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    That’s impressive, and gives me some power saving ideas for building a weather station in the pacific NW (where solar power for recharging is meh at best for most of the year).

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      If you don’t need Wi-Fi something like this will give you about the same battery life with a much smaller battery. I suspect it’s using something like a TI CC2650, which is available in the SensorTag if you want to take the DIY route.

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        The Govee thing seems to be a proprietary dumpster fire (can it be reprogrammed? it’s not clear. I could be wrong), and the TI thing (as in the SensorTag) looks interesting. My attraction to esp devices is that there are quite a few options for development environments, due to their popularity.

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          I haven’t looked into reprogramming the Govee (I have one). I was just suggesting it as a quick and easy way to get started. I bought it in December after not taking my plans to build a wireless temperature sensor out of a SensorTag further than building chip and board support crates for it and getting one of its LEDs to blink.

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      Very interesting. I wouldn’t have expected to be able to get a battery life so long without a lot more custom hardware / EE knowledge.

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        For people who just want environmental sensors without building them from scratch, I’ve found these things pretty cool and open source: https://ruuvi.com/

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          surprised dhcp takes so much time, that’s nuts.

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            That surprised me too, though I don’t suppose it really should have. I wonder if using ipv6 would make it faster without having to encode a staic global IP addres. Link-local addresses are fe80::something-made-of-mac-address, seems like that should be possible to set up without performing ny network traffic

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            I wonder how much the lifetime would be with ESP Now which is a broadcast like low level Wi-Fi https://www.espressif.com/en/products/software/esp-now/overview