eve degree weather sensor
Elgato's basic weather sensor compatible with Apple HomeKit platform. Elegant design: aluminum frame, acrylic front, negative LCD display (though regular one would be probably more readable) but hefty price (~$80).
While instruction claims 1 year cell (CR2450) life, I was able to get less than two months from it. That's very disappointing and unusable in my opinion. I've tried also powering it with 2 AA cells, but work time was still not satisfying and cells were depleted down to 800 mV / cell and started leaking.
I'm not sure if there is not something wrong with my unit, but looking into amazon reviews it looks like complaints regarding poor battery life are quite common.
Disassembly: front panel is glued with double-sided tape.
Manufacturing/service header.
Dexatek SA-7176 V2.0.
Silabs CP2403: LCD controler, I2C, up to 64 LCD segments.
Main SoC: Dialog DA14681. Cortex-M0 with dynamically scaled clock (PLL, on the fly), BLE 4.2 MAC and transceiver and
many peripherals that would be unused here.
External QSPI FLASH.
Bottom side of the PCB: two sensors and reset/display pushbutton.
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