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| Feature | Datasheet Says | What You Actually Need To Know | |---------|----------------|--------------------------------| | Boot Mode | "GPIO0 low = flash mode" | Also need GPIO2 high, no external load on RST during power-on. | | Power Supply | "3.0V-3.6V" | Needs 500mA peak, low-ESR capacitor (≥10µF + 0.1µF) at VCC pin. | | Reset | Active low pulse >100µs | Also requires stable VCC before releasing reset. | | Antenna Keep-out | "Keep copper clear" | Also keep plastic enclosures >5mm away – detuning kills range. |
Developers began translating the ESP-01 Datasheet and discovered its secrets: esp01 datasheet