[OpenTRV-dev] 'The' OpenTRV valve body.

[Damon Hart-Davis]

Hi Stuart,

> On 20 May 2015, at 07:40, Stuart Poulton <stuart at poulton.org.uk> wrote:
> 
> Damon,
> 
> Are you able to give any more details about the upcoming OpenTRV valve, for example.
> 
> * Size

Please look at the files in the SF repo under Arduino/V0p2_Main_PCB_REV7_DORM1_and_REV8.

There are schematics and STL of the valve.  I can measure our visual prototype for you!  It’s bigger than we’d like but the next round of production engineering will be about cost, size and looks.

> * Expected Battery Life

Still assuming 1Y with NiMH hybrid AAs (essentially limited by self-discharge) or 2Y with alkaline AAs.  Bo has figures that suggest 1Y with alkaline AAAs which would line up with those.

> * Firmware Update Mechanism

REV7/REV8 have the I2CEXT connector (well, with a slight tweak) for bootloading the AVR and further updates can be done over serial if required.

> * On board sensors

Ambient light, temp, RH%, plus of course the manual controls.

> Is there any code available that we can get our hands on to look at operational improvements, and contribute some feedback.

There is still not a lot of REV7-specific code in there since I need a functional device in hand to finish it, but that will mainly be motor driver.  There are various snapshots near the head with various improvements.  I can discuss those with you.

BTW, we’re happy to pop a REV7 board in the post to you when we have a batch in for you to prod and poke and comment on!

Rgds

Damon