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by kaksi
Fri Aug 23, 2019 9:15 pm
Forum: General discussion
Topic: External Antenna
Replies: 27
Views: 1206

Re: External Antenna

besides the current antenna already puts out the maximum signal strength allowed by certification institutes. On the very same places (I tested 3), my phone and my notebook get an IP from the router on the roof and communicate with it. My PRIs detect the router, but hostname -I shows something for ...
by kaksi
Mon Jun 24, 2019 10:15 am
Forum: General discussion
Topic: Regular restart vs power on after electricity drop down
Replies: 11
Views: 1142

Re: Regular restart vs power on after electricity drop down

People running important software will do a lot of testing of their applications on a new OS release before putting it into production. The trouble is that they do not rewrite and test my applications. I got more or less my camera working when the the PI3 came out - the conversion was a nightmare (...
by kaksi
Sat Apr 13, 2019 10:26 am
Forum: General discussion
Topic: Cannot format write protected card problem [solved]
Replies: 21
Views: 2321

Re: Cannot format write protected card problem

John50 wrote:
Thu Apr 04, 2019 9:36 pm
Finally I went to the chinese and bought a usb card reader for less than 3 euro and to my surprise it worked...

Maeby this experience could be help to someone who eventually has this problem.
Any additional information about the card reader? Where can I buy it?
by kaksi
Mon Apr 01, 2019 4:07 pm
Forum: General discussion
Topic: Cannot format write protected card problem [solved]
Replies: 21
Views: 2321

Re: Cannot format write protected card problem

then the card has locked up itself to protect it content because it has detected major problems while writing to is storage. Well, if the "major" problem was power outage, there is a good chance that the card is still usable. I had quite a few problems like that and succeeded to format it in an old...
by kaksi
Wed Mar 06, 2019 9:48 am
Forum: General discussion
Topic: Finding differences in identical pis?
Replies: 10
Views: 549

Re: Finding differences in identical pis?

I am surprised no one mentioned the MAC address.
by kaksi
Wed Mar 06, 2019 9:34 am
Forum: General discussion
Topic: impossible place Keyboard in AZERTI
Replies: 10
Views: 410

Re: impossible place Keyboard in AZERTI

The full content of my sudo nano /etc/default/keyboard:

Code: Select all

XKBMODEL=pc105
XKBLAYOUT=ch
XKBVARIANT=
XKBOPTIONS=
BACKSPACE=guess
Even if it is in Swiss German, it is usable. What about starting just with fr?

May depend on you OS, on RPI2, I had to adapt the line to:

Code: Select all

set XKBLAYOUT="ch"
by kaksi
Wed Feb 20, 2019 12:52 am
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

Your P/S isn't a power supply (it's a phone charger). You need a power supply. To elaborate a bit more on what I posted above, phone charging does not require precise voltage control. Most phones only need a little over 4.2V to charge. Because of that, some phone chargers have poor voltage regulati...
by kaksi
Tue Feb 19, 2019 11:41 pm
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

You are now describing something different to what you described before, when you gave normal voltage readings. Switching rates and other interruptions count as the "brownouts" I described before. You may indeed need to look for UPS solutions -- but the type of PSU you are using also contribute to ...
by kaksi
Tue Feb 19, 2019 10:03 pm
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

The Dallas sensors usually give +85°C if they have an error, not -85°C. Most times I have encountered this it was because of bad wiring causing power loss to the sensor. As for the Pi, a proper power supply should be able to power a Pi with the voltage range you listed with no trouble. DS18B20 won'...
by kaksi
Tue Feb 19, 2019 12:56 am
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

Put it on hold for a moment.

You are all seeking for a problem with the RPI. I am sure the RPIs are OK - it is simply not possible to have 3 faulty RPIs or 4 faulty P/S.

To be really, really sure, I will try to borrow a UPS this or next weekend and I will come back.
by kaksi
Tue Feb 19, 2019 12:36 am
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

Are your "original P/S" the official Raspberry Pi PSU, or something else supplied by your retailer? What is the voltage and current marked on the label? HN-5258 .... OUTPUT: 5V 2500mA I even made adapt the charger from ACER able to deliver 3 A. Is the Raspbian Stretch an upgrade of an older OS, or ...
by kaksi
Tue Feb 19, 2019 12:27 am
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

Do not tell me to use the original P/S, I am already using it. Your quote above tells us nothing, other than it's the PSU you've always been using. Sorry, what I meant: "the original Raspberry Pi power supply delivered with the Raspberry Pi." Also, the original "Official" PSU was rated for 2A, but ...
by kaksi
Tue Feb 19, 2019 12:15 am
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

ptimlin wrote:
Mon Feb 18, 2019 11:38 pm
Just to be sure, you are not running three Pi units off of a single power supply are you?
No, each PI has it's own P/S.
by kaksi
Mon Feb 18, 2019 11:18 pm
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

davidcoton wrote:
Mon Feb 18, 2019 11:06 pm
What OS?
Two of them are running under Stretch, the third one under Jessie, being now reformatted to Stretch.
davidcoton wrote:
Mon Feb 18, 2019 11:06 pm
What is connected to each Pi?
Camera, keyboard, mouse, eth, monitor.

