If possible to run a cable you can always add an AP closeer to the Coop or if that's not possibel you can always look in for a WIFI extender. I am using this and works great.
netgear Extender EX7000
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If possible to run a cable you can always add an AP closeer to the Coop or if that's not possibel you can always look in for a WIFI extender. I am using this and works great.
netgear Extender EX7000
6’ Ethernet Patch cord
Have you tried turning up the gain on the antenna?