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by rln
Thu Apr 21, 2016 7:43 am
Forum: Troubleshooting
Topic: Prevent SD-Card Corruption
Replies: 241
Views: 244617

Re: Prevent SD-Card Corruption

You may be interested in my project Nard SDK. It prevents SD card corruption by simply not using it! Nard runs the entire OS from RAM. After bootup you can even remove the SD card and the system will continue to operate just fine.
http://www.arbetsmyra.dyndns.org/nard/
by rln
Wed Apr 20, 2016 8:27 am
Forum: Compute Module
Topic: Compute Module 3 Cluster
Replies: 20
Views: 21028

Re: Compute Module 3 Cluster

Your designs are clearly industrial :)
You may be interested in my SW project Nard SDK which is focused on HW like this. Raspberry Pi in embedded systems, running day and night for years in industrial systems.
http://www.arbetsmyra.dyndns.org/nard/
by rln
Fri Apr 15, 2016 9:42 am
Forum: Advanced users
Topic: NFS BOOT LAN interrupt = Pi dies
Replies: 3
Views: 837

Re: NFS BOOT LAN interrupt = Pi dies

What about not using NFS root but only /home or /usr/local as remote NFS shared?
by rln
Wed Apr 13, 2016 9:10 am
Forum: Other
Topic: Announcing Nard SDK v1.0
Replies: 0
Views: 449

Announcing Nard SDK v1.0

After two and a half years of development the Nard Linux SDK has reached version 1.0! Nard is the leading easy to use distro for low cost high, volume embedded Raspberry systems, such as home automation, IoT and industrial controllers. It is very reliable; designed from the ground up for years of 24...
by rln
Thu Mar 31, 2016 1:03 pm
Forum: Compute Module
Topic: Compute module boot time
Replies: 20
Views: 4613

Re: Compute module boot time

Then you at least know that the CPU powers up as it should. Likely it's a SW issue... You may perhaps want to try the "next" experimental firmware bootloader to see if that helps.
by rln
Thu Mar 31, 2016 11:38 am
Forum: Compute Module
Topic: Compute module boot time
Replies: 20
Views: 4613

Re: Compute module boot time

What about checking with an oscilloscope or logic analyzer, on the module signals EMMC_CLK and EMMC_CMD?
by rln
Thu Mar 31, 2016 9:29 am
Forum: Compute Module
Topic: Compute module boot time
Replies: 20
Views: 4613

Re: Compute module boot time

Check the GPIO47 and ensure it's not in "alternate" boot mode, as stated in the I/O board schematic.
by rln
Wed Mar 30, 2016 11:22 am
Forum: Other
Topic: Nard v1.0 in beta, help testing?
Replies: 0
Views: 340

Nard v1.0 in beta, help testing?

Hi After 2.5 years of development Nard SDK is almost ready for the version 1.0 release! A beta is out now and I wonder if could get some help testing it? Nard SDK is an OS for embedded systems Raspberry Pi. Being lite, robust and running entirely from RAM it enables controllers to run 24/7 for years...
by rln
Wed Feb 03, 2016 9:39 pm
Forum: Advanced users
Topic: Raspberry Pi sd card issues
Replies: 5
Views: 1246

Re: Raspberry Pi sd card issues

First of all, nothing is 100% when it comes to software... However, going one step beyond read only would be to never accessing the SD card at all. This is how my Nard SDK works. The OS run from a RAM disk, so the SD card is only used during bootup and then never touched again. http://www.arbetsmyra...
by rln
Thu Jan 28, 2016 10:31 am
Forum: Advanced users
Topic: 24x7x365 Products using RPI2-How to get rid of Kernel Panic
Replies: 7
Views: 1078

Re: 24x7x365 Products using RPI2-How to get rid of Kernel Pa

Hi
How often and how much data is written to the USB flash? Is it possible that you have weared it up? Have you tried with USB sticks of different brands?
by rln
Fri Jan 22, 2016 10:15 am
Forum: Compute Module
Topic: Offset filesystem on compute module
Replies: 1
Views: 621

Re: Offset filesystem on compute module

Hi
I suggest you simply put the version data in an ordinary file in the filesystem. After uploading an image to the flash you can mount the module fs and add files.
by rln
Wed Jan 20, 2016 2:11 pm
Forum: Bare metal, Assembly language
Topic: Does RPi2 honor "kernel_address"?
Replies: 6
Views: 2040

Re: Does RPi2 honor "kernel_address"?

