Minimal design thoughts
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I haven't measured supply current, as I don't have the equipment to do that. I am looking at getting the uCurrent gold from eevblog, but it's expensive to import it to Denmark.
It will probably not be offered as a kit. Too much work from my/our part :-)
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Soo .. this like a breadmix ? :) All we have to add is the sensors ?
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You already got an ucurrent? I had planned to import an extra one from Australia for you :) (thought that we might be able to save some $ if we ordered 4-5 units).
But as so many other things i got away from it again :(
Unfortunately I only come to Copenhagen these days, visiting a client.
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"ATSHA204A sot23 footprint on board"
So does that mean this run will not have the ATSHA204A populated?
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@ServiceXp
We haven't started production yet, I'm still waiting for the latest prototype pcb to arrive from China, before I can make the (hopefully) last prototype before "mass production". Which also means I have to find the atsha204 somewhere, so I can test it.
And yes I know mouser has it, but I don't need that much more from them, so will have to pay a big handling/shipping fee to them
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@ServiceXp
We haven't started production yet, I'm still waiting for the latest prototype pcb to arrive from China, before I can make the (hopefully) last prototype before "mass production". Which also means I have to find the atsha204 somewhere, so I can test it.
And yes I know mouser has it, but I don't need that much more from them, so will have to pay a big handling/shipping fee to them
@tbowmo Have you looked on AliExpress. A quick search seems to suggest that could be a viable alternative. Try some different search combinations though ... their search engine sucks. "ATSHA204" wont find "ATSHA204A" for instance when I try.
Wont be quick though, and the Chinese New Year is coming up ...
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I can part with a SOT23 ATSHA204A if necessary. They can also be sampled from Atmel in small quantities for free (that's what I did).
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@hek It took three days from order confirmation to shipment notification. I don't recall the transit times but it went out with DHL WW Express so it should be pretty fast. Say 5-10 working days tops.
@Anticimex said:
@hek It took three days from order confirmation to shipment notification. I don't recall the transit times but it went out with DHL WW Express so it should be pretty fast. Say 5-10 working days
hmm what is the sample quantity limit?
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@Anticimex said:
@hek It took three days from order confirmation to shipment notification. I don't recall the transit times but it went out with DHL WW Express so it should be pretty fast. Say 5-10 working days
hmm what is the sample quantity limit?
@tbowmo I don't remember. But I got at least three (don't think I requested more since at the time I was not sure it would meet my personal demands, nor if the MySensors community would accept it). Since it is now kind of "official" I guess it has :)
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@tbowmo I don't remember. But I got at least three (don't think I requested more since at the time I was not sure it would meet my personal demands, nor if the MySensors community would accept it). Since it is now kind of "official" I guess it has :)
@Anticimex said:
@tbowmo I don't remember. But I got at least three (don't think I requested more since at the time I was not sure it would meet my personal demands, nor if the MySensors community would accept it). Since it is now kind of "official" I guess it has :)
ok, I'll try and get some samples then.
Has there been any work done to support easy initialization of the keys on new devices?
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@Anticimex said:
@tbowmo I don't remember. But I got at least three (don't think I requested more since at the time I was not sure it would meet my personal demands, nor if the MySensors community would accept it). Since it is now kind of "official" I guess it has :)
ok, I'll try and get some samples then.
Has there been any work done to support easy initialization of the keys on new devices?
@tbowmo That's already done. Available in development branch. I will update it to support devices without UART in the near future. Check libraries/sha204/examples/sha204_personalizer
Auto-generation of keys is supported as well as manually contributed ones (all devices in the same environment needs to share a key). All necessary personalization for MySensors usage is done (default settings are fine) and locking of both configuration and data sections are suppored (only configuration section is mandatory to lock). -
It's wit a separate sketch, right? Can we do anything in the protocol for key initialization? So when a device asks for a node Id it could also get the shared key supplied via radio?
I am thinking about creating a plug and play ready unit, with a preloaded sensor sketch from the factory in China, would be nice if people had an easy method of initializing things without reloading other sketches
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It's wit a separate sketch, right? Can we do anything in the protocol for key initialization? So when a device asks for a node Id it could also get the shared key supplied via radio?
I am thinking about creating a plug and play ready unit, with a preloaded sensor sketch from the factory in China, would be nice if people had an easy method of initializing things without reloading other sketches
@tbowmo short answer: no. Sending the key in clear text is out of the question. That is totally not secure. The whole idea with that circuit is that the key is prestored and hidden. Technically it is possible but then one also has to work around the payload size limitation in the rf protocol.
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