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by Richard-TX
Thu Jan 02, 2014 6:07 pm
Forum: Networking and servers
Topic: Advice on home network setup
Replies: 6
Views: 2995

Re: Advice on home network setup

Having two access points is not a problem but you have to turn off the router section of the one that is not acting as a router. There is no point in having two networks. One is plenty for many good reasons. Here is my network (simplified) internet <-public IP-> *gateway linux server <-RFC1918 addr-...
by Richard-TX
Thu Jan 02, 2014 5:56 pm
Forum: General discussion
Topic: Pi with power usb hub
Replies: 3
Views: 714

Re: Pi with power usb hub

That is easy.

The later version has mounting holes among other things.

Image
by Richard-TX
Thu Jan 02, 2014 5:52 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: UART
Replies: 22
Views: 20409

Re: UART

I am going out on a limb anticipating the nest question. To change the speed of the uart one has to open the device and then change the speed using an ioctl call or issue a stty command depending on the programming language. Closing the device and reopening it results in it reverting back to the def...
by Richard-TX
Thu Jan 02, 2014 12:25 pm
Forum: Graphics, sound and multimedia
Topic: Portable music/radio streamer using i2s and TFT touchscreen
Replies: 5
Views: 5857

Re: Portable music/radio streamer using i2s and TFT touchscr

I took the easy way out when I did my music player. I used a Behringer UCA-202 ($29) as the Rpi audio isn't very good. I used mpc/mpd since there are free clients for Android, Windows, etc. I run mpd on the Rpi. It is trivial to create a web page to control mpd or to create your own hardware interfa...
by Richard-TX
Thu Jan 02, 2014 12:10 pm
Forum: General discussion
Topic: Network cable maximum length - RJ45
Replies: 19
Views: 4248

Re: Network cable maximum length - RJ45

If you want really long cables, use serial. I once ran tape player control over RS422 on a live TV transmission using two phone lines from London (UK) to Milan (Italy). Now we have the internet. It is much easier to control almost anything from anywhere to anywhere on or off the planet. :D http://w...
by Richard-TX
Thu Jan 02, 2014 12:06 pm
Forum: General discussion
Topic: Network cable maximum length - RJ45
Replies: 19
Views: 4248

Re: Network cable maximum length - RJ45

100 meters is guaranteed assuming good conditions. Stretching it to longer distances is possible but if it fails, no one can help you.

I have seen 200 meter runs of unshielded Cat4 that were reliable @ 10mbit. I have seen 10 meter runs that ran over some fluorescent lights that were not.
by Richard-TX
Thu Jan 02, 2014 11:56 am
Forum: Automation, sensing and robotics
Topic: Different Vdd and Vref on adc
Replies: 3
Views: 2126

Re: Different Vdd and Vref on adc

Yes, on page 3 under the section "Reference Input" there is a section titled "Voltage Range"
by Richard-TX
Thu Jan 02, 2014 8:21 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C vs GPIO vs UART vs SPI - Super Noob Question
Replies: 16
Views: 51280

Re: I2C vs GPIO vs UART vs SPI - Super Noob Question

UART is friendly and welcoming. Stop hatin' on UART, y'all :( No one is hating the UART. I can put 4 dual UART chips (SC16IS752IBS) on a single I2C bus So the max for a Rpi without Muxes is 16 uarts. Using 8 channel Muxes , I can get 64 buses *8 uarts*2 native buses or a maximum of 1024 of them on ...
by Richard-TX
Thu Jan 02, 2014 8:10 am
Forum: Troubleshooting
Topic: STICKY: WiFi Dongle Issues ? Start here !
Replies: 581
Views: 749281

Re: WiFi Issues ? Start here !

SirLagz wrote:using wpa-passphrase and wpa-ssid actually use wpa-supplicant anyway :P

But using the static IP address with multiple wifi networks is where the wpa-supplicant file comes in useful.
Agreed but all I want is for it to connect to my network. I am not about to take my Pi to a Starbucks..
by Richard-TX
Thu Jan 02, 2014 3:09 am
Forum: Troubleshooting
Topic: STICKY: WiFi Dongle Issues ? Start here !
Replies: 581
Views: 749281

Re: WiFi Issues ? Start here !

Here is my interfaces file for a static ip address. # cat /etc/network/interfaces auto lo iface lo inet loopback iface eth0 inet static address 10.232.1.81 netmask 255.255.255.0 gateway 10.232.1.1 auto wlan0 allow-hotplug wlan0 iface wlan0 inet static address 10.232.1.99 netmask 255.255.255.0 gatewa...
by Richard-TX
Thu Jan 02, 2014 1:48 am
Forum: Automation, sensing and robotics
Topic: Controlling wireless (Wi-Fi) LED bulbs from the Raspberry Pi
Replies: 8
Views: 24070

Re: Controlling wireless (Wi-Fi) LED bulbs from the Raspberr

Try this:

Code: Select all

make
touch utils.hpp
make
touch commands.cpp
make
by Richard-TX
Thu Jan 02, 2014 1:01 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C vs GPIO vs UART vs SPI - Super Noob Question
Replies: 16
Views: 51280

Re: I2C vs GPIO vs UART vs SPI - Super Noob Question

I2c == almost unlimited expansion capabilities, easy, almost everything can be done from the command line, programs can be written in almost any language. What's not to love? "Almost" being that there's a limit of 256 devices due to the I2C addressing scheme, with 7-bit I2C addressing that's reduce...
by Richard-TX
Wed Jan 01, 2014 11:35 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: I2C vs GPIO vs UART vs SPI - Super Noob Question
Replies: 16
Views: 51280

Re: I2C vs GPIO vs UART vs SPI - Super Noob Question

I2c == almost unlimited expansion capabilities, easy, almost everything can be done from the command line, programs can be written in almost any language. What's not to love?
by Richard-TX
Wed Jan 01, 2014 7:55 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using Slice of Pi/o and 16x2 LCD at the same time?
Replies: 30
Views: 7955

Re: Using Slice of Pi/o and 16x2 LCD at the same time?

