On 28/12/2020 16:53, Theo wrote:
> Chris Green  wrote:
>> OP here - I'm in the UK but the system this is for will be in France.
>> So digging out specialist providers and such is one level more
>> difficult than doing it 'at home'.
>
> Just a thought, but have you considered using SMS to ask the remote end to
> initiate the connection?
>
How does a Pi receive SMS?

How does a phone receive SMS if it isn't 'always on'

>  I don't know the best framework for handling the SMS side, but
> at the least something polling it with AT commands would do.
>
because its always on?



--
“when things get difficult you just have to lie”

― Jean Claud Jüncker

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