Blynk app isn't displaying sensor values

[PeteKnight]

@Subhasish

int Master = 27;
int Slave = 13;

You’ve chosen pins for your sensors that are internally connected to ADC2, which can’t be used at the same time as WiFi.

Read this link…

Connecting Blynk and ESP32

The reason that your sensors work without Blynk, but won’t work with Blynk is that you’ve chosen analog pins that are connected to the ESP33’s ADC2 analog to digital converter. The ESP32 architecture doesn’t allow ADC2 to be used at the same time as WiFi. You should choose pins that are connected to ADC1 instead… ADC1_CH0 (GPIO 36) ADC1_CH1 (GPIO 37) ADC1_CH2 (GPIO 38) ADC1_CH3 (GPIO 39) ADC1_CH4 (GPIO 32) ADC1_CH5 (GPIO 33) ADC1_CH6 (GPIO 34) ADC1_CH7 (GPIO 35) Read this for more info… B…

and change your wiring and code to use ADC1 pins.

Pete.