EC Voltage is not stable

I've encountered several persistent challenges that have hindered the functionality of DFRobot Gravity: analog electrical conductivity sensor/meter(K=10), and despite exhaustive attempts to troubleshoot, I'm yet to find a resolution.

Here are the specific issues I've been facing:

Hi Mikael Bergvall,

1.

 It is recommended that you use an Arduino Uno. Please check if Uno outputs standard 5V. If powering the sensor with 3.3V, the example code needs to be modified. Upload the EEPROM sample code, and then calibrate.

The analog value read by esp32-E is not very stable. If you want to use an ec sensor, you need to add an ads module(https://www.dfrobot.com/product-1730.html)  and modify the value of digits and voltage of the ADC in the sample code (esp32-E 3.3V ADC12bit: 2^12=4096). For example: voltage = analogRead(EC_PIN)/4096*3300;

At the same time, we do not have test records of MKR 1010 Wifi.

2. 

When calibrating, the relevant parameters are stored in the specified position in EEPROM. If other data is previously saved in the same position in EEPROM, there may be a conflict, resulting in an inability to calibrate properly. Use the following code to erase the contents in the specified position in EEPROM. Run it once, then upload the sample code again to restart the calibration.

3.

The signal adapter boards of K=10 and K=1 are different, please do not mix them.

 If these cannot solve your problem, please get in touch with technical support email: [email protected] for the inconvenience.

Does the Gravity: Analog Electrical Conductivity Sensor PRO (K=1) mesure a value as a sample 1.413 without jumping up and down? Someone testet it? 

Also buy a new meter, a was thinking the old one was broken. 

I have calibrate it on 3 different bords with alot of different values for voltage, tested 3,3 and 5 v. Same all the time, soon give up on this. 

Ensure that your sensor is properly calibrated. Follow the calibration procedure provided by the manufacturer or supplier of the sensor. Calibration helps to establish a baseline for accurate readings.

Also make sure that the sensor is placed correctly in the liquid being measured. The electrodes of the sensor should be fully immersed and not touching the container walls or other objects. Ensure that the liquid is well-mixed to obtain consistent readings.

Hello Mikael,

There seem to have fluctuations in the sensor readings. Have you tried to calibrate it first? Could you please give us a little bit more information?

Thanks!

Best regards,