mboehmer

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  1. Like
    mboehmer got a reaction from NicoD in Rock PI 4   
    Some news:
     
    https://wiki.radxa.com/Rockpi4/downloads
     
    There is a first Armbian image available.
  2. Like
    mboehmer got a reaction from Igor_K in Thanks for the fish!   
    Hi guys,
     
    finally, paper is finished, and for anyone interested it can be found here on the arXiv site
    Be warned, it concentrates on the physics, not the electronics
     
    Michael
  3. Like
    mboehmer got a reaction from 062621AM in Rock PI 4   
    Sorry, no link, it was direct contact with the German distributor by phone (and some luck, talking about my specfifc requirements).
  4. Like
    mboehmer got a reaction from sfx2000 in Thanks for the fish!   
    It is a research program, one of our professors from TU Muenchen cooperates with the Canadians (who operate the sub sea infrastructure).
    The goal of this setup was to measure water quality in North Pacific (more specific, this special site) by deploying some light emitters and light detectors on two strings.
    We want to learn about bioluminescence and radioactivity induced light, which both are kind of noise for the measurements intended later.
    Let's say it like this: it's dark there, really, you have a perfect stable temperature, and it's easier to get things there (and back again) than going for deep holes in ice.
     
    Moreover, we had to learn all necessary things about sub sea technics in a short period of time, including deployment technis (thanks to one guy supporting us, we made the job).
     
    The setup is still operational (which I call success), and with some luck we will extend it with a third string next year, including some Odroid C2 based setups and (as we go for real fibre that time instead of good ol' copper lines) some more sophisticated electronics.
     
    As soon as our paper is published, I can give more details (while I "just" did the electronics, there will be some more physics included )
  5. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  6. Like
    mboehmer got a reaction from Igor_K in Thanks for the fish!   
    Hi guys,
     
    finally, paper is finished, and for anyone interested it can be found here on the arXiv site
    Be warned, it concentrates on the physics, not the electronics
     
    Michael
  7. Like
    mboehmer got a reaction from NicoD in Rock PI 4   
    Hi all,
     
    a new RK3399 board appeared, it is called RockPi4
     
    I have two of these beasts here already, and they works nicely - I like the small details about it (nice eMMC fixture, all heat plates on the bottom side for simple cooling, and an M.2 PICe slot for my second network card
    Do you see any chance to get Armbian working on that beast, and if so, what can *I* do (with my limited experience in kernel programming)?
    Debian is working on it already, in case you need more specific information please let me know.
     
    Any help is appreciated.
     
    So far, Michael
     
  8. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  9. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  10. Like
    mboehmer got a reaction from sfx2000 in Thanks for the fish!   
    It is a research program, one of our professors from TU Muenchen cooperates with the Canadians (who operate the sub sea infrastructure).
    The goal of this setup was to measure water quality in North Pacific (more specific, this special site) by deploying some light emitters and light detectors on two strings.
    We want to learn about bioluminescence and radioactivity induced light, which both are kind of noise for the measurements intended later.
    Let's say it like this: it's dark there, really, you have a perfect stable temperature, and it's easier to get things there (and back again) than going for deep holes in ice.
     
    Moreover, we had to learn all necessary things about sub sea technics in a short period of time, including deployment technis (thanks to one guy supporting us, we made the job).
     
    The setup is still operational (which I call success), and with some luck we will extend it with a third string next year, including some Odroid C2 based setups and (as we go for real fibre that time instead of good ol' copper lines) some more sophisticated electronics.
     
    As soon as our paper is published, I can give more details (while I "just" did the electronics, there will be some more physics included )
  11. Like
    mboehmer got a reaction from chwe in Thanks for the fish!   
    Issue solved, btw. A wrong capacitor was mounted on our power supply assembly (SMD, unmarked).
    We got a small dip on +5V rail, disconnecting the USB ethernet adaptor. It was reenumerated, but in brown out, so the USB interface showed up again, but the network part was dead.
    Changing the capacitor, and adding some smart power regulation for another switched load fixed the issue.
  12. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  13. Like
    mboehmer got a reaction from fossxplorer in Thanks for the fish!   
    Short update... we seem to have kind of network trouble with the 1GbE ethernet port of Odroid C2.
    It seems to "die" after some time, more or less the same way on all five Odroids.
    Is there any known issue with the network kernel driver?
     
    Still investigating the circumstances, and can provide more debugging info if needed.
     
    Any help/hint is appreciated.
  14. Like
    mboehmer got a reaction from fossxplorer in Thanks for the fish!   
    No compass or GPS. You see a picture from the videostream taken by the ROV, which made optical inspection after deployment and attached cablings afterwards. The ROV uses GPS coordinates from the mother ship, and corrections made by sonar system.
    The module itself carries no GPS, as obviously, there is no signal down there - nevertheless, we use a compass chip (MC6470) to measure orientation inside gravitational field or earth and hopefully also inside magnetic field (depends on how well that works inside the Titanium housing).
  15. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  16. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  17. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  18. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  19. Like
    mboehmer got a reaction from TonyMac32 in Thanks for the fish!   
    Hi guys,
    some months ago I implemented an Odroid C2 as readout controller for a scientific instrument.
    Lot of people were kind and helped me with some problems with Armbian, especially eMMC and PWM.
     
