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by stevech
Tue Oct 01, 2013 11:58 pm
Forum: General discussion
Topic: Raspberry to laptop through HDMI
Replies: 7
Views: 78777

Re: Raspberry to laptop through HDMI

I used HDMI only for the first boot-up/config. Then I installed VNC or UltraVNC, server on RPi, client on PC/laptops.
Config that, then use VNC to get remote display. No need for HDMI cable and dedicated monitor, nor dedicated mouse/keyboard.
by stevech
Tue Oct 01, 2013 2:21 am
Forum: General discussion
Topic: COBOL Forum
Replies: 24
Views: 3609

Re: COBOL Forum

How many users here even KNOW what COBOL is!
by stevech
Sat Sep 28, 2013 9:00 pm
Forum: Off topic discussion
Topic: Microduino Is a Tiny Arduino Compatible Board with Stackable
Replies: 7
Views: 2149

Re: Microduino Is a Tiny Arduino Compatible Board with Stack

the lowest cost CPU module has no USB or serial port. For that, you must add the cost and size of another stacked board. I wonder why the base CPU doesn't use an ARM with on-chip USB? This makes the cost unfavorable versus the PJRC Teensy2. Probably same sq. in. total. But the microduino is cute, in...
by stevech
Sat Sep 28, 2013 4:22 pm
Forum: Troubleshooting
Topic: Need help with fstab for latest release
Replies: 3
Views: 573

Re: Need help with fstab for latest release

The fstab line below works with the prior RPi standard release but not the most recent release. The result is that with sudo, read/write to NAS' share works. Without sudo, the normal RPi login user lacks write permission; read and create work (oddly). I've tried many things to no avail. the mount po...
by stevech
Fri Sep 27, 2013 8:53 pm
Forum: Troubleshooting
Topic: Need help with fstab for latest release
Replies: 3
Views: 573

Re: Need help with fstab for latest release

No one tried this with the new OS?
by stevech
Fri Sep 27, 2013 4:46 am
Forum: Troubleshooting
Topic: Need help with fstab for latest release
Replies: 3
Views: 573

Need help with fstab for latest release

In this 2013-09-10 release of the OS.... Having trouble with fstab line that mounts a folder on my network attached storage (NAS) device: Synology DS212. With the prior version of the OS, the line I added to fstab worked fine. The NAS directory worked OK. User did not have to be root/sudo. With this...
by stevech
Tue Aug 20, 2013 5:18 am
Forum: General discussion
Topic: Elderly person fall monitor
Replies: 9
Views: 3603

Re: Elderly person fall monitor

Safety device : DIY ? Just Say No
by stevech
Tue Aug 13, 2013 9:56 pm
Forum: General discussion
Topic: Recommend a Pi alternative for a (usable) NAS?
Replies: 15
Views: 10251

Re: Recommend a Pi alternative for a (usable) NAS?

A NAS is all about features, GUI and ease of use. I shopped long and hard. Happy with Synology DS212 (though the DS212j would have been cheaper, < $175). Buy as drive-less; use your own drives. I don't use the RAID capability in the 2 drive NAS; I use two independent file systems/volumes. But look a...
by stevech
Sun Jul 21, 2013 9:04 pm
Forum: General discussion
Topic: ******** the pi!
Replies: 30
Views: 4481

Re: ******** the pi!

One should use Linux on a PC for quite a while before messing with the RPi.

There is a bit of fault on the pi community side, esp. the media and the inventors - in representing it to be suitable for entry level users. It is far from that.
by stevech
Fri Jul 12, 2013 6:52 am
Forum: Python
Topic: send trame via uart
Replies: 4
Views: 1500

Re: send trame via uart

that hex string - is it the start of an XBee API command? If so, there are existing XBee libraries. I did a large Python program that uses Python (old version) to talk with an Xbee - direct to the OS device driver to make it fast. I opened the serial port via the OS, that returned a handle. Then I u...
by stevech
Sun Jul 07, 2013 8:36 pm
Forum: General discussion
Topic: Power for an external HDD
Replies: 61
Views: 72998

Re: Power for an external HDD

Use an external drive in an enclosure with its own power supply. Avoid such that are USB powered.
by stevech
Thu Jun 27, 2013 6:04 am
Forum: General discussion
Topic: Static ip with WiFi
Replies: 4
Views: 5822

Re: Static ip with WiFi

when you change the IP address for an ethernet device, other devices on the LAN have to change their ARP tables to match. An ARP table is the pairing of an IP address with a MAC address (hardware address). What's supposed to happen is: If the changing device drops its ethernet link connection (cable...
by stevech
Sun Jun 23, 2013 4:33 am
Forum: General discussion
Topic: ssd
Replies: 11
Views: 7065

Re: ssd

USB enclosure for SSD.

