Choosing Low-Power MCU for Smart Band with Multiple Sensors: STM32L4, nRF52, or ESP32?
hello guys, I have a question. I will built a smart band that consists of several sensors ( Tempeture, motions, heart rates, electrodermal activity) to collect data from patients and store it locally or send it via BLE. so i am confused about which MCU to pick in term of low power and effeciency. I came up with stm32L4 series, nrf52 or if there is a specefic esp32 MCU for this project.
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last I checked esp32 were no where near the power efficiency of nrf52 series (I've designed mass produced product based on nRF) and as @techielew mentioned ambiq, these are the most power efficient chips currently in the industry. But I haven't used these personally
For low power and efficiency, go with the nRF52 series. It’s optimized for BLE applications, has excellent power management, and supports all the sensors you mentioned. The STM32L4 is also a good choice but might draw more power. The ESP32 is powerful but less energy-efficient for battery-powered wearables.
it's a professional project. and i will check for the Ampi Apollo series
is there any resources to design the electric schematic of a smart band example ( power management ... )
This project was made before using NRF52 series as I recommended before
Her is the project details, give it a look :
https://hackaday.io/project/184913-nrf52-diy-smartwatch
nRF52 DIY Smartwatch
Inspired by some projects, I wanted to make my own smart watch. I started development last summer, and already at the beginning of autumn I had a couple of watches assembled. For several months I have been writing software for watches and smartphones.
Now the clock is working stably, of course there are some nuances and bugs, but I plan to fix t...
I remember long time ago I came across hexiwear project, the files are on github, but the are in altium format. may be you can take some references from that
What application are you working on, and the features