ESP32-CAM: QR code scanning for access control
Turn the ESP32-CAM into a QR code scanner: on-board decode with the quirc library, valid-code list, relay output for the door strike.
Tag
#security
8 tutorials
Arduino: motion-activated night security light
A real outdoor-style light: PIR triggers, an LDR confirms it is dark, a relay drives a 12V lamp. The AND logic that stops false triggers.
ESP32: add login auth to your web server (session cookies, the right way)
Add username and password login to an ESP32 web server with session cookies, random tokens, and logout. Self-hosted, no third-party identity provider, honest limits stated.
ESP32: sign OTA firmware updates so attackers cannot push their own
The MITM attack on unsigned OTA, why HTTPS alone does not save you, and the signed-update pattern that closes the loop. With anti-rollback and key rotation.
ESP32: secure boot and flash encryption, the real product build
Burn efuses, sign firmware, and lock the flash so a stolen ESP32 cannot be cloned. The right way to ship an ESP32 product instead of a hobby board.
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.
Pico 2: TrustZone on the RP2350, when the secure world matters
Use TrustZone on the Raspberry Pi Pico 2 RP2350 to isolate secure boot, sign firmware, and lock down GPIO. C SDK only; MicroPython does not expose TrustZone.
ESP32: detect motion with a PIR motion sensor
Wire a PIR motion sensor (HC-SR501) to an ESP32 and detect people moving in a room. The foundation for security, automation, and wake-on-motion projects.