By default the firmware inserts some startup code at 0x0 and inserts the kernel ATAGs at 0x100. Actual kernel is loaded at 0x8000. Add kernel_old=1 to avoids prepending the boot code. Add disable_commandline_tags=1 to avoid populating the ATAGs. Set both of those and your kernel will be loaded at 0...
by rln
Sat Jan 16, 2016 10:52 am
Forum: Other
Topic: List of Minimal OSes
Replies: 7
Views: 1940

Re: List of Minimal OSes

There is also Nard SDK which is very light. It's different from Raspbian but offers Raspbian emulation for those special packages you just can't live without.
http://www.arbetsmyra.dyndns.org/nard/
by rln
Thu Jan 07, 2016 9:38 am
Forum: Advanced users
Topic: Multiple Partitions on an SD card
Replies: 13
Views: 6308

Re: Multiple Partitions on an SD card

tutorial on how to create multiple partitions on a Raspberry Pi SD card. I am looking to run my Pi with a read only operating system but have a small partition with read/write access. Hi My project Nard SDK has most of what you need. Designed for embedded products, read only, reliable and a separat...
by rln
Fri Nov 27, 2015 10:16 am
Forum: General discussion
Topic: Raspberry Pi for industry
Replies: 10
Views: 2530

Re: Raspberry Pi for industry

I've searched into the forums but I'm not able to find official answers about: - Long-term-availability guarantee; - Industrial qualifications, eg shock, temperature, EMI. Hi I've collected some "industrial" answers on my site. http://www.arbetsmyra.dyndns.org/nard/answers.html#reliability Lots of ...
by rln
Sat Sep 26, 2015 9:40 pm
Forum: Compute Module
Topic: Disable recovery mode?
Replies: 4
Views: 2936

Re: Disable recovery mode?

If the card has NOOBS are you adding it to the correct, active config.txt?
Hold the [SHIFT] key while you boot and use the NOOBS recovery system config editor to add it.
Thanks for the suggestion, but this is an embedded system. It's headless and has only one config.txt.
by rln
Fri Sep 25, 2015 8:07 am
Forum: Compute Module
Topic: Disable recovery mode?
Replies: 4
Views: 2936

Re: Disable recovery mode?

rpdom wrote:Add "avoid_safe_mode=1" to your config.txt file.
I already have. It makes no difference.
by rln
Thu Sep 24, 2015 12:20 pm
Forum: Compute Module
Topic: Disable recovery mode?
Replies: 4
Views: 2936

Disable recovery mode?

Hi
At startup the Compute Module reads GPIO47_1V8 and if low perform an alternate boot (executes recovery.elf instead of start.elf). Can this be disabled? Thus ignoring GPIO47_1V8 state?
by rln
Thu Sep 24, 2015 8:46 am
Forum: Other projects
Topic: Industrial Case Needed
Replies: 6
Views: 6358

Re: Industrial Case Needed

Perhaps "duinoCase-B+" (just google it)? I think metal cases are rare due to they cost to much. In general they cost more than the RPi itself.
by rln
Wed Sep 23, 2015 8:57 am
Forum: Troubleshooting
Topic: Totally frustrated trying to set up Headless WiFi
Replies: 75
Views: 12984

Re: Totally frustrated trying to set up Headless WiFi

I'd suggest to temporarily connect a monitor and a keyboard to do fault searching locally. However, secondly you may wan't to try the Nard SDK example image to see if that works better. Nard has easy headles WiFi setup. Just add the password in the file /settings/network in the FAT partition (can al...
by rln
Tue Sep 22, 2015 1:47 pm
Forum: General discussion
Topic: Robust Read Only RPi
Replies: 8
Views: 1903

Re: Robust Read Only RPi

> Its my understanding that when a dismount is called the cached data will > be written to the drive before dismounting Yes, that is correct. > I guess after the dismount the flash drive is in idle mode, so it will not > be performing background house keeping and wear leveling No one knows! The USB ...
by rln
Tue Sep 08, 2015 11:50 am
Forum: Advanced users
Topic: What is the lightest Raspberry-compatible Linux distro?
Replies: 8
Views: 4978

Re: What is the lightest Raspberry-compatible Linux distro?

I want a command-based (no GUI) lightest Linux distro to boot ultrafast, but also to deal with bluetooth and sensons like CO2 sensor I don't recommend either, but I suggest you research raspbian-ua-netinst and DietPi as a basis for your solution. There is also my Nard SDK which is specifically dest...
by rln
Tue Sep 08, 2015 11:32 am
Forum: General discussion
Topic: Raspberry Pi Industrial use -40C
Replies: 9
Views: 3267

Re: Raspberry Pi Industrial use -40C

Heater wrote:And where is the temp spec of the compute module?
Compute Module withstand -25° to +80° C
http://www.arbetsmyra.dyndns.org/nard/a ... eliability
by rln
Wed Jul 29, 2015 8:35 pm
Forum: Troubleshooting
Topic: Prevent SD-Card Corruption
Replies: 1
Views: 300

Re: Prevent SD-Card Corruption

Hi
You might be interested in my project Nard SDK which relieves the SD-card and is intended for embedded systems.
http://www.arbetsmyra.dyndns.org/nard/
This would of course require the OS to be replaced though, but it can be done remotely.
by rln
Wed Jul 29, 2015 8:13 pm
Forum: General discussion
Topic: Headlessly Configuring Wifi
Replies: 7
Views: 1351

Re: Headlessly Configuring Wifi

You could add a small Bluetooth serial port (SPP) dongle to your device. With a smartphone you can then scan for it when nearby and send some data to it. (I know it's not pure sw-only but not far from. A BT dongle is usually affordable.)

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