No readable output from Sensor

[CAMR94]

Hello, I was trying to implement the Ozone Sensor in a project I'm working on. I imported the library and used the exact example code. Also I recreated the circuit with the bakelite low concentration version. So With all of that it should work...but it doesnt't. The Output is as follows:

Callibration in Progress... ?F?

and after that it just doesn't proceed with anything. I don't really know, what I am doing wrong. Any help would be greatly appreciated.

Greetings from Germany. Chris

[ostaquet]

Hi Chris, Seems strange... The line Calibration in progress... is in the main function and should be followed by the Calibration done! in the example. The calibrate() method doesn't output anything so I don't understand why you get the ?F?.

• Which Arduino board are you using?
• Did you check the sensor with a multimeter?
• Did you change something in the code?

KR, Olivier

[CAMR94]

Hi Oliver,

Thank you for the reply.

I did not change anything in the Code:

I'm using a Sainsmart Knockoff of the Arduino Uno.

By now I actually don't even get the Calibration in Progress message. Only the weird ?F?.

I checked the circuit. The Heater circuit is getting 6.5V and the Sensor circuit 3.5V

Greetings, Chris

[ostaquet]

Hi Cris, Did you configure correctly the baud rate of the serial debug interface? In the sketch embedded in the example, the serial is configured at 115200bps. KR, Olivier

[CAMR94]

Hello Oliver, You were right, the Baud rate was wrong. Thank you very much. I am now running it at 9600bps and I'm getting a reasonable output. But the Sensor shows a saturation of "inf ppm" etc. so every value is at infinity. But I had no time yet to let it burn in, so I guess I will do that next.

Again thank you very much. Greetings, Chris