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by bilibao
Wed May 01, 2013 1:21 pm
Forum: Graphics, sound and multimedia
Topic: Web interface for UPNP music streaming
Replies: 2
Views: 2714

Re: Web interface for UPNP music streaming

I managed to install updating the version of node.js and adding several modules with npm: /usr/local/bin/npm install socket.io /usr/local/bin/npm install sqlite3 /usr/local/bin/npm install socket.io /usr/local/bin/npm install mongojs /usr/local/bin/npm install http-proxy /usr/local/bin/npm install b...
by bilibao
Wed May 01, 2013 8:27 am
Forum: Graphics, sound and multimedia
Topic: Web interface for UPNP music streaming
Replies: 2
Views: 2714

Re: Web interface for UPNP music streaming

Hi,
I'm very interested in this and I may help further developing too.
I just tried to install it but didn't get what I should really do to launch it.

can you help with some instructions on how to test?
Andrea
by bilibao
Fri Mar 29, 2013 6:21 pm
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

please note that my original schematic had pin 8 and 9 of the 74HC125 swapped, the right schematic is attached
by bilibao
Fri Mar 29, 2013 6:15 pm
Forum: HATs and other add-ons
Topic: RaspberryPi and "The Internet of Things"
Replies: 10
Views: 4660

Re: RaspberryPi and "The Internet of Things"

Dear all, in case you are still interested in a RFM22 network for the r-pi (rather than the RFM12), I made some test PCB for RFM22B+ATmega that I use to implement remote temperature, humidity sensor, electricity meter reader etc.. (see attached the PCB and a assembled temperature sensor) The "receiv...
by bilibao
Sun Dec 16, 2012 11:23 am
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

Hi, I use the patched version of avrdude that was given at http://blog.stevemarple.co.uk/2012/07/avrarduino-isp-programmer-using.html, you can download it from: http://project-downloads.drogon.net/files/ then sudo avrdude -c gpio -p m328p -v -e -U flash:w:.build/uno/firmware.hex where ".build/uno/fi...
by bilibao
Sun Dec 09, 2012 8:49 pm
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

I think having a tristate output with some OE pin would be better.
by bilibao
Tue Nov 20, 2012 10:39 am
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

see below a couple of dumps of the I and V as sampled by the ATMega ADC.
IvsV.png
Current (red) vs Voltage (blue) as read via the ATMega while producing more energy from PV than consumed by the house
IvsV.png (25.41 KiB) Viewed 6535 times
IvsV-absorbing.png
Current (red) vs Voltage (blue) as read via the ATMega in a period of absorption from the grid
IvsV-absorbing.png (23.21 KiB) Viewed 6535 times
the information is read at each "blink" to determine the "direction" of the power flow. You can see that the two cases have opposite phases.
by bilibao
Mon Nov 19, 2012 9:12 pm
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

So here a schematic of the basic circuit (i.e. without RFM22B transmitter) that I use to read the meter LEDs (usual caveat, the schematic below is drawn after I actually build the circuit, so it could be different, i.e. wrong, then the actual one) pi-atmega-ele-meter.png The pins 1 and 3 of the conn...
by bilibao
Mon Nov 19, 2012 1:45 pm
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

I can post more details this evening (perhaps in a separate post), anyhow the setup is quite specific to the italian meters. In particular: -we typically have two meters: one only for "production" and one for bi-directional net balance to the grid (i.e. production - local consumption) - meters are b...
by bilibao
Mon Nov 19, 2012 12:49 pm
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Re: Simple, cheap, ATMega328 self programming extension boar

I didn't even try to get some arduino like pinout (I guess there are some projects around already), I just needed Arduino functionalities (in particular ADC) and this was the simplest way. In fact the board above is just the bare board. I then soldered additional wiring directly (in particular I mad...
by bilibao
Sat Nov 10, 2012 1:21 pm
Forum: HATs and other add-ons
Topic: RaspberryPi and "The Internet of Things"
Replies: 10
Views: 4660

Re: RaspberryPi and "The Internet of Things"

Hi, an alternative approach is to use RFM22B modules. I already tested it with arduino environment and it works quite well. It is possible to make simple and very low power consumption sensors with 1 Atmega + 1 RFM22B. Interfacing an RFM22B to RPi (acting as "server") should not be too difficult. I'...
by bilibao
Sat Nov 10, 2012 8:17 am
Forum: HATs and other add-ons
Topic: Simple, cheap, ATMega328 self programming extension board
Replies: 12
Views: 6746

Simple, cheap, ATMega328 self programming extension board

EDIT this schematic is buggy, pin 8 and 9 of the 74125 are swapped, see post below I want to share this very simple boiler-plate circuit to inexpensively add Arduino features to the RPi. I needed ADC for my R-Pi and I was used to arduino, so I decided to add an ATMega328P to my pi. In addition to a...
by bilibao
Sat Oct 20, 2012 12:21 pm
Forum: Troubleshooting
Topic: rt5370 (D-Link DWA-125) Wifi not creating wlan0
Replies: 22
Views: 21772

Re: rt5370 (D-Link DWA-125) Wifi not creating wlan0

You can try using the ralinktech driver (compiling it your self) [I did it successfully with 3.1.9+ kernel and redoing it right now for 3.2.27] First you need to get linux headers as explained in: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=71&t=17666&view=unread#unread then download and insta...
by bilibao
Thu Aug 02, 2012 11:40 am
Forum: Beginners
Topic: How to setup a Ralink RT5370
Replies: 2
Views: 4268

Re: How to setup a Ralink RT5370

A combination of the info in these two links should work (testing it right now): http://ubuntuforums.org/showthread.php?t=1289917 https://www.grendelman.net/wp/compiling-kernel-modules-for-raspbian-raspberry-pi/ i.e. download the code from http://www.ralinktech.com/en/04_support/support.php?sn=501 i...

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