How to develop ultra-low-power and battery less demo with STM32U0 MCUs

Revision as of 11:59, 13 May 2024 by Registered User (Introduction sentence and purpose of the demo part)
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This article is about STM32U0 battery less demo. It provides explanations on how the demo works, and describes step-by-step how to reproduce it.

1. Purpose of the demo

The goal of this demo is to illustrate the STM32U0 best-in class ultra-low power capabilities. It is running without battery thanks to Dracula technologies inkjet Printed Organic Photovoltaic module, which harvests energy for the STM32U0 MCU. This is a luxmeter and thermometer demo with data being displayed on an LCD segment display, and the possibility to send data thanks to a radiofrequency module. The demo can also work standalone without RF module. So, the demo exists in 2 versions without, referred as standalone version, and with the RF module, referred as RF version in this document.

2. How the demo works

2.1. Schematics

2.2. Demo principle

2.3. Light measurement

3. How to reproduce

3.1. Bill of material

3.2. Reproduction of data logger

3.3. Reproduction of display

3.4. Software