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I need to flash official, recent openwrt to RUT955. Unfortunately, there are (at least) 2 slightly different versions of the RUT955 available:

Having either 2xHC955 _OR_ PCA9539 to drive the LEDs or outputs. Which means, 2 different firmware images available, from official openwrt.

Are there any means, to identify from the outside (Serial No. etc.), which variant of the RUT955 the individual unit is, or, even better, to order in advance a specific variant ?

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by anonymous

Hello,

PCA9539 is used in our old revisions of the device until batch 15. All new devices are produced with HC955 module right now. It started from batch 17. You can view batch number on the device.

Regards.