All Questions

0
votes
0answers
2 views

Cannot SSH to EC2 whilst using iPhone hotspot

My Rpi needs to connect to an EC2 instance. This works fine when the Pi is connected to internet using ethernet or my home wi-fi, but stops working when connected via an iPhone hotspot. I'm using a ...
0
votes
0answers
11 views

How to open port without setting router in Raspberry Pi 3 B+? Port 25565

I've got a problem. I'm making server for Minecraft server in Raspberry Pi 3 B+ and I want to open port 25565. I can't do it. I looked up many forums and videos and all people make this with setting ...
3
votes
1answer
62 views

Need help running games on a pi

Looking to get a raspberry pi to make a portable games console like the switch for my family. It needs to be portable which is why I am using a pi, but I want to run games that are downloaded onto the ...
0
votes
1answer
11 views

Couldn't get Composite Video Output on Raspberry Pi 3B

I am trying to get composite video output from my raspberry pi to feed into my old CRT TV. I tried multiple times but without success. I bought an 4 pole 3.5mm RCA cable which was not according to the ...
0
votes
0answers
6 views

Catching Printer Errors in CUPS

Hello RaspberryCommunity, Well I am new to raspberry pi, and I would like to ask if how can we[b] catch error in the printer.[/b] Like paper jam or no paper available in the printer. I am now ...
0
votes
0answers
11 views

How to setup Mutt or ssmtp with outbox function

How to setup email with outbox. If in case internet connection is not available the unsent email will be in outbox and once internet is available it will sent all unsent email in outbox accordingly?
0
votes
0answers
12 views

Interrupt in Raspberry pi using MATLAB Programming toolbox for RPi

Is there a way to use the external interrupt feature of Raspberry Pi using MATLAB? The MATLAB only supports read and write to I/O's. I am using Raspberry Pi model 3 B. I am trying to execute a routine ...
0
votes
1answer
14 views

interface bmc280 & tsl2561 together

I am trying to interface bmc280 & tsl2561 together with Pi Zero. I have connected bmc280 to Pi Zero and able to read the data over i2c. Now I want to add tsl2561 t read LUX. Is it possible ?
0
votes
0answers
18 views

irrigation system PI projects

anyone can recommend me a good RPI project for an irrigation system maybe using something simple as node red? want to be able to control and sense CO2 Temp Humdity water flow water temp Fans ...
0
votes
1answer
29 views

Not able to connect over ssh with my pi

My only possibility to connect with my raspberry is over ssh. I have crated a file named 'ssh' on my card as described in this post https://hackernoon.com/raspberry-pi-headless-install-462ccabd75d0 ...
0
votes
1answer
23 views

Use SD Card Copier to create backup to USB, then copy back to SD card?

I'm trying to make a backup of my raspberry pi (raspbian) so I can come back to this backup just in case something bad happens. The problem is that I only have 1 SD card. I know that you can use SD ...
0
votes
0answers
36 views

Install LCD display on Raspberry Pi without internet?

I want to setup a LCD display on my Raspberry Pi, but I have no internet on it. the instruction says running this in cmd is needed: sudo REPO_URI=https://github.com/notro/rpi-firmware rpi-update My ...
1
vote
1answer
65 views

Headless pi zero HID keyboard

I am trying to get my pi zero to act as a HID USB keyboard when plugged in to a computer, following this guide. I finished the configuration, and I get to the "Keyboard / Mouse / Joystick (HID)" ...
-5
votes
1answer
36 views

Issues with PI and faster VC4 alternatives

I am aware that there has been alot of questions about using dedicated Nvidia or AMD GPUs with the Pi (I have asked a few of them). But ARM (mali core ) and Vivante among other companies appear to ...
0
votes
0answers
15 views

why rsync speed slows down as the transfer progresses?

whenever I am doing rsync of large files , I noticed the rate of transfer goes down as it reaches transfer completion. why does it happen ? when I start it always start with 10Mb/s.
1
vote
1answer
29 views

bootcode.bin RPi 3

I've been reading this document: https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/bootflow.md About the boot process of the Raspberry Pi. I want to make a simple "Hello, ...
1
vote
1answer
27 views

Cannot find the drive with NOOBS files when trying to boot Pi 3 B+

Tried using this guide to install NOOBS on a micro SD card. After formatting the card with GParted to fat32 format, I simply unzipped the files from this page (NOOBS_v3_0_0.zip) and dragged all the ...
0
votes
1answer
22 views

