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Features:
Power supply voltage: 5V USB cable connected to a mobile power source or connected to the USB port.
Display Value:
1. Display value 0-50 excellent
2. Display value 50-100 good
3. Display value 100-130 light pollution
4. Display value 130-170 moderate pollution
5. Display value 180-250 heavy pollution
6. Display value greater than 250 serious pollution
Onboard hardware resources:
1. Digital tube display [4 digits red]
2. 4 independent buttons
3. One temperature probe J1 port
4. A PM2.5 sensor interface
5. A serial port 2.54 pinhole [J2] - spare
6. A download program port - on the back, convenient for users to program themselves.
7. Two indicators can be used for PM2.5 and temperature setting indications, and can also be used for other purposes.
8. IO port output 2 - USB side - can be used for PM2.5 or temperature detection to output signals to the IO port.
9. Single-chip model: STM8S103F3P6
10. 2 LED indicators for indication
Note:
There is already a PM2.5 test program and temperature display inside the board when shipping