We had an x10fs for a serial cm11.
Might be even in sources.
On Fri, Jul 29, 2011 at 10:25 PM, Bakul Shah <ba...@bitblocks.com> wrote:
> On Fri, 29 Jul 2011 06:44:09 PDT David Leimbach <leim...@gmail.com> wrote:
>>
>> I was outside watering plants this morning that seem to be proof of my
>> "not-so-green thumb" I have for gardening and was thinking of an interesting
>> home-automation use for Plan 9.
>>
>> What I'd like to do is get the following:
>>
>> 1. Moisture sensor I can embed in some potted plant soil, and read from Plan
>> 9
>> 2. Tubing.
>> 3. Pump I can control from Plan 9 based on moisture feedback.
>> 4. Perhaps a rain bucket water source.
>>
>> Anyone else using Plan 9 for automated gardening? I was thinking this could
>> be the use for Plan 9 on my guruplug.
>>
>> Any ideas how best to achieve this? If some stuff isn't supported by Plan
>> 9, I'm willing to investigate the writing of drivers to make it work
>> properly.
>>
>> Just trying to find new ways to be lazy I suppose.
>
> I just used X-10 for years for watering (periodic, no moisture
> sensing -- plants are very forgiving). I still use that old
> CP-290 for lights, laser printer on/off etc. One of these day
> its ctl program needs to morph into a 9p server.
>
> You can build a very cheap moisture sensor with two electrodes
> and some plaster of paris [make it small so that it dries
> quickly]. Calibrate resistance as a function of moisture.
>
> May be an Arduino to measure the resistance and control a
> relay to power a solenoid valve? May be it can talk 9p.
>
> That said, I am very interested in an el-cheapo building block
> that talks 9p over USB and can connect to various sensor
> inputs, D2A and PWM outputs to control steppers etc. It should
> mostly sleep to conserve power. Even nicer if it can be
> wireless. el-cheapo == under $10 in small quantities!
>
>
