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From: The Natural Philosopher <tnp@invalid.invalid>
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Need help with PI PICO...
Date: Tue, 26 Mar 2024 18:50:47 +0000
Organization: A little, after lunch
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On 26/03/2024 18:16, Ahem A Rivet's Shot wrote:
> On Tue, 26 Mar 2024 17:33:50 +0000
> Jim H <invalid@invalid.invalid> wrote:
> 
>> Assuming the "oil" you're talking about is kerosene/heating fuel, the
>> speed of sound is 1330 m/sec so 0.5cm takes 3.76 micro-sec.
> 
> 	I would have thought it's measuring the distance to the surface of
> the oil from above the oil so it would be the speed of sound in air that
> matters 300m/s.
> 
Correct, Mrs Shot.
Anyway it's died within 30 minutes of going back on 'short echo'...
So its definitely sensitive to that in some way.

I'll add more debug code tomorrow

-- 
When plunder becomes a way of life for a group of men in a society, over 
the course of time they create for themselves a legal system that 
authorizes it and a moral code that glorifies it.

  Frédéric Bastiat