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On 2025-12-12 11:26, The Natural Philosopher wrote:
> On 11/12/2025 21:06, Carlos E.R. wrote:
>> On 2025-12-10 11:24, The Natural Philosopher wrote:
>>> On 10/12/2025 10:02, c186282 wrote:
>>>> On 12/10/25 04:14, Andy Burns wrote:
>>>>> c186282 wrote:
>>> Now off to write the software that will look at it for me and warn me
>>> of things by email.
>>> So I can get on with the next project.
>>
>> You mentioned thieves stealing fuel. You can also monitor for that.
>> You would need a fuel flow meter on the fuel line, or a sensor telling
>> when the furnace is working. Compare with the tank level decreasing
>> rapidly.
>>
>
> The problem is that the sensor I built on the tank has no power except
> batteries: So it only wakes up occasionally and draws nanoamps in between.
> I have completed the warning software that looks for low oil levels,
> loss of communication, a failing battery and unexpected changes in oil
> level, BUT it cannot do that in real time as the unit is only powered up
> for a minute or so every couple of hours.
>
> Depending on how long the batteries last I may increase the frequency of
> operation. But it can never be `real time`
Ah.
What about a small solar panel and rechargeable batteries?
--
Cheers, Carlos.
ES??, EU??;
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