ESP32 Smart Parking Project Plagued by Power Issues Caused by Servo Motors

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A developer building an IoT smart parking system on an ESP32 encountered persistent hardware instability, including random display shutdowns and unreliable servo motor behavior. The root cause was traced not to faulty code but to inrush current spikes drawn by multiple servo motors sharing the same power supply as the ESP32. These current spikes caused voltage drops, triggering brownout resets that made the entire system behave erratically. The fix involved isolating the servo motors onto a separate power supply, which immediately resolved all symptoms. The experience highlighted a key embedded systems lesson: software and hardware failures can appear identical, and physically disconnecting components one at a time remains the most effective diagnostic method.

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