Raspberry Pi Weekly Newsletter

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Top new questions this week:

Powering the Pi with 2 AA batteries

I've tested the Pi with a single 3.7V 18650 battery and this < 5$ power boost/power bank. It works, and this single battery runs for at least 1.5 or 2 hours. (Sidenote: during my tests, the ...

power-supply battery  
asked by Basj 4 votes
answered by joan 3 votes

Can't activate I2C on my B+

I'm trying to use the I2C pins on my Pi. All guides I can find talks about that I have to activate it using ether /etc/modprobe.d/raspi-blacklist.conf or raspi-config. However, nether works, the file ...

raspbian i2c  
asked by Zlug 3 votes
answered by joan 4 votes

RGB LED is not lighting up

I connected an RGB LED(common anode) via the GPIO, and tried to get it to light up, but for some reason when I run the command, the LED does not light up. Here's the code I'm using import RPi.GPIO ...

gpio python hardware led breadboard  
asked by Idris 3 votes
answered by Steve Robillard 1 vote

On-the-fly / mounted volume encryption for RPi

I have a Raspberry Pi B+, and I want a unitary, encrypted archive which I can read and write from/to at will. I want a single file on the RPi (or attached storage), which contains an entire directory ...

filesystem security software-recommendation  
asked by benxyzzy 3 votes
answered by Lars Pötter 2 votes

RPi crashes randomly after 1 to 2 days

I don't know what causes it so I write down what I found out so far, hoping it matters: I have multiple rpis installed in my house, all running perfectly, except this one. I exchanged that rpi ...

wifi kernel  
asked by marc40000 2 votes

GPIO Voltage Thresholds

It is obvious, that 3,3 V is a HIGH, and 0 V is a LOW at a GPIO input pin. But I am looking for the exact voltage thresholds for the GPIO input pins. I have a Pi B+ and a Pi 2. Watching this video ...

asked by Dennis 2 votes
answered by ppumkin 0 votes

Ethernet configuration not working using DHCP

My /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp allow-hotplug walnut iface wlan0 inet dhcp wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf iface default ...

networking wifi  
asked by jnd 2 votes

Greatest hits from previous weeks:

How to set up swap space?

Raspberry Pi has only 256 MB of RAM, so I would like to use swap space (either on SD card or attached USB storage). How do I set it up?

operating-systems memory swap-space  
asked by Tibor 45 votes
answered by finnw 25 votes

How do I install Google Chrome?

When I go to download Google Chrome from http://www.google.com/chrome in Midori on the Raspberry Pi , I am presented with a modal dialogue box, Please select your download package: 32 bit ...

software-installation web-browsers chromium midori  
asked by Andrew Fogg 68 votes
answered by Tass 91 votes

Can you answer these?

Determining correct J3 jumper setting on Compute Module IO Board

The Raspberry Pi Compute Module Development Kit Quick Start Guide says that prior to using the kit, the IO bank voltage jumpers (which power the GPIO banks) should be checked. However, I can find no ...

gpio power  
asked by jhfrontz 2 votes

Screaming Jelly Baby program problems

I am quite new to using the Raspberry Pi2. Currently I am trying to run the Screaming Jelly Baby program in Python by using the GPIO pins ...

gpio python  
asked by allred 1 vote

Connecting to a second network after first one is down

I have been working on my raspberry pi. I defined 2 different networks. First one is my home network and the second one is my phone(hotspot). When my hotspot is not available, it connects to my home ...

raspbian networking wifi wireless dhcp  
asked by Ahmet Tanakol 1 vote
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