Adafruit uses a MCP23008 ( half of a MCP23017) to drive their 16x2 LCD displays.
by Richard-TX
Wed Jan 01, 2014 3:18 pm
Forum: Troubleshooting
Topic: What am I doing wrong?
Replies: 14
Views: 2148

Re: What am I doing wrong?

Try putting Raspian on a card (4 gig or larger) and see if it boots. If just the green light does not flash after waiting for 30 seconds, it isn't booting. The green LED turns on when the Rpi accesses the SD card. If the issue is no video, then see if the Rpi is on the network. Nmap is one tool that...
by Richard-TX
Wed Jan 01, 2014 2:45 pm
Forum: Troubleshooting
Topic: Rainbow Splash Screen Upon Reboot
Replies: 18
Views: 4924

Re: Rainbow Splash Screen Upon Reboot

I get a rainbow splash screen whenever I power my Rpi from a USB hub. All of my Rpis work fine.

I have not seen any detrimental effects from it in over a year of nearly daily use.
by Richard-TX
Wed Jan 01, 2014 2:19 pm
Forum: Automation, sensing and robotics
Topic: Controlling wireless (Wi-Fi) LED bulbs from the Raspberry Pi
Replies: 8
Views: 24070

Re: Controlling wireless (Wi-Fi) LED bulbs from the Raspberr

I downloaded the sources. wget http://iqjar.com/download/jar/milight/milight_sources.zip I can see why you are excited. Why only 4 zones? Is that 4 zones per controller? Assuming I have 12 areas, I suppose that means I will have to have 3 controllers. One suggestion You might want to include a Readm...
by Richard-TX
Wed Jan 01, 2014 8:15 am
Forum: Advanced users
Topic: Only one PWM channel at GPIO 18 ?
Replies: 5
Views: 5381

Re: Only one PWM channel at GPIO 18 ?

Is it only one PWM channel available to users at GPIO18 ? Because I wanna drive 2 servo motor at the same time. What I found was they suggested me use this Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface - PCA9685 http://www.adafruit.com/products/815[/color]. Any idea guys ? Thx +1 on t...
by Richard-TX
Wed Jan 01, 2014 8:04 am
Forum: General discussion
Topic: Broadcast profanity delay
Replies: 13
Views: 3658

Re: Broadcast profanity delay

One way to do what you want is to create a ring buffer which would be done in software. The essence is that 5 seconds of audio is recorded, placed in the buffer and then playback occurs when the buffer is full. The biggest problem is dead air. Dump 5 seconds of audio and you are either live or are w...
by Richard-TX
Wed Jan 01, 2014 7:40 am
Forum: Beginners
Topic: MPU-6050 is not being displayed in i2c address table
Replies: 6
Views: 5901

Re: MPU-6050 is not being displayed in i2c address table

"For power supply flexibility, the MPU-60X0 operates from VDD power supply voltage range of 2.375V-3.46V. Additionally, the MPU-6050 provides a VLOGIC reference pin (in addition to its analog supply pin: VDD), which sets the logic levels of its I2C interface. The VLOGIC voltage may be 1.8V±5% or VDD...
by Richard-TX
Wed Jan 01, 2014 2:21 am
Forum: Beginners
Topic: Changing keyboard format to US English
Replies: 3
Views: 815

Re: Changing keyboard format to US English

go into raspi-config and select "configure keyboard" or "internationalization options"

then select the proper settings for you.
by Richard-TX
Wed Jan 01, 2014 2:13 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [SOLVED] Error scanning I2C controller (/dev/iic0)
Replies: 12
Views: 6537

Re: Error scanning I2C controller (/dev/iic0)

juedan wrote:
Did you have read what operation system I use?
Somehow I missed that entirely.

Since you are running BSD, YOYO* I can't help you. Sorry.

*You're On Your Own."

http://www.raspberrypi.org/downloads

Good luck.
by Richard-TX
Tue Dec 31, 2013 10:34 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [SOLVED] Error scanning I2C controller (/dev/iic0)
Replies: 12
Views: 6537

Re: Error scanning I2C controller (/dev/iic0)

# i2c -s -v dev: /dev/iic0, addr: 0x39, r/w: r, offset: 0x00, width: 8, count: 1 Error scanning I2C controller (/dev/iic0): Device not configured Scanning I2C devices on /dev/iic0: # that device name does not look valid to me. I would have expected /dev/i2c-1 or on a model A /dev/i2c-0
by Richard-TX
Tue Dec 31, 2013 10:32 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: [SOLVED] Error scanning I2C controller (/dev/iic0)
Replies: 12
Views: 6537

Re: Error scanning I2C controller (/dev/iic0)

What is the output from the following command look like?

Code: Select all

i2cdetect -y 1
by Richard-TX
Tue Dec 31, 2013 10:26 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Art Controller
Replies: 2
Views: 592

Re: Art Controller

You interface to it just like you would to any device that runs off + 5 volts. In other words, use an opto-isolator. Seems to me that all of the functions of that relay board could be done on the Rpi. Delayed make, delayed break, timed on and off, TOD actions, and more are easily done on the Rpi. sc...

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