Raspberry Pi Weekly Newsletter

Raspberry Pi newsletter

Top new questions this week:

Optimal gpu_mem_512 split for headless server

I own a Raspberry PI model B with 512MB of RAM. I am not running any graphical application on it. It just run a few services and when I need to administer it I do that via SSH. I see that my ...

asked by mariosangiorgio 2 votes
answered by lenik 3 votes

Compiling WiringPi (GPIO input) into raspistill/raspivid

I want to synchronize a stereo camera for either stills or video. The goal is the smallest possible delay between GPIO trigger input and camera shutter actuation (so that stereo is possibly in sync) ...

gpio camera  
asked by Kozuch 1 vote
answered by joan 1 vote

How to get RPi to generate a triangle wave, then outputting a PWM signal

I want my Raspberry Pi B+ Model to generate a triangle wave and output a PWM signal from one of the GPIO pins, but I'm not sure how to go about doing this. All I want it to do is add some small length ...

raspbian gpio python rpi.gpio pwm  
asked by ashlyk321 1 vote

Is it normal to irssi freezes when receiving dcc?

I'm running it over screen with Raspberry Pi Model B, but when a streaming begins, I am unable to type anything, even Alt + Arrow doesn't work, but changing screen's window with Ctrl+A + # works, so, ...

ssh performance screen irc  
asked by Tiago Pimenta 1 vote

cec-client works when run from cli but not from cron

So when I run either of the following from the cli (SSH session) my pi will turn on my Samsung TV: echo "as" | cec-client -s echo "on 0" | cec-client -s However when I but either of these into cron ...

raspbian cron  
asked by Andy B 1 vote
answered by Andy B 1 vote

Activate RPI-cam with rfid signal

Can anyone give me some advice on the next. Is it possible to activate the RPI-cam with a signal from a rfid reader? Here's the practical enviroment. I am a pigeon fancier and my pigeons are ...

camera rfid  
asked by user3477948 1 vote
answered by Dave Jones 1 vote

Tor Proxy (gateway) with Raspberry Pi

So I followed the tutorial on AdaFruit to make a Tor proxy with the Raspberry Pi. I got it working as a router and I can connect to it fine with another computer. Hostapd and DHCP server are always ...

asked by Brett 1 vote

Greatest hits from previous weeks:

How do I determine the current MHz?

I've been trying to get an accurate reading of my Raspberry Pi's MHz, since I overclocked it in /boot/config.txt My /boot/config.txt is as following: pi@raspbmc:~$ cat /boot/config.txt arm_freq=900 ...

performance linux processor-speed  
asked by Sjaak Trekhaak 24 votes
answered by keiki 19 votes

How do I turn on my Raspberry Pi after shutdown?

My Raspberry Pi runs OpenELEC. The XBMC has a Power-button in the left-bottom corner where I can shutdown the Raspberry Pi. That works fine, but I can't figure out how to turn it on again after the ...

boot xbmc openelec  
asked by Cupcake 20 votes
answered by Frepa 21 votes

Can you answer this?

Connecting to an RC522 RFID reader

I'm trying to connect an RC522 RFID reader to the a Raspi via its serial ports. Up till now, I have tried several different pieces of code that are supposedly working, however, I have had no success ...

serial rfid  
asked by Urban 1 vote
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