SERVICE / FIRMWARE DEVELOPMENT

Firmware Built for Real Devices

Firmware development is the process of writing low-level software that runs directly on hardware, managing device constraints, connectivity, and power states.

SOLVEO engineers production-grade firmware for custom hardware and microcontrollers (ESP32, STM32). We focus heavily on fault recovery, secure Over-The-Air (OTA) updates, and optimized memory management.

What SOLVEO provides

Demo firmware works on a desk. Production firmware survives in the wild. We build firmware that handles edge cases gracefully without requiring a hard reset.

ESP32 Development: Deep expertise in ESP-IDF (Espressif IoT Development Framework) for native C/C++ programming on ESP32 chips.
Secure OTA Updates: Implementing rollback-protected, encrypted Over-The-Air update mechanisms.
Power Management: Deep-sleep cycling and ULP (Ultra Low Power) coprocessor programming for battery-operated devices.
Hardware Integration: Custom drivers for I2C, SPI, and UART sensors where standard libraries fall short.

Device Lifecycle & Recovery

Real devices lose power, drop Wi-Fi connections, and face electrical noise. Our firmware architecture explicitly addresses the full lifecycle.

[Power On] → [Bootloader (Verify Image Signature)] ↓ [Initialize Hardware Watchdog] ↓ [Check NVS (Non-Volatile Storage) for Credentials] ├─ If Missing: [Enter BLE Provisioning Mode] └─ If Found: [Attempt Wi-Fi Connection] ├─ Success: [Connect to MQTT] └─ Failure: [Store telemetry locally, Retry exponentially]

Common Failure Points & Limitations

Heap Fragmentation: Over time, string manipulation and dynamic allocation can fragment memory, causing allocation failures. We use static allocation for critical tasks and ring buffers for telemetry to guarantee memory stability.

Bricked Devices: A failed firmware update can brick a device in the field. We implement dual-partition OTA mechanisms. If an update fails to boot, the device automatically rolls back to the previous known-good firmware partition.

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