Secure OTA firmware updates for ESP32 over MQTT v5.0 with SHA-256, HMAC, and chunked transfer.
MQTTOTAv5 is a production-ready OTA library that uses ESP32_MQTTv5 as its transport layer. Features: MQTT 5.0 User Properties for metadata, SHA-256 firmware verification (mbedtls — no extra deps), HMAC-SHA256 signature (obligatory in production), incremental hash per chunk, Message Expiry Interval, Correlation Data, Response Topic, Subscription Identifier, Enhanced AUTH flow, Will Message with delay, non-blocking restart timer, and automatic rollback protection via ESP-IDF.
| Filename | Release Date | File Size |
|---|---|---|
| MQTTOTAv5-1.0.0.zip | 2026-04-14 | 23.22 KiB |