[Lab] [Bulk] Re: ESP8266 Issues

Ken McKinnon klmckinnon at rogers.com
Tue Nov 25 17:20:57 EST 2014

I had thought about doing this a few years ago for ground water height 
(but long before really low power stuff and decent solar cells) - and 
power was the problem that shelved it.  Your idea is very close to what 
I was going to do.  I never got as far as testing, but am curious as to 
what the sonar bouncing off the walls of the pipe would do.  The other 
difference is I was going to use a ping pong ball to make sure it would 
be oriented right without sticking to anything.
I would be interested on how it works out for you.


On 2014-11-25 2:49 PM, Adrian Jones wrote:
> Hello all,
> Thanks for your suggestions.
> Turns out that the baud-rate is 9600 for newer units and at this rate, and
> with a stable 3.3v power supply (this little puppy sucks power!), was able
> to connect it to my WiFi.
> I am toying with the idea of making a data logger to measure the
> fluctuations of the water level of our lake. As a dammed river, the water
> level fluctuates depending on the amount of water in the Rivière Blanche
> watershed.  I'm thinking that the design will have an ultrasonic transducer
> at the top of a length of ABS pipe that is partially submerged in the water.
> A disc of plastic inside the pipe floats on the surface of the water and
> provides a large surface area to rebound the transducer's ping. As the water
> level rises, so too does the float and the ping echo is made shorter. I plan
> to add a small solar cell and set of rechargeable batteries and an RTC to
> wake the software up every few minutes. The software will take a number of
> readings which, when averaged, will be sent over the WiFi connection to an
> online data logger. Interesting?
> Regards,
> ... Adrian
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