Gateway device
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Yes the Atmega32U4 and Atmega328 has in the RAM their main problem, in our case we run smoothly in the 2KBytes available because we don't use ASCII in the protocol, but binary only.
Then the board is for as a remote sensor node, running on battery, not a main gateway board.
In any case, the board that you are designing will work nicely also with Souliss.
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nothing's too late (yet). I haven't even ordered the first prototype batch yet. Still ironing out some details, and routing the PCB (I have only scratched the routing for the 10th time or so :s ). Actually I had thought about adding a couple of mounting holes in the board..
I'll see if the boxes that I have, resembles the one that I just linked to.. (I've talked with @hek about finding some enclosures a couple of days ago, when we suddenly found a seller on ali express, that only had enclosures of various kinds).
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very nice board, bravo !
thank you for sharing your work and knowledge. -
@tbowmo My hat is off to you, for the major effort put forth along with @blacey ,@Anticimex , @axillent and @hek to name but a few.
While following this thread at times lost (mostly?) with explanations and concepts I have been learning which is half the battle.
It seems it never too late for a old dog to learn a little.
However it seems there is a need for a better gw from some of the threads I have read.
I for one will purchase a unit in what ever form it morphs into.Great work with all these boards.
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A small update here, on an even larger update on the gateway device.
After some considerations, I have decided to switch the MCU for the GW to an atmel SAM D21G, instead of atmega1284. While doing this I have reduced the BOM for the GW, and cut about 1/3 of the BOM price.
The D21G is the same chip that's on the new arduino zero, and also on a kickstarter project called neutrino. @blacey is the one who pointed me in that direction :)
While being a more powerful chip (256kb flash, 32kb ram, 48 MHz, loads of extra peripherals) it is actually cheaper than the atmega1284, and it has build in USB controler, so the ftdi chip could be removed, a couple of other glue components is also gone now.
It will mean that we have to work a bit harder at getting mysensors running, but since the MCU is supported by arduino, we should be able to manage.
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very interesting! I didn't know neutrino, pretty nice board. Seems there will be some work on software part but it is doable like you said. And you will have more power, which is nice for the GW I think, and I like when chip is usb compatible (like pic18f4550 ...). Maybe one day, it will become HID, lol!
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I didn't know of the neutrino (or arduino zero) before @blacey mentioned it to me, and he finally got me convinced that I should swap the atmega1284. (I know that @axillent tried to convince me to use another chip, than the atmega, before.. But when you find this, and it can reduce board complexity..)
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@tbowmo: it is likely same things for me. lots of 8/16bits chip collection (microchip). but never moved to 32bit even if i have a 32bit usb bit wacker (not time to test it). I was thinking that you can do lot of things with 8bit chips. So yesterday, I have read a little the datasheet atsamd21. Wow, 1077 pages! But there is lots lots of features! I think I will try to order one sample for my collection! Plus, these chips seems to be not expensive but there is some learning curve on it. I think Microchip have missed a big move with arduino platform!
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That right there is a work of art!
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You may be interested in this Arduino shield:
http://www.ebay.com/itm/WireLess-Gate-Shield-DIY-Maker-Seeed-BOOOLE-/171713943896?hash=item27faf2d958It has both NRF24L01+ and RFM69HW radios.
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The first pcb's have arrived today.
They came a bit faster from dirtypcbs.com, than I had expected. So haven't even sourced the components yet.
So need to look into that the next couple of days.
with W5100 / NRF module "mounted" :
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@ServiceXp
As we need to bring things to life on a new MCU core (Cortex M0), I decided to just make a "simple" dev board, without holes. They will probably be added on the next iteration of the board. (Besides that, 3 of the corners are a bit crammed with components, so no place for the holes anyway.)