A good USB flash drive (thumb) is cheaper, nearly as good for a data disk.
by stevech
Fri May 31, 2013 3:20 am
Forum: General discussion
Topic: FreeNas
Replies: 19
Views: 133013

Re: FreeNas

To slow for me
by stevech
Wed May 15, 2013 2:26 am
Forum: General discussion
Topic: Raspberry Pi on tonights episode of Revolution
Replies: 7
Views: 1902

Re: Raspberry Pi on tonights episode of Revolution

you'd get a laugh about what they do on TV/Movie sets - then the "talent" (actor) is working with a computer.
by stevech
Sat Apr 27, 2013 5:32 pm
Forum: Python
Topic: Python3 Serial issue on rpi
Replies: 4
Views: 8139

Re: Python3 Serial issue on rpi

IMO, Python 3 is too leading edge. Better to use 2.x
by stevech
Sat Apr 27, 2013 5:29 pm
Forum: General discussion
Topic: home alarm motion sensor
Replies: 5
Views: 6382

Re: home alarm motion sensor

X10 has $10 motion sensors that send wirelessly to an X10 gateway. The gateway converts the RF message to a standard X10 message on the power line. There are low cost devices that take the message from the power line and make it RS232 serial or USB. The ZigBee sensors are costly. A more DIY approach...
by stevech
Tue Apr 23, 2013 2:43 am
Forum: Python
Topic: Passing a python variable to javascript
Replies: 10
Views: 4492

Re: Passing a python variable to javascript

Yes you can. Usually you would do an AJAX request from the javascript side and have your framework return the data you have requested. The details depend on the server framework and the javascript library you may or may not be using. You should include more details in your question. What are you tr...
by stevech
Fri Apr 19, 2013 3:47 am
Forum: Python
Topic: Passing a python variable to javascript
Replies: 10
Views: 4492

Re: Passing a python variable to javascript

can we do javascript on the default OS of the RPi?
by stevech
Tue Apr 16, 2013 4:31 am
Forum: Python
Topic: Shot down on my first 2 lines of code. Why?
Replies: 23
Views: 2552

Re: Shot down on my first 2 lines of code. Why?

urge you to use Pyton 2.7 rather than Python 3. Avoid the bleeding edge.
by stevech
Sun Apr 14, 2013 7:41 pm
Forum: General discussion
Topic: Kiosk Pi
Replies: 5
Views: 772

Re: Kiosk Pi

For a reliable and unattended kiosk, I'd use, instead of an RPi, a small form factor computer with Linux or Windows and a theater-mode browser. Zotac makes these.
by stevech
Sun Apr 14, 2013 7:39 pm
Forum: General discussion
Topic: I broke a cap off my Pi. Help?
Replies: 4
Views: 1016

Re: I broke a cap off my Pi. Help?

Me too - broke off the capacitor. Only impact might be that a really crummy power supply for wall outlets to USB might not be usable.

The choice of a thru-hole capacitor rather with bent-over leads was a too cheap design.
Rather than a real surface mount electrolytic.
by stevech
Sun Apr 14, 2013 4:49 am
Forum: Python
Topic: Could somebody try explaining this differently please?
Replies: 5
Views: 895

Re: Could somebody try explaining this differently please?

My duty cycle for eating is too high.
by stevech
Sun Apr 14, 2013 4:46 am
Forum: General discussion
Topic: Consultant Needed
Replies: 2
Views: 561

Re: Consultant Needed

I wouldn't do it with a Pi, for commercial Kiosks with service assurance, etc. I'd use a small brick computer and an SSD and FF or IE in the "theater/kiosk" mode. Hard to lock-down a kiosk PC to keep a visitor (kid) from honking it up. You'll also need a hardware watchdog timer to auto-reboot if hung.
by stevech
Thu Apr 04, 2013 5:04 am
Forum: Python
Topic: Trying to access ttyAMA0 like I do in bash
Replies: 2
Views: 698

Re: Trying to access ttyAMA0 like I do in bash

1. Buy/read a book on Python
2. Read about the serial module and serial.serial
3. Write code to open the serial port then write strings to it, to include the Python way to convert integers to HEX strings
4. You should close the serial port.

Just like in other languages.

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