Posts made by Theodore Borromeo

@Carlos-Sancho Than you should cycle through different colors and think about duty cycles. Do you absolutely need it on ALL THE TIME? Perhaps you can add a pushbutton to bring up a reading? In industrial plants that I've seen, this is what they do as constantly replacing LCD screens (or bulbs, depending on the age of the equipment) gets terribly wasteful and expensive.

And since it is the internet we're connected to, perhaps have an always on message bus, with the screen displaying when the pushbutton is pressed to compare network connectivity. It'd be a quick way to verify that your code or the network hasn't gone stale from a remote monitoring station, and it'd also protect you from burn in.

A final alternative is to add scrolling animations, or cycle which measurement is scrolling via above pushbutton.

Basically, add a button as a "JIT" duty cycle enabler. You'll be happier you did, and you don't even need to write software to create an electronic interrupt using a BJT or whatever. It'd be a nice experiment in low cost/low power/no code solutions.

Errrr, couldn't you utilize: https://onion.io/store/arduino-dock-r2/ ?

It seems that you would then get the maximum response from your sonar, and then shuttle the data from the arduino chip one to the omega. For around $25 (20 for the dock, and around 4-5 for the sensor) you could get this done much in the same way you have before, without having to depend on linux timing being a bit inadequate for the task.

@Luciano-S. I know that that can be done, but there should be a JavaScript button I can press to copy that info to my clipboard as well, right? Total convenience function, but it'd be nice if it's not too much trouble.

@Bas-Rijniersce I think settings.uiHost is the only place you can set the listen path. This may be an issue of your configuration file not being loaded with the same permissions as node-red is run as?

I good way to check is to see if changing the uiPort in the the settings file will be respected as well. Have you tried setting the listening port via the command line and then via the settings file? What command are you using to start node-red?

@Chris-Stratton I have never seen swap pushed that far, or assumed to be that efficient on any embedded system. I think, though, that you've seemed to answer the question with your suspicion on SD card performance. Have you tried class 10 cards on a 2plus? the other option is the max size command, which seems to work for some.

@Bas-Rijniersce also, swap space only moves data out of ram based on LRU, it doesn't take away the fact that while in operation, an entire program generally needs to be resident in memory. this would mean that node.js, libv8, and node red at least ( and that's not counting whatever lib you are going to put on to run the web front-end, if at all)

@Bas-Rijniersce no problem. I did mean ram, as I don't know what the swap space size is set at for the omega 2. also, turns out that node red is only built out for omega2, so it's def not an architectural issue. This all makes me wonder why yours is not working when the tutorial seems to imply this should work out of the box. . .

@Bas-Rijniersce
http://nodered.org/docs/hardware/raspberrypi.html

The article above talks about starting node red on a pi such that memory is culled at 256MB! There's also mention of how you can (and should) set the limit at which node.js and node-red begin memory reclamation.

@Lazar-Demin @Boken-Lin : do you all intend to set the node.js memory limit in the omega openwrt package itself?

@Bas-Rijniersce now that I actually look at the error messages it seems that you need to reduce the size of your base image. Even still, node red might just be taking up the remainder of your 64MB of memory despite that.

@Bas-Rijniersce I think that you need to have the mipsel architecture version for omega2 to work. I believe your running node-red version meant for original omega (which was just MIPS).

see:
https://www.google.com/amp/blog.thestateofme.com/2014/12/03/node-red-on-wrtnode/amp/?client=ms-android-google

I was looking at:
http://community.onion.io/topic/1467/resolved-image-lcd-where-does-the-cloud-app-save-the-file-on-the-system

and I noticed it was marked as RESOLVED by pointing to another thread here:
https://community.onion.io/topic/1281/oled-pics-scrambled

If you'll notice, there is no way to get a permalink to a specific comment. Can this feature be added to the forums itself?

hmmm, seemed to have found this.
https://github.com/openwrt/packages/blob/d45c0f1ac01b721fd70c16c1540bc6b39628a4f6/lang/python3/files/python3-package-dev.mk

Now I have to figure out how I can just have a base image in the cloud compile include this so that the source can be tested on Onion,Inc's build machines and pushed for testing. That would greatly reduce compile and debug time.

Now I need to figure out where I get python3-dev so that we can port the python bindings to python3 as well. . . I am pretty sure the feeds that opkg subscribes to contain what packages opkg knows about and can get, but where can I find that on the web? Do they not have an online listing of feeds for OpenWRT/LEDE?

@WereCatf no doubt. the idea that it's an option just takes me back to the glory days of mask ROMs on a SNES cartridge ( I am NOT old enough to be hearkening back that far). recently someone did it with the flash memory on an iPhone, but I totally don't intend for anyone to go that far.

I honestly thought that this would have been the major revision with the omega2s over the omegas. I honestly wished that they would have made a much larger leap in processing power and memory just based on the immediate limitations on the original once it became clear that it kind of didn't deliver out of the box expectations w.r.t. node.js etc.

It's interesting to see where omega is supposed to thrive though, based on the price point and feature sets. I honestly hope they abandon their current course and pivot to open hardware with integrated node red. They could then focus on creating a handheld PC like the pocket chip ( or partnering) that could communicate with the omega wifi ap to program things offline, with tutorials embedded into the 'host' computer. if each kit were under $100, they could kick-start or have local schools launch go fund mes to purchase kits for local schools.

as a side note, it'd be an interesting company to start that templates GoFundMe campaigns for local schools/organizations. you could reuse a lot of the base work to commoditize projects, and then make your profit by minimizing overhead via spreading the development cost over the multiple campaigns. I don't think there is any organization now that will help you fundraise in that way, barring what little I know about classy. . .

@Costas-Costas th slicer has the right approach: compile a minimal kernel and see if that helps

@Ruslan-Baryshnikov don't think so, though this maybe a good candidate for ardupilot. . .

@Costas-Costas fair enough, though in all fairness, I don't ever think that what I suggested should be the case :). I think that you need a USB stick with pivot overlay solution, or get the 2plus with a built in sd card ( I purposely got that one after dealing with this on the first omega)

@Costas-Costas solder on a larger flash chip and configure the dts files for your larger memory?