Hi, I found out that the alcohol sensor does not work on Arduino Uno R3, as when it’s attached to the board, Arduino IDE 1.8.13 returns error messages and the serial monitor won’t show anything (I did reset and restart IDE, but the error keeps coming on if the sensor is attached and no error when sensor is disconnected). But it works on Lotus 1.1, and will try on seeduino v4.2.
Also I found that the RS_air value stabilizes at 14.xx on some days, but 10.xx on other days, so not sure which to use. I waited 48 hours for it to stabilize. Is this the value that we should replace in the second sample code in the seeed instruction page for the sensor?
Thanks.