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The normal firmware update process that we can perform in TL-WR840N doesn't work to TL-WR840n.

The firmware download from TP-LINK to TL-WR840N works fine but can be applied to TL-WR840N.

I've heard something about TpUpgrade. I was able to download the software but I wasn't able to apply the firmware update thru TPUpgrade.

Can anyone give me a hint about it?

I'm trying to apply TL-WR840N(BR)_V4_170512 in my TL-WR840n with no success.

But I was able to apply the same firmware into TL-WR840n and have it updated.