30 votes
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Raspberry Pi Zero with Ethernet Over HDMI

No, the Pi Zero does not support ethernet over HDMI. Unfortunately the schematics for the Pi Zero are not available (edited: an overview schematics is available now, see updated information below). ...
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  • 15.5k
26 votes
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Setting up WiFi and Ethernet

This applies to Raspbian Wheezy prior to 2015-05-05 for later (and Jessie/Stretch) See How do I set up networking/WiFi/Static IP As suggested by the community, my answer extracted from the question. ...
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  • 996
11 votes
Accepted

Control your Raspberry Pi with the TV remote

This feature is called CEC. It allows a device to be controlled with a remote from a TV through the HDMI cable. You can even switch on/off automatically a device when you switch on/off your TV. It ...
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9 votes
Accepted

How can I replace Raspian SSH host keys if I can't login to pi? ("connection refused")

HOW TO REPLACE SSH HOST KEYS ON RASPBIAN W/O BOOTING INTO IT Note: I had this happen with a recent download and install of Raspian full... it occurred on a headless pi zero W and a headless pi 3B+. ...
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8 votes
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How to connect Raspberry Pi Zero to PC

The way I initially connected was with a USB serial dongle at the PC end connected to the Pi's UART and ground. You can then use terminal emulator software to log in to the Pi. You then have the old ...
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  • 67.3k
8 votes

How do I find out the IP address of my Pi?

You don't mention which OS you are using, but there area couple of ways to do this: You can try ssh pi@raspberrypi or ssh raspberrypi.local (this will may need to be adjusted if not using Raspbian - ...
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7 votes
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How do I send data from my pc to my raspberry pi?

From a programming perspective, messages on networks are transferred via sockets. There are two predominant forms of networking, connection (aka. stream) based and connectionless (aka. packet) based. ...
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  • 56.1k
7 votes
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Raspberry Pi 3 isn't finding WiFi Networks

You could try executing the following through the command prompt: sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade sudo rpi-update sudo reboot wait for reboot sudo branch=next rpi-...
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  • 411
7 votes

Connection between Raspberry Zero and Raspberry Pi 2 or 3

A USB OTG connection seems like the best option here. It will be much faster than about any alternative (certainly faster than I2C or UART), and with the g_ether driver you will be able to use it as a ...
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7 votes

Connection between Raspberry Zero and Raspberry Pi 2 or 3

By far the easiest options for moving large amounts of data between Pi Zeros and other Pis are USB OTG, which has already been covered by Dmitry Grigoryev's answer, and ethernet or WiFi. While USB ...
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  • 10.6k
7 votes
Accepted

Connect Android smartphone with Wi-Fi Direct to a Raspberry Pi

I have tested this with some different smart phones using Android 4.0, Android 6.0, Android 6.0.1 and Android 10, but mainly used the last one. I cannot give all examples so I will only use a ...
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  • 40k
6 votes

Can't detect a raspberry pi scanning my local network

You already reduced the setup to a minimum to locate the error. That's what I would suggest. But there is still your network environment involved. You can try to use a wired direct device to device ...
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  • 40k
6 votes
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Couldn't ssh to my Raspberry Pi - "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"

If you installed a new OS it has a new key. Any existing connection history on your computer is meaningless. Delete it! If you create a ~/.ssh/config you can disable StrictHostKeyChecking. I use the ...
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  • 54.1k
5 votes
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Electronics of a water pump

NO. That setup won't work. The GPIO pins are not suitable to drive equipment directly, due to the fact that: They can only provide a very limited current (up to 50mA, although this might be higher on ...
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  • 5,013
5 votes
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How to use Raspberry PI 2 without screen and keyboard?

SSH is a good way to access the command prompt over a network, via ethernet or wifi. VNC is a good way to access the desktop of your pi over a network. https://www.raspberrypi.org/documentation/remote-...
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  • 6,235
5 votes

reverse engineering: Transcend digital photo frame display to Raspberry Pi

The manual on the Trancend Website (see pjc50's answer) suggests that the unit will be recognised by a PC if a USB lead is connected to the mini-USB connector (C) on the SIDE of the case (not the full ...
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  • 3,581
5 votes

Raspberry Pi 3 - internal Wifi wont connect to network

I solved the problem. First I updated my settings as suggested in the link that Miliways provided in a comment in my original answer. That alone didn't solve it, what I actually had to do is change ...
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  • 141
5 votes

Unable to apt-get update but connected to internet?

You could also try and ping 8.8.8.8 to see if you are actually able to get packets out to the internet. If you are then check your DNS settings as per cat /etc/resolv.conf You would expect to see ...
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5 votes
Accepted

Not able to connect using Windows Remote Desktop Connection

The RPi and the PC need to be in the same logical network, which they are not. The computer is in the 192.168.225.0/24 network, and the Pi is in the 192.168.137.0/24 network. You need to change ...
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  • 1,456
4 votes
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Edimax EW-7811Un Frequently Drops SSH Connection

I had this exact problem, down to every detail stated in the original question. Upon additional searching, I saw this question (with the same wording) was cross-posted in the raspberrypi.org forums ...
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  • 66
4 votes

Ethernet and wifi together

I have read through this post, I don't know how many times, but just today I noticed: autho eth0 allow-hotplug eth0 iface eth0 inet static address 192.168.0.51 netmask 255.255.255.0 I know this is ...
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  • 41
4 votes

How to configure my raspberry pi to connect to network?

Usually these types of WAP's use something called Captive Portal, which intercepts http traffic on port 80, then redirects it to their login page until the user is logged in. Try getting the terminal ...
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  • 61
4 votes
Accepted

How to use JSN-SR04T on a Raspberry Pi?

It has exactly the same programming interface as the HC-SR04. You send a trigger pulse of 10µs or more on the trigger line. Shortly after the trigger line goes low the echo line will go high. The ...
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  • 67.3k
4 votes

reverse engineering: Transcend digital photo frame display to Raspberry Pi

The AM7338 is a dedicated Digital Picture Frame System on Chip (DFP SOC). It is a all in one single chip solution for DFPs, handling typical functions of buttons, IR remote, memory card and flash ...
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  • 301
4 votes
Accepted

Building a simple DIY rc car, am I missing anything?

Does your motor driver support controlling 2 motors? Have you thought about talking to your motor driver(from the Pi)? keep in mind the Bluetooth does use up the Pi's UART! (see comments for more ...
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  • 498
4 votes
Accepted

Connecting two Raspberry Pi's via Ethernet

The simplest way to hook up the two Pi's is to have a cat5e/cat6 cross over cable of sufficient length configure each Pi to have a unique static IP within the same network by editing the /etc/...
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4 votes
Accepted

Connecting Raspberry Pi to a photo frame

The Raspberry Pi DSI (Digital Serial Interface) connection. The problem is that not all LCD/TFT screens use the same implementation. DSI is a simple interface but the LCD/TFT controller needs to work ...
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  • 17.1k
4 votes

How can I connect 5 Raspberry Ppi's?

The obvious way is to use the Pi's Ethernet port and network them with a switch or router. Using the GPIO will be far more complicated and much slower. This question has nothing to do with the Pi in ...
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  • 67.3k
4 votes

SSH connection refused even though ssh file is in /boot

I had the same issue, I just renamed my SSH file to ssh (all small). and yes you've to do this before your first boot
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4 votes
Accepted

Clients cannot connect to pivpn server anymore

Well I found the solution for me - hopefully it helps you too! Found that /var/log/openvpn.log on the RPi had the line "VERIFY ERROR: depth=0, error=CRL has expired" Searching that gave several ...
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  • 156

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