You can check out the Monoprice and ZooZ 4 in 1 sensors. They have lux and motion sensors too, but you can reduce their sensitivity so they have minimal impact on battery life if you don’t need them. It also depends on the accuracy of the temp/humidity that you need. These devices can report up to a 0.1F change in temperature and 1% change in humidity at maximum sensitivity (which consumes more battery)
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