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int sensorValue = analogRead(A0);
float voltage = sensorValue * (5.0 / 1023.0);
Serial.print("MQ135 Voltage: ");
Serial.println(voltage);
If you cannot find a working MQ135 model, use an analog sensor substitute: mq135 gas sensor library for proteus download upd work
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Let’s address the core action of the keyword – “download upd work”. Follow these steps precisely. If you cannot find a working MQ135 model,
Typically:
C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\LIBRARY
or
C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\LIBRARY