OSError: [Errno 121] Remote I/O error or pigpio.error: 'I2C read failed' on MPU6050

So I use MPU6050 to get acceleration from stepper motor linear rail movement(steper motor working in thread, I use pigpio for the motor) by make the MPU6050 can work on threading and it can show data ...
1
vote
0answers
13 views

Rpi3b+ to Rpi3b+ jtag/SWD connection and OpenOCD

I'd like to hook together two Raspberry pi 3b+ to use jtag/SWD with OpenOCD. I learned it can be done, but implementing it has proven challenging. I have two questions: How to connect the Rpi's. If I'...
1
vote
2answers
30 views

Swap Memory Usage

After running the command top on Raspbian, I get the following result: KiB Mem : 948956 total, 249788 free, 549408 used, 149760 buff/cache KiB Swap: 102396 total, 3836 free, ...
0
votes
0answers
14 views

Air flow sensor for raspberry pi [on hold]

I'm looking for a relatively cheap flow-through air velocity/volume flow rate sensor that will work with raspberry pi and very small pressure difference (<2psi). It doesn't need to be too accurate ...
0
votes
0answers
22 views

How to wake PC from suspend — via USB with Pi-0 in Gadget mode?

I have a Raspberry Pi Zero and I am attempting to use it to wake up a computer. Wake-on-LAN is not an option in this case. I have configured the Pi to function as a USB keyboard in gadget mode by ...
0
votes
1answer
25 views

GPIO pin remains high

Upon running the following script my relay stays open when the GPIO pin is set to output. In all my attempts. there has not been any way for me to alter this behaviour. The code I've ran: import ...
-1
votes
1answer
31 views

Raspbian OS in Windows7

I want to practice Raspbian OS in my windows system(Windows 7 64-bit). Please suggest best and safe application
0
votes
1answer
25 views

Telugu language in raspbian

I installed ibus(m17n) and added a telugu input method. I also installed telugu font package(fonts-telu). But I am not able to use telugu(after selecting it in the task bar icon) input method in ...
0
votes
1answer
21 views

run vlc in command line

So I have a Raspberry Pi 3+ running OctoPrint. I also have an HDMI IP camera attached to my 3D printer. Because the stream for the camera is not compatible, I have another server running the VLC ...
0
votes
0answers
11 views

Unable to establish second Raspberry Pi [WIFI Direct] to a device

I have 2 Raspberry Pi and an Android Tablet and the Tablet is supposed to be controlling the Raspberry Pi via the webserver from the Pi. The Android Tablet has a Wifi Direct application and I was able ...
0
votes
1answer
30 views

Is my router not port forwarding? or is it my ISP?

I know, many a port forwarding question has been asked before... But I've been struggling with my router for days now, wasting too many hours, reading everything I can find online and failing to make ...
0
votes
0answers
28 views

Ssh not working on different LAN network. Connection refused

I am succesfully able to connect to my raspberry running raspbian stretch lite via ssh on my home network. When i move my raspberry to another home network i keep receiving "connection refused". ...
3
votes
1answer
22 views

What are the functions of the test pads on the Pi 3B/3B+?

The various models of the Raspberry Pi comprise numerous test pads (testing pins). Many of these pads however are not mentioned or properly labelled in the official reduced schematics the Raspberry Pi ...
0
votes
1answer
21 views

Can't see files on a mounted NAS drive

In my /etc/fstab, I have this: //nus2000/z /mnt/nus2000 cifs username=z,password=z,workgroup=MSHOME,users,auto,user_xattr,nofail,vers=1.0 0 0 Then I do: sudo mount -a Then I type 'mount' and see ...
0
votes
1answer
17 views

Sending and Receiving data with RPi wifi Access Point

So, I have a project where I need to send and receive data from multiple devices (phones and a laptop) over a wifi network created by my raspberry pi. I have successfully created the wifi network by ...
1
vote
0answers
17 views

Raspberry Pi not seeing multicast traffic?

