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by paulv
Fri Feb 10, 2017 4:16 pm
Forum: Advanced users
Topic: Wearout Prevention of SD card memory
Replies: 39
Views: 56040

Re: Wearout Prevention of SD card memory

I have been using busybox-syslogd for a couple of months now, and I'm happy with it. The syslogd setup replaces the logging to the filesystem, and stores the log into a RAM based ringbuffer. It is especially made for embedded systems, diskless systems, or, -tada- flash disk based systems. Google it ...
by paulv
Mon Feb 06, 2017 10:50 am
Forum: Automation, sensing and robotics
Topic: Add an analog output to the Pi (DAC)
Replies: 15
Views: 16062

Re: Add an analog output to the Pi (DAC)

Hi Magnus354, I'm not sure that I understand what you mean by your question to "record" the resulting signal. To see the result of the digital to analog conversion, you can use an oscilloscope or an analog data logger to look at the signal, and record it. You can also use an analog to digital conver...
by paulv
Wed Jan 25, 2017 8:51 pm
Forum: Media centres
Topic: How-To: Un-geoblock Netflix and cast movies to a TV
Replies: 12
Views: 22589

Re: How-To: Un-geoblock Netflix and cast movies to a TV

No ab1, it's not the same. Although a nice setup, it is no different than using a commercial VPN setup, and they can be/will be blocked because their IP addresses can be easily found and blocked by the likes of Netflix, as has been done by many other VPN's already. That happened to me, as you can re...
by paulv
Tue Jan 17, 2017 1:58 pm
Forum: Advanced users
Topic: STICKY: HOWTO: Move the filesystem to a USB stick/Drive
Replies: 334
Views: 496585

Re: HOWTO: Move the filesystem to a USB stick/Drive [updated

Thank you for the tip, I've added the command to edit /boot/cmdline.txt.
by paulv
Thu Jan 12, 2017 3:42 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

First of all, I goofed with the current consumption. Typing on an iPad has it's challenges. The current is about 40mA, not 4. I cannot see a clock on my scope coming from the X1 x-tal. I see a steady 0.7V on pin1 and only some noise on pin3. If I "hoover" with my probe closely above the PCB, there i...
by paulv
Wed Jan 11, 2017 1:43 pm
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

Hi RaTTuS, Everything is stone cold. I'm not surprised because total current consumption is about 40mA. (typo!, erlier showed 4mA) When I supply 5V02 (supplied by a bench supply through P1), I measure 5V02 at P1-2 and C3, 3V33 at P1-1 and also at C7, and 1V80 at C8. Around U16, I measure 5V at C161,...
by paulv
Wed Jan 11, 2017 12:23 pm
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

Send flowers?

The QR-code is too small, I tried two apps, and they can't read it.
by paulv
Wed Jan 11, 2017 11:37 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

Thank you gregeric, I now have all that I need to engrave a tombstone for my 2B. What I still need is the cause of death to put on the death certificate, needed for burial permission. I can't except "natural causes" though, that still won't fly. While waiting for that, I'm still debating organ donor...
by paulv
Wed Jan 11, 2017 8:25 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

Yep the code on the SoC indeed missed a "1" this one is laser engraved and difficult to see, even under an LED lamp with magnifying glass. The RAM really says 15300R03100, I double checked. The SD card has : 50930AC The silkscreen has : "delta", RU-reversed and then KCE MC1 1540, V-OF3, 7-1 Hi Phil,...
by paulv
Wed Jan 11, 2017 7:14 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

This is a Pi 2 Model B V1.1, made in the UK. It has a tiny QR-code sticker on the back with what seems like a date code (28/11) I purchased it in 2016, so it was maybe manufactured on November 28, 2015. The Broadcom chip has this: BCM2836RIFBG, TE154, P10, 544925-22 N3 W The Elpida RAM chip has this...
by paulv
Wed Jan 11, 2017 6:45 am
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Re: Bricked pi2b after rpi-update.

This was posted in the advance section to avoid getting the obvious shooting from the hip replies... I tend to check the posters credentials before I offer advice, rather than getting my postings score up. If you would check my posts on this forum, you could see that I'm pretty experienced with Gpio...
by paulv
Tue Jan 10, 2017 5:09 pm
Forum: Advanced users
Topic: Bricked pi2b after rpi-update.
Replies: 27
Views: 4118

Bricked pi2b after rpi-update.

I'm putting this in the advanced section for a reason. To qualify, I have more than 3 years of experience with many RPI's, and I'm an electrical engineer by trade, albeit catching-up from wisdom collected decades ago. First of all, the reason I had to revert to rpi-update is because the cifs drivers...
by paulv
Mon Jan 02, 2017 4:36 pm
Forum: Automation, sensing and robotics
Topic: Adafruit DHT temp/humid sensor
Replies: 76
Views: 40896

Re: Adafruit DHT temp/humid sensor

By now this is a pretty old post, but I think still valuable if you are trying to use the DHT11, DHT22 or the AM2302. Previously, I only worked with the DHT22 and the AM2302. Just for the sake of completeness, I installed the spidev driver on the latest kernel, and the only thing that changes is the...
by paulv
Sun Dec 11, 2016 10:25 am
Forum: Media centres
Topic: How-To: Un-geoblock Netflix and cast movies to a TV
Replies: 12
Views: 22589

Re: How-To: Un-geoblock Netflix and cast movies to a TV

Hi Ida,

Glad this post was useful for you.
Unfortunately, I can't help you with the "whitelisting", I have no experience with that.

