ESP32C6 - ADC Measuring 230V from Voltage Sensor (IDFGH-12828)

[Hariprabhu13]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Hi ,

                        Board                  - ESP32C6
                        Version                - V5.1.1
                        Voltage Sensor         - ZMPT101B

I have the issue in reading the raw data in ADC Driver at calibration stage , the ADC_CHANNEL_2 has been set to read the Voltage sensor raw data . I have the refer the espidf documentation and initialize the adc driver ,

setting the adc calibration curve fitting and read the raw data in the adc_oneshot_read() API, it showing every time as 4081.

After converting the raw to Voltage it is in 4000mV.

Suggest me how to read the Voltage Sensor raw data in esp32c6 adc driver for getting the voltage measurement for 230V AC.

Thank you.