A VFO driven from an old phone.

VK3ZYZ

VK3ZYZ

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Staff member
This sound very interesting!
www.hackster.io

The Ultimate Smartphone VFO ESP32 & Si5351 Wireless Control

A professional-looking VFO for your radio projects without spending a fortune on touchscreen, rotary encoder or complex hardware. By Mirko Pavleski.
www.hackster.io www.hackster.io
This is on my old Galaxy Note phone.
Photo on 10-5-2026 at 7.52 PM.jpg

The browser I am using is Firefox.
Earlier I tried it on my dear lady's old phone that just has the native "Internet" app but it did one render correctly.
Here is his code as I have used, just added the web address.
It is running on an ESP32WROM-32 dev board.
This could be a very good use for an old phone!


login to the wifi network Si5351_VFO_Final_Complete
password vfo12345678
Webpage address 192.168.4.1
 

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VK3ZYZ

VK3ZYZ

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Photo on 10-5-2026 at 8.23 PM.jpg

This is on an Aspire One laptop.
The tuning works with holding the left click button down and swiping around the touch pad.
All that is needed now is to rotate the display to fit it in.
I think I'll try the old ipad....
Oh, I tried control - to shrink the display and it works :)
Photo on 10-5-2026 at 8.27 PM.jpg

If I could figure out how to shrink the display on my phone, it would all be there too.


I was going to leave a Youtube comment but cannot remember my Youtube log-in.
Later maybe!
 
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VK3ZYZ

VK3ZYZ

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Staff member
Here is my start to modify the code to default to 3.630Mhz on CLK1 and 1.647Mhz on CLK0 for use on one of the Codan sets.
The code does not include frequency limits as yet, or sensing/driving band selection on the radio.......
Quite a lot of the options do not apply to the Codans so they will be edited to suit, if I can figure out how it all works.

This is really impressive I think, in quite a short program.
Well done Mirko Pavleski
 

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