ESP32: send email alerts over SMTP, no cloud service
Send email straight from an ESP32 over SMTP with STARTTLS. Works with your own mail server or any provider, no third-party IoT API.
Tag
#tls
3 tutorials
ESP32: TLS in depth, root CAs, and validating real certificates
Move past setInsecure() and the WiFiClientSecure default that ships in every HTTPS example. Bundle root CAs, validate chains, and pin fingerprints on the ESP32.
ESP32: send HTTPS requests with root CA validation
Make the ESP32 talk to real APIs over HTTPS, with proper TLS validation. The right way to send sensor data to a cloud service.