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I love the ESP32 and use it as the central gateway/hub in the IoT solutions I develop.

However the ESP32 power consumption is too high. TI has an ARM-based wireless sensor platform that can run for years while making measurements every five minutes.

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ESP has more than ESP32 microcontrollers. They also have lower power microcontrollers and even RISC-V based microcontrollers.

I've used a lot of them, I've used various boards in education. Few alternatives offer as mature and smooth experience that Arduino (AVR) boards do.

That's not to say there aren't some great ones out there, but any stumbling stones as a beginner might as well be cliffs.

can you name it please? I'm interested in a hobbyist project and although I haven't got up off my arse yet, I might one day...

Look at TI's CC1310 platform for wireless sensors. There may be newer models of it.

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