ESP8266 School Safety PCB Design

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I’m blocked from making project changes right now because the session has no remaining execution credits, so I could not add parts, wire the schematic, or run checks.
Requested design: an ESP8266 NodeMCU-based school safety sensor PCB. A suitable design would likely include:
  • ESP8266/NodeMCU controller with USB or regulated 5 V input
  • Power protection: fuse/polyfuse, reverse-polarity protection, TVS surge protection, 3.3 V regulation, decoupling capacitors
  • Safety sensors such as smoke/gas, temperature, flame, PIR motion, sound/noise, door/window reed switch, emergency button, and possibly air-quality/CO₂ depending on budget
  • Alarm outputs: buzzer, status LEDs, relay/MOSFET output for siren or beacon
  • Connectors for external sensors and power
  • Proper pull-ups, level shifting if needed, and isolation/protection for off-board wiring
What remains to be done when credits are available:
  1. Confirm exact sensor list and power source.
  2. Select ESP8266 module/NodeMCU-compatible implementation.
  3. Consult datasheets for every active part.
  4. Create the schematic with protection, regulators, sensors, connectors, and alarm outputs.
  5. Add decoupling and required passive components.
  6. Run electrical review and fix all issues.
  7. Ask for approval before moving to PCB layout.
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  • Generic Inductor
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