When it runs with camera only, I log /opt/vc/bin/vcgencmd get_throttled.
by kaksi
Mon Feb 18, 2019 11:02 pm
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

Re: All my RPIs 3 are underpowered, all the time

Concerning the PIs, there is a yellow flashing bolt on the left top on the screen (I supposed it was clear from the topic). When I power the PI on, the first message is 'undervoltage detected'. I repeat, I use the original P/S. Concerning the Arduino, this is clearly a measurement error, I bet cause...
by kaksi
Mon Feb 18, 2019 10:47 pm
Forum: General discussion
Topic: All my RPIs 3 are underpowered, all the time
Replies: 23
Views: 1099

All my RPIs 3 are underpowered, all the time

Do not tell me to use the original P/S, I am already using it. I am running Arduino with some Dallas DS18B20 and from time to time, the temperature in the living room drops in 5 seconds from 20 Celsius to -85 Celsius. About 6 months ago, there were guys from the power company, so I told them about t...
by kaksi
Mon Feb 18, 2019 10:32 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 1343

Re: Using RPI with camera below 0 Celsius?

I left the PIs at room temperature for a long time and then make them take a bath in isopropylalcohol. The RPI3 is OK again, the RPI2 not. It will take some time till I will risk a RPI3 outside. Any idea what I could do with the RPI2 before scraping it? The only way I know to repair electronics is a...
by kaksi
Tue Jan 22, 2019 2:37 am
Forum: General discussion
Topic: computer power supply
Replies: 26
Views: 1598

Re: computer power supply

I want to connect a rasspberry pi to a computer power supply does a computer power supply work by supplying demanded amps or just give it all the juice at once? Curious as to why you'd want to use a computer power supply on a Pi? I have a collection of P/S with a noisy/blocked fan, not worth repair...
by kaksi
Sat Jan 12, 2019 10:02 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 1343

Re: Using RPI with camera below 0 Celsius?

Starring for some long minutes at the board, I have some difficulties to believe that a film of condensation can compete with metals.

Do you want to say that water penetrates the USB/LAN chip and that there the damage is done?
by kaksi
Sat Jan 12, 2019 10:01 pm
Forum: General discussion
Topic: run win3.1 dos legacy software - not games
Replies: 4
Views: 362

Re: run win3.1 dos legacy software - not games

mdavid wrote:
Sat Jan 12, 2019 12:14 pm
I'm searching for a micro platform that I can use to run Win3.1 DOS legacy business software.
I briefly tried dBaseIII+/Clipper and Word for DOS under DOSBOX.

Works much better than under recent versions of Windows.
by kaksi
Fri Jan 11, 2019 6:43 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 1343

Re: Using RPI with camera below 0 Celsius?

I risked my RPI2 and was pretty unfortunate. Red and green LEDs on, but not seen on network. (About 6 below zero.) I believe it did not even boot - I am eager to consult the SD card, it is heavily logged. For how long time should I leave it inside before I power it on again? BTW, can someone explain...
by kaksi
Tue Jan 08, 2019 2:41 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 1343

Re: Using RPI with camera below 0 Celsius?

jdb wrote:
Tue Jan 08, 2019 2:33 pm
Was the Pi in an airtight enclosure?
No. Just shielded in a way it does not rain/snow on it.

(It run Jessie, so it was something like RPI3A.)
by kaksi
Tue Jan 08, 2019 2:23 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 1343

Re: Using RPI with camera below 0 Celsius?

HermannSW wrote:
Tue Jan 08, 2019 2:12 pm
From Pi 3B+ datasheet:
Environment: Operating temperature, 0–50°C
That's why I expressly specified in what temperature it had been. However, many people used it such an environment, i.e.

viewtopic.php?t=101351

What I am interested in are the risks.
by kaksi
Tue Jan 08, 2019 1:42 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 1343

Using RPI with camera below 0 Celsius?

I left my RPI keyless overnight outside by about -5 Celsius and it stopped working. Connected to a monitor, it seems to boot OK until I try to use the mouse/keyboard: they do not respond. Neither eth0 is working. The card works in another RPI, but if I take a perfectly working card from another RPI3...
by kaksi
Sat Oct 20, 2018 11:52 am
Forum: Beginners
Topic: Forget a Wifi Network and Ethernet
Replies: 7
Views: 587

Re: Forget a Wifi Network and Ethernet

How can I solve the read only problem? There are several options: 1) Many cards come with a 5 years warranty. My dealer always replaced them. 2) Format it in an (old) camera, navigator, Android... Needs a lot of luck. 3) Look for an utility on the manufacturer's site. 4) There are utilities on inte...

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