I have a setup in which one Raspberry Pi 3 is publishing ethernet multicast traffic and another Raspberry Pi acting as a subscriber. Both are on a wired connection, plugged into the same switch and ...
0
votes
0answers
18 views

Transfer sound from raspberry pi to another machine (running Ubuntu) [on hold]

I would like to transfer sound from my pi to another machine. For instance, if I was remotely logged in to my pi and executed an(y) application which produced sound I would like this sound to be ...
0
votes
0answers
21 views

How to hold last frame in omxplayer

i'd like to stop the omxplayer exactly at the last frame of each video. Is this possible?
3
votes
1answer
61 views

Boot from USB, if no then SD card

What I want to do is something really simple just like in an ordinary computer you can set the boot order, I'd like to do this on a raspberry pi, if there is a bootable usb media use that, if not fall ...
0
votes
0answers
14 views

pymodbus error: [Input/Output] No response received from the remote unit/Unable to decode response

I've been having connection errors on my Raspberry Pi 3B using pymodbus. Designed a board using MAX14854G as the RS-485 transceiver that is connected to the RPI3's UART pins (8 & 10). Currently ...
1
vote
1answer
29 views

How to synchronize GPIO state between two Raspberry over Internet?

What is the simplest way to synchronize GPIO state (states are: 1 or 0) between two Raspberry devices connected via Internet ? What I need is immediately change GPIO state on Raspberry 1 if Raspberry ...
0
votes
3answers
47 views

Relay board failing when connected to RPi3 5V pins

I'm using my pi to power several relays. A total of ~20 relays (a 8-relay board and three 4-relay boards) I'm also running home-assistant Yesterday i noticed that when i try to power them all up, ...
2
votes
1answer
26 views

ntp doesn't work in raspberry pi

the problem is my raspberry pi 3 doesn't show the correct date and time.i edit this file: sudo nano /etc/ntp.conf with correct server addresses and i try this commands : sudo /etc/init.d/ntp stop ...
0
votes
0answers
27 views

What is the maximum distance over which two raspberry pi can communicate via WiFi? [on hold]

I want to know whether two raspberry pi can communicate if they separated by 500 meter.
-1
votes
0answers
18 views

Disconnect and reconnect a servo while code remains intact [on hold]

Can i set up a servo in a specific way so i can use it, remove it, then connect it again through wires. Will this mess up codes? Ex: making an opening flap for an r2d2. Can i remove a set servo from ...
0
votes
0answers
14 views

Problem autostarting pigpiod

On my Pi3B+ I had pigpiod configured to run on boot and I can successfully run compiled c programs; specifically DHTXXD.c which contains:- /* DHTXXD.c 2016-02-16 Public Domain */ #include <stdio....
0
votes
0answers
15 views

2 Wireless network cards, 1 wireless access point, 1 ad-hoc mesh

I am working on a project where I have 2 wireless network cards on a pi 3B+. The internal wlan0 and an external wlan1. I need to have wlan0 work as an access point, and wlan1 to work as part of a ...
1
vote
1answer
43 views

Heartbeat on GPIO via config.txt

I want to have an indicator that the Pi is running an wired a LED to GPIO 21 (with a resistor). When manually turning on the LED via /sys/class/gpio the LED turns on. Unfortunately, it does not give ...
1
vote
2answers
362 views

MCP3008 analogue digital converter… how can I use it for the complete opposite of what it was made for?

I have set up an mcp3008 chip and a slide pot on my pi because I wanted a nice old fashioned volume control, and all of that seems to working fine and I am quite happy with it. Now I have 7 ...
0
votes
1answer
12 views

bad revision on bash_completion.sh file, now I can't boot

younghoons-MacBook-Pro:~ younghoonkim$ ssh pi@192.168.10.110 pi@192.168.10.110's password: Linux raspberrypi 4.14.79-v7+ #1159 SMP Sun Nov 4 17:50:20 GMT 2018 armv7l The programs included with the ...
2
votes
0answers
15 views

ADXL345. Bits, resolution and g's

I have a Kistler type 8921 which produces 1g (10m/s2) RMS (at 159 Hz). The ADXL345/Raspberry Pi 3 setup should produce similar g's, but currently doesn't. As can be seen, it is not just about a ...
0
votes
1answer
32 views

UART Raspberry pi IoT (Windows IoT Core)

UART data transmission Raspberry pi UART (RX TX) Arduino I know should avoid async void. They are only used for event handling. For other methods return Task. async and await Where can there be a ...
-2
votes
0answers
22 views

Temperature and humidity readings from dht22 when connected to raspberry pi in field [on hold]

How do I take the readings when the pi is placed in the field? Also, how can I add a sms alert when the readings go beyond a certain limit?

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