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Legs
Newbie

Joined: 13/09/2017
Location: Australia
Posts: 1

Posted: 07:50am 19 Dec 2023

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I have built the Irrigation Controller designed by Geoff and it works a treat. Easy to access via the IP address whilst connected to my network but I wish to access via my phone remotely when not connected to the network and am unsure as to how to achieve this.
Any help will be appreciated

oh3gdo
Regular Member

Joined: 18/11/2021
Location: Finland
Posts: 47

Posted: 09:03am 19 Dec 2023

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Legs
I have done phone used dryer controllers about 20 years.
They have a small relay.

Here is the basic diagram of the device.
It needs a gsm module or a GSM modem.
The modem is easier to do.

Then you need a small processor.
I use always Microchip PIC cpus, but you can use any processor.

If you use a modem, you need a serial connection to the gsm modem.
If you use a gsm module, you use a uart connection

Then you need a program, which reads input from gsm.
It has a lot of work, but I think it is not a problem.

Please ask more
Pekka Ritamaki Finland,
oh3gd@gmail.com

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 9118

Posted: 09:20am 19 Dec 2023

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You just need to port forward port 80 through your router then the controller will be accessible from the internet and you can use a browser on your phone. If, as is likely, your IP address varies you will need to set up dynamic DNS on your router to get a fixed IP name - e.g. noip.com

Volhout
Guru

Joined: 05/03/2018
Location: Netherlands
Posts: 4238

Posted: 09:42am 19 Dec 2023

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oh3gdo said Legs
I have done phone used dryer controllers about 20 years.

Then you need a program, which reads input from gsm.
It has a lot of work, but I think it is not a problem.

Please ask more
Pekka Ritamaki Finland,
oh3gd@gmail.com

GSM/GPRS is phased out in many countries already. You could look at SIM7000 series.

Volhout
Edited 2023-12-19 19:51 by Volhout

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TassyJim

Guru

Joined: 07/08/2011
Location: Australia
Posts: 6098

Posted: 08:07pm 19 Dec 2023

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matherp said You just need to port forward port 80 through your router then the controller will be accessible from the internet and you can use a browser on your phone. If, as is likely, your IP address varies you will need to set up dynamic DNS on your router to get a fixed IP name - e.g. noip.com

To ad to Peters comments.
A lot of ISPs are now using CGNAT which means that you don't get a public IP address to connect to.
Some ISPs will allow you to switch to a true public IP for no charge, but other will require you to sacrifice your first born...
Some ISPs will make it difficult to get into their router if it is one supplied by them.

My ISP left me on a true IP when they introduced CGNAT so I have no problems with port forwarding. I don't use port 80 instead use a higher port and translate that to 80 internally to suit things like the irrigation controller.

It can be done but how easily depends on who you signed up with.

Jim

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