views

SIM800C GSM Module with USB to TTL Serial CH340 Module

I'm planning to use this instead of connecting the pins of the GSM module to the pins of the RPi3B. Since the voltage for the TxD and RxD pins of the SIM800C is 5V and the TxD and RxD pins of the ...
0
votes
0answers
14 views

Initiating a (or multiple) ADC read with SPI during Ton of a PWM signal generated by the RPi

My goal is to create a signal to my circuit that can be anywhere between 1-1khz, with a wide range of duty cycles. I have achieved this, where I am using the following to generate a PWM signal (this ...
1
vote
0answers
26 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 ...
0
votes
0answers
31 views

How does the raspberry shake software work?

Correct me if I'm wrong. I just need an sd card with Raspbian installed and the software for raspberry shake. Because I want to use my own sd card, not the one Raspberry Shake came with. But I'm ...
1
vote
1answer
29 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.
1
vote
0answers
36 views

what's the best method to detect lane lines using raspberry pi?

i have a question about a project that im working on. im making a lane keeping assistant on a self driving car (im using a toy battery car that a kid can ride on) which requires me to detect the lane ...
1
vote
0answers
24 views

How do you share the wifi connection of a raspberry pi over ethernet

Update: after removing "pihole" software which was controlling dns, computer is working. I have to check if the script from Mr. Agarwal works now. I followed instructions from elsewhere on this site ...
0
votes
1answer
26 views

Chromium telling me to reinstall because I'm missing features?

I'm running Raspbian Buster on a P1 4B and just updated everything through the terminal (sudo apt-get update). Now Chromium is displaying a pop up that says I need to reinstall because I'm missing ...
1
vote
1answer
41 views

How can Rpi3+ python use four GPIO pins to drive the unipolar stepping motor 28byj48?

I am working through the 'Ultimate Starter Kit" for my Raspberry Pi 3+. In Chapter 16 the tutorial shows how to work with a stepper motor. Note: The program works per the tutorial - I just cannot ...
0
votes
1answer
13 views

How to install a Kuman 7" Touchscreen with Raspberry Pi

New to Raspberry and just experimenting for now. I bought a Kuman 7" touchscreen and got the display to work, but I am having trouble installing the matchbox touchscreen software. I moved the ...
1
vote
1answer
33 views

Change Splash on Pi 4

Halfterm is upon us, I've got a RP4 for my daughter and want to change the splash screen for her, but I've never used Linux based systems before and so don't know where to start. I've already got the ...
3
votes
2answers
33 views

Multiple Wifi networks - can't connect with VNC

I'm using a Raspberry Pi 2 Model B with a wireless USB adapter, Raspbian jessie. Until today I only had the raspy connected to my home network, everything was fine. Now I have the necessity to bring ...
0
votes
1answer
30 views

My Pi 3B+ did not start out of box

First-time user of Pi 3B+ here; just bought from Amazon. I used a new HDMI-to-VGA adapter cable and followed the instructions enclosed in the box, applying power last of all from the official mains ...

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