Smart laboratory management system-host

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The design of the upper and lower computers of the smart laboratory management system requires supporting the lower computers, which is in another open source project.
## Highlights:
1. Support NFC card swiping to identify authorized personnel, control door locks through relays, record attendance data, and remotely power off the corresponding workstations.
2. Built-in combustible gas sensor and temperature sensor.
3. Support esp chip data upload and download, remote control, and read records.
4. Use PLC module to transmit data through power lines without wiring, which is convenient and fast.
5. AC220V power supply, one-line connection, neat and beautiful wiring.
6. Optional OLED display to display card information and current status.
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Module used:
standard relay, f103 small system board will not be introduced.
RC522 rfid card reader! [image.png] 220v to 12v module! [image.png] plc module Neusoft ES1642! [image.png] MQ-2 combustible gas sensor! [image.png] ***
Source: 20 years of technology project establishment by myself, shared after graduation