# Energy-Aware Duty Cycle Management for Solar-Powered IoT Devices

## TL;DR

This paper introduces a method to adjust the operation of solar-powered IoT devices based on predicted solar energy to ensure continuous performance.

## Contribution

A novel energy-aware duty cycle management system integrated with the Serverless IoT Framework for solar-powered IoT devices.

## Key findings

- The system adapts sleep times based on predicted solar energy to avoid downtime.
- A low-cost solar control board was successfully integrated with the Serverless IoT Framework.
- The approach was validated through a case study simulating cloudy weather conditions.

## Abstract

IoT devices with sensors and actuators are frequently deployed in environments without access to the power grid. These devices are battery powered and might make use of energy harvesting if battery lifetime is too limited. This article focuses on automatically adapting the duty cycle frequency to the predicted available solar energy so that a continuous operation of IoT applications is guaranteed. The implementation is based on a low-cost solar control board that is integrated with the Serverless IoT Framework (SIF), which provides an event-based programming paradigm for microcontroller-based IoT devices. The paper presents a case study where the IoT device sleep time is pro-actively adapted to a predicted sequence of cloudy days to guarantee continuous operation.