[TriEmbed] (Amazon) Dash FCC info and model corrections

[Michael Monaghan]

Warning: Speculation based on rumors ahead ->

I've read a ton while waiting for tools to compile.  The crib notes:

All _dash_ buttons will be migrated to V2 hardware.  Those still shipping
V1 were just slow movers or produced right before hardware changeover.

The IoT V1 is identical hardware to the dash V1 but the firmware is
different as it allows for three states...  Short Press, Long Press, and
Double Click to be communicated to the server.  Dash Buttons _supposedly_
only do short press.

The IoT V2 is supposed to be unique hardware from the V2 dash, however
re-reading, that is speculation based on the rumor the battery will be
replaceable.  As we know now, the Dash V2 hardware has a replaceable
battery if you break the seal.  Maybe it will have a different case to
allow access to the battery, or maybe someone at Amazon or the mfr. let
loose when they saw the battery holder and there are no plans to give end
users access.  Regardless, if they keep the tri-state button, it would make
sense to have different firmware.

It feels better to have that on the outside.  (lol)

On Tue, Jul 26, 2016 at 2:06 PM, Shane Trent via TriEmbed <
triembed at triembed.org> wrote:

> Pete,
>
> My Amazon AWS IoT button arrived yesterday (ordered back in May). It
> appear to be sealed like the other Dash Buttons. Below is a photo of the
> back showing the model number, which I believe matches the rev 1 Dash
> Button. Again, I wonder why they used rev 1 hardware for the AWS IoT
> button. Will the other Dash Buttons all migrate to rev 2 and keep rev 1
> with the lithium battery for the IoT Buttons?
>
> Shane
>
> [image: button front small.jpg]
>
> [image: button model number.jpg]
> On Tue, Jul 26, 2016 at 1:52 PM Pete Soper via TriEmbed <
> triembed at triembed.org> wrote:
>
>> (excuse the repetition, but this will avoid complete bewilderment if
>> somebody starts reading about the subject at this point)
>>
>> The rev 2 Dash button labeled "JK29LP" on the back has a replaceable
>> battery if the bottom piece of plastic is cut off. It's in a dead-plain
>> battery holder (AAA alkaline). It has Atmel MCU and radio, and is currently
>> opaque with respect to redoing it's firmware. The rev 1 one labeled
>> "JK76PL" has a lithium battery that is welded to PCB connections, with ST
>> MCU and Broadcom radio that is as easy to program as an EMW3162 ('cause the
>> hardware is identical!). Instructions for the firmware programming of a rev
>> 1 are on Adafruit
>> <https://learn.adafruit.com/dash-hacking-bare-metal-stm32-programming/overview>.
>> IMO it would be close to trivial to replace the welded on lithium battery
>> with a connector for an alternative battery. As Shane pointed out, the rev
>> 2 is more power efficient to compensate for the wimpier battery.
>>
>> Unless I'm mistaken the IoT button won't be shipped until August 23rd.
>> I'd bet a box of donuts it's based on, if not the same rev 2 Dash guts,
>> something very very close. The AWS web page
>> <https://aws.amazon.com/iot/button/> describing it says this and the
>> picture makes it seem identical on the outside, but looking closely at the
>> picture I see where the removable bottom piece allows getting to the
>> battery holder. This convenience is not worth $15. :-) It makes perfect
>> sense for the Dash buttons, which would ordinarily be used at most a couple
>> dozen times a YEAR, to have the bottom sealed. But with an app that calls
>> for multiple button pushes a day there may be an issue. If the guys doing
>> the Dash teardowns can figure out how to swap the IoT button firmware into
>> a rev 2 Dash button, they'll no doubt publish that. In the meantime, my
>> wagon is hitched to the rev 2 Dash buttons with the intention of replacing
>> the top layer of firmware while also playing with the ARP-detection angle
>> for simple functionality.
>>
>> One specific goal is to get arpalert installed on the Splatspace server
>> and  donate a button or two for experimentation there. I can think of
>> multiple immediate uses for these buttons at Splatspace, but also think
>> blocking their access to Amazon will be desirable.
>>
>> -Pete
>> On 07/26/2016 12:39 PM, Michael Monaghan wrote:
>>
>> Shane,
>>
>> If I understand correctly the Amazon IoT button has different hardware
>> than the Dash button, including a "user replaceable" battery.  The firmware
>> is a bit different as well.  Of course at $20 a pop, one has a little
>> different expectations.
>>
>> Mike
>>
>>
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>
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