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by chwe
Sun Jun 23, 2019 12:19 am
Forum: General discussion
Topic: Drug testing using Raspberry Pi
Replies: 20
Views: 710

Re: Drug testing using Raspberry Pi

I think you've to tell more about your background before you can define a project and whenever it makes sense to solve these with a RPi or not. Basically there are two major concepts of drug (whatever we define as a drug) testings.. The immunoassay based ones (e.g. ELISA etc.) and the mass spec base...
by chwe
Fri Jun 07, 2019 12:02 am
Forum: General discussion
Topic: How many 2.5" drives?
Replies: 19
Views: 585

Re: How many 2.5" drives?

More than one power efficient SSD could work, but power requirements for SSD varies a lot, so it would depend on the drive models. and the used USB-SATA adapter.. One-HDD + one SSD is a "hit or miss" yeah.. let's add more cause more is better.. more data corruption due to things go worse over time ...
by chwe
Mon Jun 03, 2019 2:32 am
Forum: General discussion
Topic: snyology like raspberry pi?
Replies: 9
Views: 586

Re: snyology like raspberry pi?

but am not using those "fancy stuff" like OMV (OMV hates RPi) and Webmin (also tried it about a year ago) these systems add "overhead" which somewhat slows the system throughput ... My system above just use Raspbian Stretch, each HDD is shared via samba. Just a simple setup. It works for my needs. ...
by chwe
Sat May 11, 2019 11:20 am
Forum: General discussion
Topic: Raspberrypi 3 b+ use GPIOs to implement PICE function?
Replies: 9
Views: 318

Re: Raspberrypi 3 b+ use GPIOs to implement PICE function?

fruitoftheloom wrote:
Sat May 11, 2019 10:25 am
The OP stated PICE not anything else !!
maybe, just maybe the OP is not aware that there's an other solution for his problem? But right.. we don't like those solution based approaches right? It was never supposed that you find creative solutions such SBCs.. :lol:
by chwe
Sat May 11, 2019 10:03 am
Forum: General discussion
Topic: Raspberrypi 3 b+ use GPIOs to implement PICE function?
Replies: 9
Views: 318

Re: Raspberrypi 3 b+ use GPIOs to implement PICE function?

USB3 is an interface found on x86 PCs, display port is an interface found on x86 PCs, full speed GbE is an interface found on PCs... and you find all this stuff arm based boards if it's a must for you (and most of it also on MIPS based boards and.. surprisingly also on AMD64 :lol: ).. Sorry but PCIe...
by chwe
Fri May 10, 2019 11:24 pm
Forum: General discussion
Topic: Raspberrypi 3 b+ use GPIOs to implement PICE function?
Replies: 9
Views: 318

Re: Raspberrypi 3 b+ use GPIOs to implement PICE function?

pcmanbob wrote:
Fri May 10, 2019 10:04 am
As I could not find an interface called PICE I assume you meant PCIe which is an interface on an X86 pc.
it's not.. there are plenty of arm boards around supporting PCIe.. just not the RPi. ;)
by chwe
Fri Apr 26, 2019 6:23 pm
Forum: General discussion
Topic: SD Cards
Replies: 22
Views: 1228

Re: SD Cards

Amazon is very simple for refunds. I don't know if things are the same where you are, but I don't even have to package my returns or print a label. amazon doesn't even deliver to my country anymore.. :mrgreen: If an online shop has a proved working refund policy.. sure, there's no reason to buy it ...
by chwe
Thu Apr 25, 2019 11:53 pm
Forum: General discussion
Topic: SD Cards
Replies: 22
Views: 1228

Re: SD Cards

Cheaper £7.97 free uk delivery but yeah you can notice that it doesn't have the feel of the SanDisk you can see that in the last column of random writes and for its price not bad but slightly disappointing as many seem to give it rave reviews. most of those recommendations come from a time when the...
by chwe
Mon Mar 18, 2019 2:05 am
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1163

Re: Zero clusters? Pi day deals

hmm if the only reason to build a cluster is cause the bord is on discount.. then.. probably you should save the money.. :D The Zero is probably the worst SBC to build up a cluster.. if you build a display cluster you've to deal with all the mini HDMI and for everything involving calculation power.....
by chwe
Tue Feb 19, 2019 4:45 pm
Forum: Compute Module
Topic: Doubt related to the OTA update Mechanism for Debian Operating System
Replies: 20
Views: 1503

Re: Doubt related to the OTA update Mechanism for Debian Operating System

considering you don't update u-boot nor binaries provided by RPT to get the board booting.. Never saw someone repairing a broken u-boot OTA.. :P As someone dealing with a bunch of SBCs (most of them not RPis), tied to a distro which delivers (has delivered) kernel and u-boot updates via 'apt-get upg...
by chwe
Tue Feb 19, 2019 1:33 pm
Forum: General discussion
Topic: Using RPI with camera below 0 Celsius?
Replies: 27
Views: 954

Re: Using RPI with camera below 0 Celsius?

