Wireless Extender Repeater

Hi all
I would like to use an old device with OpenWRT 19 installed as a wireless extender/repeater.

I can Join to my router/modem wireless network in wireless tab but when I add the second wireless interface in order to link to my OpenWRT extender I have both the wireless interface as disabled.

Is it my hardware not compatible? I am using a modem router AGPW from Pirelli.

Can somebody help me to understad?

Thank you

Aside from this device being below minimum system requirements (16/32) and 19.07.x being EOL, this isn't exactly a great hardware for this purpose with single-band 802.11g and rather high power consumption (going into the unsupported ADSL modem and FXS features). That said, I'm not even sure if b43/ bcm4318 even supports multiple interfaces (iw list will tell you about the valid interface combinations).

Thank you for your answer.

From Iw list I get the following:

iw list
Wiphy phy0
max # scan SSIDs: 4
max scan IEs length: 2285 bytes
max # sched scan SSIDs: 0
max # match sets: 0
max # scan plans: 1
max scan plan interval: -1
max scan plan iterations: 0
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Available Antennas: TX 0x3 RX 0x3
Configured Antennas: TX 0x3 RX 0x3
Supported interface modes:
* managed
* AP
* monitor
* mesh point
Band 1:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm) (no IR)
* 2472 MHz [13] (20.0 dBm) (no IR)
* 2484 MHz [14] (20.0 dBm) (no IR)
interface combinations are not supported
HT Capability overrides:
* MCS: ff ff ff ff ff ff ff ff ff ff
* maximum A-MSDU length
* supported channel width
* short GI for 40 MHz
* max A-MPDU length exponent
* min MPDU start spacing

So I suspect no multiple interface combination support. Is it right?

Can I use it as mesh point?
Thank you

Right, it can't run AP and STA combined or any other combination. I haven't heard of running mesh on Broadcom chips but it looks like you could try. An encrypted mesh (SAE) is probably not possible.

Thanks Have you got Link in order to do mesh?

Should I have mesh enabled on my Internet connected Router (provided by my ISP) or I can just set up my OpenWRT device?

Thank you

You'll need two or more OpenWrt devices to form a mesh. Third-party meshing standards are all different and rarely interoperate.