Battery-Powered on Jari Hiltunenhttps://hiltsu.codeberg.page/en/tags/battery-powered/Recent content in Battery-Powered on Jari HiltunenHugo -- gohugo.ioenFri, 15 May 2026 00:00:00 +0000LoRaWAN Mailbox Alert: ESP32-C3 + RFM95W Battery Poweredhttps://hiltsu.codeberg.page/en/posts/postilaatikkohaly/Fri, 15 May 2026 00:00:00 +0000https://hiltsu.codeberg.page/en/posts/postilaatikkohaly/Build a battery-powered mailbox alert system using an ESP32-C3 SuperMini and an RFM95W LoRaWAN module. The system sends alerts through ChirpStack to InfluxDB and emails notifications when mail arrives. Powered by a 16340 Li-Ion battery and TP4056 charging module.