Success!
by paulv
Tue Oct 11, 2016 7:02 pm
Forum: Advanced users
Topic: Is this the correct way to install the watchdog package?
Replies: 46
Views: 57783

Re: Is this the correct way to install the watchdog package?

Hi gkoper, Thanks for contributing to this post. My own experience, after several years of working with the RPi's, is that the RPi environment is still very much a work in progress (no, that's a bit too generous, let's call it process). As other users regularly comment, the goal posts seem to get mo...
by paulv
Sun Oct 02, 2016 1:14 pm
Forum: Advanced users
Topic: Is this the correct way to install the watchdog package?
Replies: 46
Views: 57783

Re: Is this the correct way to install the watchdog package?

Are you on the same software version that I used to report my post? Linux raspi-svr 4.4.9+ #884 Fri May 6 17:25:37 BST 2016 armv6l GNU/Linux If you are on a newer version, you can thank the powers to be for yet another change of the goalposts, and I can't help you at this moment. Maybe somebody else...
by paulv
Sun Oct 02, 2016 12:50 pm
Forum: Advanced users
Topic: Is this the correct way to install the watchdog package?
Replies: 46
Views: 57783

Re: Is this the correct way to install the watchdog package?

shalvan,

You're not very specific.
What does the status report tell you? Can you post that?
by paulv
Thu Sep 29, 2016 4:07 am
Forum: Automation, sensing and robotics
Topic: HOW-TO Build an Automatic Power Supply for the Pi
Replies: 39
Views: 35673

Re: HOW-TO Build an Automatic Power Supply for the Pi

Hi Haccks, How much it would cost is difficult to say. If you're a hobbyist, you will have most parts already. If not, it really depends on where you live and get your parts from. However, a more modern version is available that can be built relatively easy and not very expensive. Depending on where...
by paulv
Mon Sep 26, 2016 5:21 pm
Forum: Advanced users
Topic: Is this the correct way to install the watchdog package?
Replies: 46
Views: 57783

Re: Is this the correct way to install the watchdog package?

Hi Samweis,

This is most likely the appropriate way of getting the watchdog to behave with systemd.
I found that out using another package, so this is probably the way to go.

Thanks for contributing!

Paul
by paulv
Mon Sep 26, 2016 4:26 am
Forum: Automation, sensing and robotics
Topic: Yet Another Rotary Encoder Solution (Python)
Replies: 8
Views: 12257

Re: Yet Another Rotary Encoder Solution (Python)

If you follow my hardware example and software design for the rotary switch, you need 10K pull-downs. Look at the diagram in the first post of this topic. I used 10K pull-down resistors in this application, because that is the value needed for the optimum de-bounce in combination with the capacitor ...
by paulv
Mon Sep 19, 2016 9:14 am
Forum: Automation, sensing and robotics
Topic: Yet Another Rotary Encoder Solution (Python)
Replies: 8
Views: 12257

Re: Yet Another Rotary Encoder Solution (Python)

Well, you need to remember that the RPi GPIO pull-ups are only about 50K Ohms. They were most likely designed for CMOS applications and the likes, not for hobbyists. For an exercise, calculate the current that flows from a 3.3V supply. You need to be aware of this limitation (a very meager pull-up/d...
by paulv
Sat Sep 10, 2016 7:33 am
Forum: Beginners
Topic: HOW-TO Start/Stop/Powerdown Pi with 1 Button
Replies: 30
Views: 22749

Re: HOW-TO Start/Stop/Powerdown Pi with 1 Button

Hi maranatha, What you are seeing is the "normal" end of the shutdown (power down) process. In simple terms, the main process thread (0) gets terminated, and that "seems" to cause a kernel panic. Study the last statements on the console. It is OK. You can search this Forum for more information or us...
by paulv
Tue Sep 06, 2016 7:05 am
Forum: Beginners
Topic: HOW-TO Start/Stop/Powerdown Pi with 1 Button
Replies: 30
Views: 22749

Re: HOW-TO Start/Stop/Powerdown Pi with 1 Button

Just use the part that details the activation of the powerdown overlay to get a GPIO pin that signals the end of the halt/shutdown/powerdown sequence.
by paulv
Mon Sep 05, 2016 10:12 am
Forum: Beginners
Topic: HOW-TO Start/Stop/Powerdown Pi with 1 Button
Replies: 30
Views: 22749

Re: HOW-TO Start/Stop/Powerdown Pi with 1 Button

maranata,

I suggest you carefully read my post because it has the answer to your question.
Success!
by paulv
Tue Aug 23, 2016 7:28 pm
Forum: Automation, sensing and robotics
Topic: Yet Another Rotary Encoder Solution (Python)
Replies: 8
Views: 12257

Re: Yet Another Rotary Encoder Solution (Python)

Hi Danny, Glad you like it. If you want to add a button, I suggest you have a look at the following post, because depending on your application and environment, adding a simple button seems easy enough, but can be frustratingly difficult. https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=13374...

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