Companion hardware to an HA OS install that supports GPIO sensors and Celluar backup

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I moved the routing over to low cost, low power OpenWrt box. At this point my average power consumption is about 5 watts. So GPIO and OpenWrt average power consumption is about 2 Watts. If anyone is aware of a an alternative OpenWrt device that operates on average under 1.5 Watts, please let me know.

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