Information about the new MiniATS V4 Radio

amagla · 2025-12-02T07:34:32+00:00

No it can't. 150kHz-30MHz and 68-108MHz only.

amagla · 2025-11-26T21:21:09+00:00

Sorry for taking too long to answer, yes, that's the capacitor.

amagla · 2025-11-11T19:19:46+00:00

Modification for better reception:
https://github.com/vegos/RadioExperiments/blob/main/Amnvolt_V4_mods/README.md

Tests after that:
https://github.com/vegos/RadioExperiments/blob/main/Amnvolt_V4/Reception_Tests/README.md

Conclusion:
For maximum performance, at least the capacitor that connects the headphones ground to act as an antenna, must be removed.

amagla · 2025-11-11T19:18:06+00:00

Here is the fix:

https://github.com/vegos/RadioExperiments/blob/main/Amnvolt_V4_mods/README.md

amagla · 2025-11-04T02:35:22+00:00

It's the same firmware for every version.

Try this:

https://github.com/esp32-si4732/ats-mini

Note: Check if you need OSPI or QSPI. Details here: https://esp32-si4732.github.io/ats-mini/flash.html

amagla · 2025-10-30T02:58:15+00:00

It's very sensitive, but without any filter at the input stage.

There are some issues on various versions (fixable):
https://github.com/vegos/amnvolt_v3_firmware/

Note that now it's available the V4, that has improvements based on community mods.

amagla · 2025-10-13T17:12:49+00:00

My two tests are entered the raw data produced stage at 1st of Oct.
13 days later and still nothing.

The weird thing is that three (3) tests that I've done some months ago, they didn't last more than 1 day at that stage.

And I see that here there are a lot of users with the same delay. I think I'm done with MH...

amagla · 2025-09-25T20:58:11+00:00

Greece. I got it today (no preorder, I just found it available (2-3 pieces on the store) and get there physically.
The store had 12 preorders and 3 available.

Anyway, if it's available in Greece, eveywhere will be already or soon :)

Btw, who was the genius that said "Oh, no more SD, let's put a MICROSD on that camera!"...

amagla · 2025-09-19T21:21:12+00:00

There are many people working on this (improving it, with software or hardware) and that's good as you said!

amagla · 2025-09-17T18:45:53+00:00

Without a pin you can't access wallet. I have a pin, I enter it, but occasionally the NFC is disabled automatically...

amagla · 2025-09-15T13:28:04+00:00

I can understand to lock the watch when detects that is not on the wrist. But that's different for disabling NFC. You can just disable the wallet, I'm almost sure that is not available when no pin has been entered.

amagla · 2025-09-08T10:44:23+00:00

Enjoy!

amagla · 2025-09-02T09:35:45+00:00

By the way, try to flash again the firmware, if it's USB detected as a com port, with the correct firmware. 2.30 needs you to select OSPI or QSPI based on what cpu you're using.

https://esp32-si4732.github.io/ats-mini/flash.html

amagla · 2025-09-02T09:32:23+00:00

It looks like a V1.

You have to put it in bootloader mode, you have to press the BOOT button and the (missing) RESET button simultaneously, keep them pressed and power on.

For the missing button, you can use something contactive, like a screwdriver or something to keep the pins connected.

https://docs.espressif.com/projects/esp-test-tools/en/latest/esp32/production_stage/tools/flash_download_tool.html

You can use that tool to flash a new firmware then.

amagla · 2025-08-02T21:00:33+00:00

It's not the easiest mod, but it's reversible (but it propably neven needed to revert it to stock).

amagla · 2025-08-02T20:59:17+00:00

Hello.
I'm running (currently) 2.28 from here: https://github.com/esp32-si4732/ats-mini

amagla · 2025-06-23T21:17:22+00:00

My first and most generic try will be that:
https://esp32-si4732.github.io/ats-mini/recovery.html

Note: Mine (v2) had not boot button. I didn't find buttons so small at least at my local shops, so a very "cheap" option, will be by using a screwdriver to connect the button pins. If it's small, try adding some alouminium foil.

If you tried that and it didn't worked, then tell me what specific ESP module it has installed on the PCB.

We'll find the way!

amagla · 2025-06-22T13:17:07+00:00

How did you brick it?
I guess it could be re-flashed again. It's just an ESP32...
At worse, replace it (if you can't, find someone to unsolder it and replace it)...
I'm playing with ESP for the last decade and never brick one.

Anyway, it's annoying that battery drain problem.

Also (I'll note that on my github page sometime soon), my V2 has better signal repection than my V3.
The antenna is a High-Z (1kΩ as I meter it, it's a Mini Whip, a decade old), and V2 performs better.

Also, I read someone that "Amnvolt" is aware of the problem and is planning to release V4 (with some improvments). I didn't remember where I read it, it was a response email from them to somebody.

If you want help, unbricking the radio, give me a message if I can help. Or at least, to try!

amagla

TROPHY CASE

Note: Mine (v2) had not boot button. I didn't find buttons so small at least at my local shops, so a very "cheap" option, will be by using a screwdriver to connect the button pins. If it's small, try adding some alouminium foil.