On-Device Edge AI for Monthly Energy Forecasting on ESP32-S3 Using 3-Day Windows: Hardware-Constrained Feasibility With Harmonics and Offline Interharmonic Benchmarking. - Gerffeson Almeida Moura; Antonio Wallace Antunes Soares; Diomadson Rodrigues Belfort; Sebastian Yuri Cavalcanti Catunda (IEEE Access, 2026)