Need a Zigbee repeater.

I just got my smart home stuff going with an Aeotec hub and 4 Sonoff ZBMINIL2 modules. Three of them connected but I guess one was out of range. Those modules are just end devices so I figure I need a Zigbee repeater .

Instead if just getting a plugin repeater like the Aeotec Range Extender Zi I was wondering if there was a plug in Zigbee light sensor that also extended the network. Does anyone know of one?

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