usb hub with 7 ports

[Adrian P]

Hello,

Any of you worked with specific usb hub 7 ports usb 2.0 on/off power switch per port with good results?

Did anyone used this type usb hub ?

I need a usb

https://www.aliexpress.com/item/32792381784.html?spm=a2g0o.cart.0.0.22ef3c00tmBFAM&mp=1

Thank you

Adrian

[Emiliano Vazquez]

Hi Adrian.

In my little experience i did not find any hub for this work. You can have 7 ports with 7 dongles and you can recognize them but when you put this seven dongles to work the power consumption will be more and then the fails come up.

This modems will work if you use them only to send and receive SMS but with calls it get more difficult.

The main problem is the poor components on this hubs. You need a lot of Watts to get it working all day.

Best regards.

Emiliano.

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[Pol Isidor]

Hello..

I'm using this hub with 3 modem with orange PI and it working nicely.

Only thing what I did is that I put my power source and keeping with DC2DC booster 5.2V on ports.

Power supplay is strong ~5A (shared with other devices)

[Pol Isidor]

Maybe the components are cheep and poor, but stabile. I;m using aporx 1 year this hub, but with my power supplay!

On Thursday, 23 January 2020 15:40:00 UTC+1, Emiliano Vazquez wrote:

Hi Adrian.

In my little experience i did not find any hub for this work. You can have 7 ports with 7 dongles and you can recognize them but when you put this seven dongles to work the power consumption will be more and then the fails come up.

This modems will work if you use them only to send and receive SMS but with calls it get more difficult.

The main problem is the poor components on this hubs. You need a lot of Watts to get it working all day.

Best regards.

Emiliano.

On Mon, Jan 20, 2020 at 3:47 PM Adrian P <praeto...@gmail.com> wrote:

Hello,

Any of you worked with specific usb hub 7 ports usb 2.0 on/off power switch per port with good results?

Did anyone used this type usb hub ?

I need a usb

https://www.aliexpress.com/item/32792381784.html?spm=a2g0o.cart.0.0.22ef3c00tmBFAM&mp=1

Thank you

Adrian

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[Adrian P]

Hi,

Of course I will use it with a power supply 5V 2,5-3,0A.

I will buy this usb hub from aliexpress and test it with 7 dongles with simultaneous gsm calls.

I will return with feedback.

Thanks

Adrian

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Adrian Padureanu

t: +40731.489.152

[Alejandro Donato]

Hi!

My 2 cents.

Modems in IDLE status, consume about 0.05 Amperes. In a SMS transaction, go up to ~0.10A. In a call, about 0.30A. So, to calculate the power needed to provide a stable operation its easy.

8 dongles in calll, uses about 2,4a. Power supplies not always acomplish with specs, so, double it. With a 5A power supply, and with no signal issues, all must work fine.

Thats why external power supply is needed (onboard usb ports only provide 0.5A max by spec)

So, get an external powered USB hub, or feed them in the 5v line with an external power supply (dont forget to common ground all to avoid damage)

Failling to do this, generates random inestability in the whole hub (modems hanged by underpower, etc)

Enjoy!

Alejandro

El 24/1/20 a las 08:07, Adrian P escribió:

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