Celium BV had the vision, the hardware, and the team. What they didn't have was a working board. DBtronics diagnosed each fault from first principles and rebuilt the system piece by piece until every component worked.
MILESTONES DELIVERED
CRITICAL PCB FLAW RESOLVED
FIGMA DESIGNS ON DEVICE
NOT MONTHS — TURNAROUND
Celium BV
Netherlands
AgriTech — Mushroom Growth Systems
March 2024
ESP32-S3 · Custom PCB
Complete — All Deliverables Met
Celium BV is a Netherlands-based food technology startup building automated systems for mushroom cultivation. Their product combines custom hardware, embedded software and a user interface to monitor and control the growth environment — temperature, humidity, imaging and more. By early 2024 they had a custom ESP32-S3 board in hand and a clear product vision in Figma. The problem: almost none of it worked.
The board had been designed and fabricated, but across every major subsystem something was broken. The previous developer had dropped off without resolution.
Blank output regardless of configuration — no image ever reached the microcontroller.
Storage integration was never built, so nothing could be captured or retained.
The display had been dark for weeks and the touchscreen was completely unresponsive.
A finished UI vision existed on screen, but nothing had been implemented on hardware.
Before writing a single line of code, the custom PCB was loaded into Altium Designer and analysed pin-by-pin. The analysis revealed that all camera signal pins had been assigned in reverse order relative to the manufacturer's specification — a fundamental hardware design error no firmware change could have fixed. That pattern — trace the problem to its actual source before attempting a fix — defined all four milestones.
Pin alignment corrected against the manufacturer specification, and capture validated on both standard and custom boards — high-resolution imaging achieved without external PSRAM.
SPI validated against the custom pinouts, with captures written to the card on a button trigger.
The correct ILI9340 driver identified by reading the display's internal registers directly from hardware.
The touchscreen driver recovered from the previous developer's git history, and the complete Figma UI running on device with animated transitions.
Before DBtronics: blank camera output, no SD integration, a dark LCD, an unresponsive touchscreen and a UI stuck in Figma. After: every subsystem working, on hardware.
MILESTONES DELIVERED IN FULL
LONG-STANDING ISSUES LEFT
FIGMA DESIGNS TRANSFERRED
ALL DELIVERABLES MET
"Dian went beyond what we expected and helped with figuring out long-lasting issues we had. I appreciate working with him and look forward to future projects.
We diagnose hardware and firmware faults at the source, then deliver the working system.