Leave it in a bowl of uncooked rice for a day or two. That can get rid of any moisture. which is a myth.. and IMO more harming than helping.. Yes moisture will be soaked up by 'dry rice', salts will stay there and soldered tin doesn't like electrolytes (even in 'mostly dry' form). Wash it with deio...
by chwe
Fri Feb 15, 2019 3:40 pm
Forum: General discussion
Topic: Weather station in freezing weather: questions
Replies: 17
Views: 734

Re: Weather station in freezing wheather: questions

A researcher at CERN managed to make one fail by getting too cold. It quit working at -180C. I can also dip my hand into liquid nitrogen, as long as it's only for a short time it won't even hurt me. But a -180°C experiment tells you nothing about durability at lower temperatures.. At least @DougieL...
by chwe
Thu Feb 14, 2019 8:34 pm
Forum: General discussion
Topic: Communication with multiple arduinos
Replies: 2
Views: 171

Re: Communication with multiple arduinos

Must it be a Arduino? Do you know ESP8266/ESP32 boards? there you could just send it over W-lan. How do you send your data wireless to the Pi (not decided yet, or not mentioned). Are your Arduinos planned to run on battery?
by chwe
Thu Feb 14, 2019 3:49 pm
Forum: General discussion
Topic: sd card characteristics
Replies: 11
Views: 490

Re: sd card characteristics

IMO only A1/A2 rated cards are worth in those days.. The price difference between outdated slow card and an A1 rated one in minor and for sure not worth it. You may be correct. My problem is that, for a lot of uses, I don't need a large card. I'm running many Pis on 8GB cards, and those simply don'...
by chwe
Wed Feb 13, 2019 7:18 pm
Forum: General discussion
Topic: sd card characteristics
Replies: 11
Views: 490

Re: sd card characteristics

IMO only A1/A2 rated cards are worth in those days.. The price difference between outdated slow card and an A1 rated one in minor and for sure not worth it.
by chwe
Tue Feb 12, 2019 8:31 pm
Forum: General discussion
Topic: install unrar nonfree on raspbian (Stretch)
Replies: 7
Views: 779

Re: install unrar nonfree on raspbian (Stretch)

Thank you @chwe, @rpdom, @DougieLawson for your help I have some how install it or so i think may be after fitting ever conner. I will list down all of the step please correct me if am wrong. I followed this link https://raspberrypi.stackexchange.com/questions/3617/how-to-install-unrar-nonfree sudo...
by chwe
Tue Feb 12, 2019 2:20 pm
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 33
Views: 1688

Re: Next raspberry ethernet?

So, none of them hit 1000mbits/s then. As I said. Everyone knows that the Pi is limited to its USB speed and that these devices are faster. That's not the point. The point is that all these devices are GigE, including the Pi, independent of the throughput. C'mon.. there's a significant difference b...
by chwe
Tue Feb 12, 2019 1:22 am
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 33
Views: 1688

Re: Next raspberry ethernet?

What are you not getting out of it ? Is it latency, response time, transferrate ? Or is it something else ? transfer-rate when needed.. If I don't care I go for an SBC without GbE. If I would ever buy a 3b+ I would probably cap it to full speed cause I don't want to deal with flow-control.. When me...
by chwe
Mon Feb 11, 2019 11:50 pm
Forum: Troubleshooting
Topic: Cannot SSH Into my Raspberry PI Zero W
Replies: 8
Views: 469

Re: Cannot SSH Into my Raspberry PI Zero W

You could run this bash command to find all devices on your network, in this example 192.168.0.0 is used: /bin/bash -c 'for a in {1..254}; do ping -q -c 1 -W 1 192.168.0.$a >> /dev/null && echo $a; done' or as everyone else using nmap for such a job.. nmap -sP 192.168.0.0/24 @Lasklo an USB-UART ada...
by chwe
Mon Feb 11, 2019 11:00 pm
Forum: General discussion
Topic: install unrar nonfree on raspbian (Stretch)
Replies: 7
Views: 779

Re: install unrar nonfree on raspbian (Stretch)

https://gist.github.com/chwe17/89db2526 ... 991761894f

now it's really a script and not only half of the stack answer he refereed to... It works assuming you're on raspian stretch.
by chwe
Mon Feb 11, 2019 10:08 pm
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 33
Views: 1688

Re: Next raspberry ethernet?

If you have a full HD display but 2/3 of it is always black, do you call it fullHD? Just ask for a friend.. Yes. If it is a true HD display. It may be that the device driving it isn't capable of full HD, but that is not the point. (I'll skip the overscan issue here because that isn't "2/3 of it"). ...
by chwe
Mon Feb 11, 2019 4:59 pm
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 33
Views: 1688

Re: Next raspberry ethernet?

Getting Gigabit Networking on a Raspberry Pi 2, 3 and B+ tl;dr You can get Gigabit networking working on any current Raspberry Pi (A+, B+, Pi 2 model B, Pi 3 model B), and you can increase the throughput to at least 300+ Mbps (up from the standard 100 Mbps connection via built-in Ethernet). that's ...
by chwe
Mon Feb 11, 2019 3:44 pm
Forum: General discussion
Topic: install unrar nonfree on raspbian (Stretch)
Replies: 7
Views: 779

Re: install unrar nonfree on raspbian (Stretch)

deb http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi # Uncomment line below then 'apt-get update' to enable 'apt-get source' #deb-src http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-fre$ i do not understand what to do next. if i add the line cat /etc/ap...
by chwe
Mon Feb 11, 2019 3:33 pm
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 33
Views: 1688

Re: Next raspberry ethernet?

I should add a caveat. There are many imgs available for the Tinker, for my tests I was trying to keep the OSs as close as possible. Rasbian being a Debian branch, it seemed appropriate to put Debian on the Tinker. TinkerOS is actually a fork of Debian ARMHF developed by Asus :shock: TinkerOS is no...
by chwe
Fri Feb 08, 2019 2:11 pm
Forum: General discussion
Topic: We've opened a shop!
Replies: 62
Views: 3351

Re: We've opened a shop!

"Computer firm", honestly I don't think of Raspberry Pi as a computer firm. "Computer firm" to me seems like something huge, the only thing I can think of huge regarding Raspberry Pi is the number of products sold. The raspberry pi is the third best-selling computer of all time after the PC and the...

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