<div dir="ltr">Hi all<div><br></div><div>You are receiving this email because you signed up to the OpenTRV interest list. Please be aware that there is a way to unsubscribe from this list at the bottom of the <a href="http://lists.opentrv.org.uk/listinfo/opentrv-interest">OpenTRV interest list page</a> </div>
<div><br></div><div><div>We are putting together a production run of prototypes (engineering samples) this month. We are inviting interested people to participate at cost and receive populated boards. However, in order to take part please be aware of the following caveats:</div>
<div><br></div><div>1) You will potentially have to bootload your own AVRs. This implies that you have at minimum an FTDI cable and some way of setting some pins, such as breadboard and jumper wires.</div><div><br></div>
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2) The Conrad valve actuators <a href="http://goo.gl/FrS48M">http://goo.gl/FrS48M</a> are a necessary extra, 1 per radiator you want to be able to control. In the UK they are £30.99 each plus shipping.</div><div><br></div>
<div>3) Next year we plan on producing our own radio controlled radiator valve actuator (i.e. a replacement for the Conrad valves) at a cheaper price. Our new valves will not use the radio protocol of the Conrad system as their primary protocol, although we certainly hope to be able to, but can't guarantee to, continue to support systems using Conrad valve actuators. Therefore you will be buying some Conrad valve actuators and OpenTRV controllers that will potentially not be supported by a revised OpenTRV system next Winter.</div>
<div><br></div><div>4) Our best estimate is that the OpenTRV controllers will cost just under GBP40+VAT per unit. It may be higher or lower than this.</div><div><br></div><div>5) We've experienced 20% out of the box failure rate with the last run of controllers. Whilst it may well be possible to nurse a failed controller back to life, this may take you some effort should you be unlucky enough to receive a unit that passes the POST (Power On Self Test) but will not work in everyday use.</div>
<div><br></div><div>6) We're not supplying boxes for these. You can 3D print your own using the OpenTRV design (being updated for the new revision at the moment) or make your own - I'm really tempted to make one from Lego myself.</div>
<div><br></div><div>7) You will need to wire this into your boiler or in parallel with your existing thermostat connection yourself. We can suggest how to do this (this is the component we're using <a href="http://goo.gl/iTvXFc">http://goo.gl/iTvXFc</a> ) but if you're not confident about this part you'll need to find someone yourself to help you.</div>
<div><br></div><div>8) Should we get a ridiculous amount of interest in this, we may have to restrict the availability. Honestly, we don't expect that to happen, although it would be a nice problem to have :-)</div><div>
<br></div><div>OK, that's the bad news out of the way. The good news is that this is an opportunity to join in with the project on an at cost basis and help out with furthering the aims of the project.</div><div><br>
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<div>You can use the OpenTRV controllers and Conrad actuators to get going on your whole house home automation project and when put into context with the proprietary nature and expensive costs of alternatives, this offer to join in with the current OpenTRV system at cost is appealing.</div>
<div><br></div><div>What happens next? Email <a href="mailto:opentrv@opentrv.org.uk">opentrv@opentrv.org.uk</a> by the end of Wednesday 12th Feb with your commitment to purchase a number of fully populated controllers and we'll be back in touch with payment details and the final price. The order will be put in probably by the end of that week (Friday 14th February) and there is a two week lead time for the boards to be made by the contract manufacturers. Given that we'll need a few days to separate out your kit, stick it in a box, write address labels and visit the post office we should have them with you by around Friday 7th March - but please don't shoot us if we don't hit that date.</div>
</div><div><br></div><div>Regards, Mark</div><div><br></div><div>PS Quick calculations:</div><div><br></div><div>Whole house system, e.g. 5 radiators meaning 5 valve actuators + 5 controllers, one doing double duty as a boiler controller, USB power supplies/battery packs + batteries, relay board, supply your own boxes totals around GBP420. We supply the controllers and details about where to get the rest of the kit.</div>
<div><br></div><div>Tinkering kit, meaning just 2 controllers, no need for boxes, plus a little for postage, totals GBP100.</div></div>