Contact person: Custom STM32 Bootloader with ESP32 OTA & Secure Communication

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Location: Chennai, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Description:
I need a custom STM32 bootloader that receives firmware over-the-air from an ESP32 module. The two devices will communicate primarily over UART (SWD optional if feasible without extra hardware).

Core Bootloader Requirements:
Firmware verification: never boot corrupted images
Automatic rollback to last known-good image on failure
AES-encrypted firmware packages, end-to-end security
Clean reboot into new firmware after successful update

ESP32 Role:
Download firmware via HTTP
Store image and stream it to STM32 (UART baseline, SWD optional)
Manage transfer + status updates

Communication Goals (STM32 ↔ ESP32):
Regular data transfer
Command execution
Status monitoring
Extensible command set for future expansion

Deliverables:
Commented STM32 bootloader source (C/C++, HAL or bare-metal)
ESP32 firmware for OTA + UART/SWD transfer
PC-based flashing tool (Python script acceptable) for initial provisioning
Documentation: memory map, update sequence, encryption key handling, rollback procedure

Success Criteria:
Demo of a full update cycle
Forced failure scenario showing automatic rollback
Encrypted transport with successful verification

If you’re an embedded developer with STM32 + ESP32 + OTA experience, this is a challenging project that needs your expertise." (client-provided description)