    Today, finally, we managed to have our instrument (two strings with several Odroid C2 and other stuff) deployed.
    It is sitting now at 2628m depth in the Pacific Ocean, and will go operational the next days.
     
    Here we are... I think I can announce the deepest Odroid so far (cry loud if I'm wrong :) )
    In the picture you just can see the Titanium housing with two glass covers attached to the string.
     
    Again, thanks for the fish :)
     
    Michael

  20. Like
    mboehmer got a reaction from TonyMac32 in Success on C2 / stretch   
    Hi guys,
     
    after some interesting weeks, I could successfully install eight Odroid C2 together with dedicated FPGA hardware now, and prepare them now for deep sea operation.
     
    Just wanted to express a big "THANK YOU" to all here in the forum which were involved in helping me to get the beast working.
     
    The boards operate now with patches inside Uboot (serial console 9600 8N1) and several small patches inside the kernel (device tree, PWM, ADCs, 1Wire), and a patch inside the rt8152 driver to switch off the LEDs in the USB ethernet dongle (PMTs don't like such bright light usually). 128GB eMMCs are working fine, thanks to the speed patch
     
    The Armbian image does a great job, it's a pleasure to work with. At the moment I run it headless over some DSL connection, with a SSH tunnel and TigerVNC to remotely operate it and test under hard conditions
     
    Again, thanks to all persons involved.
     
    BTW, I'm open for ideas on how to save power on C2 during operation, as well as how to read CPU temperature remotely - we have 22W max power dissipation inside the Titanium shell... every Watt counts.
     
    BTW2, how can I take the kernel image out of updates? I want to use apt-get for normal packages, but hands off the kernel
     
    So far, Michael
  21. Like
    mboehmer got a reaction from TonyMac32 in Success on C2 / stretch   
    Hi guys,
     
    after some interesting weeks, I could successfully install eight Odroid C2 together with dedicated FPGA hardware now, and prepare them now for deep sea operation.
     
    Just wanted to express a big "THANK YOU" to all here in the forum which were involved in helping me to get the beast working.
     
    The boards operate now with patches inside Uboot (serial console 9600 8N1) and several small patches inside the kernel (device tree, PWM, ADCs, 1Wire), and a patch inside the rt8152 driver to switch off the LEDs in the USB ethernet dongle (PMTs don't like such bright light usually). 128GB eMMCs are working fine, thanks to the speed patch
     
    The Armbian image does a great job, it's a pleasure to work with. At the moment I run it headless over some DSL connection, with a SSH tunnel and TigerVNC to remotely operate it and test under hard conditions
     
    Again, thanks to all persons involved.
     
    BTW, I'm open for ideas on how to save power on C2 during operation, as well as how to read CPU temperature remotely - we have 22W max power dissipation inside the Titanium shell... every Watt counts.
     
    BTW2, how can I take the kernel image out of updates? I want to use apt-get for normal packages, but hands off the kernel
     
    So far, Michael
  22. Like
    mboehmer got a reaction from TonyMac32 in Success on C2 / stretch   
    Hi guys,
     
    after some interesting weeks, I could successfully install eight Odroid C2 together with dedicated FPGA hardware now, and prepare them now for deep sea operation.
     
    Just wanted to express a big "THANK YOU" to all here in the forum which were involved in helping me to get the beast working.
     
    The boards operate now with patches inside Uboot (serial console 9600 8N1) and several small patches inside the kernel (device tree, PWM, ADCs, 1Wire), and a patch inside the rt8152 driver to switch off the LEDs in the USB ethernet dongle (PMTs don't like such bright light usually). 128GB eMMCs are working fine, thanks to the speed patch
     
    The Armbian image does a great job, it's a pleasure to work with. At the moment I run it headless over some DSL connection, with a SSH tunnel and TigerVNC to remotely operate it and test under hard conditions
     
    Again, thanks to all persons involved.
     
    BTW, I'm open for ideas on how to save power on C2 during operation, as well as how to read CPU temperature remotely - we have 22W max power dissipation inside the Titanium shell... every Watt counts.
     
    BTW2, how can I take the kernel image out of updates? I want to use apt-get for normal packages, but hands off the kernel
     
    So far, Michael
  23. Like
    mboehmer got a reaction from TonyMac32 in Odroid-C2: diet pi ok, armabian ko   
    Just as a remark: I use eight of the 128GB eMMC modules now on eight C2 setups for some days now, without any problems.
    I have "ARMBIAN 5.41 user-built Debian GNU/Linux 9 (stretch) 4.14.26-odroidc2" systems with the speed patch included.
     
    Before speed patch these eMMCs were a "no go" with Armbian, while smaller ones (16GB usually) worked like a charm.
     
    Michael
  24. Like
    mboehmer got a reaction from Igor in C2 64GB eMMC no login   
    First quick test with patch: seems to work, Armbian installation and logins worked, as well as pass word changes for root.
    Meanwhile I copy a huge ZIP file for checking data integrity to 64GB eMMC.
     
    Looks good so far
     
    Thanks for that patch.