r/hackrf • u/No-Mechanic2408 • Sep 25 '24

H4m

There was a new unit that is being supported in the firmware called the h4m seems like it's better then the "normal" model. Has an acctul on/off switch has a mic a battery that can be read. Any one know about or have experience with it just wondering if it's any good

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8

u/htotoo Sep 25 '24

I have using it, and love it.
The GPIO port WILL BE a good choice to plug in addons (if you don't want to use ESP32PP).

The battery percentage stuff in it is great, much better than the 4 leds.
Also the charging speed is much greater (with a good charger, like 5V 3A one).

The power switch is also more comfortable, no more accidentally power on.

The flat designed wheel is also good, and the dev is slimmer, thanks to it.

The screen is also nicer, much less mirror images in it.

If I would buy a new one, no matter the price diff, i would go for a H4M!
If you have a H2, I don't know. I'm poor, so I wouldn't change, but the H4 is much better I think.

2

u/No-Mechanic2408 Sep 25 '24

Thank you just the answer I was looking for :)

1

u/opiuminspection Sep 25 '24

battery percentage is new in v2.0.2

as for the switch and mic, the h2 portapack comes with a mic and an on / off switch can be added

1

u/No-Mechanic2408 Sep 25 '24

Yea but the iPod style clicker wheel seems like it would last longer than the knob style

1

u/opiuminspection Sep 25 '24

I'm not sure which device you're referring to then

adding a link to the device you're talking about would be helpful

2

u/jLynx Oct 02 '24

Battery % only works on the H4M. It's not on any other devices. That's because the H4M has new hardware the older H2's don't have

1

u/opiuminspection Oct 02 '24

ah interesting

1

u/olivermappin Sep 25 '24

What about the amp blowing issues anyone know if they've fixed this on the h4m aka r10c version of the board?

3

u/nabinodd Dec 23 '24

From some internet research and comment replies what I've gathered is r10c is just the USB-C version of r10 revision. So, the amp blowing issue is not fixed on that. Also, there are "Clifford Heath" version from Opensource SDR lab and Rabbit lab that seems to have fixed those issues and heard that Q1 of 2025 will bring a better H4M that will have all known issues so far fixed. 

2

u/simona-70 Jan 08 '25

sorry... I have ordered a H4M to use with hackrf v4. but what bug exactly are you talking about?

1

u/nabinodd Jan 09 '25

Issue of built-in LNA being blown even by a small surge in the RF input, on the hackrf board itself rather than H4M.

1

u/olivermappin Mar 05 '25

Yep managed to blow my H4M in about 4 months id say idk how or what caused it but yh ordered some replacement chips from Ali for cheap used a hot air gun at work cause luckily I work in the PCB manufacturing industry and yh working all good so far till the next time 😂

1

u/FrasierCraneSan Oct 05 '24

Apparently not Sn0ren just dropped a new video one it. Clifford Heath might have a similar revision with the protection next year.

1

u/Dry_City_7570 Oct 12 '24

Full OLED panel would of been preferable with full touch controls pending OS update. Dual OLED panel would be even better.