A4s inaccurate voltage readings

[mvtech2430]

Hello, i have a 24v water level sensor connected to AI1 0-5v output

my reading on my voltmeter is 27100mv = 0.271v 

but the reading in esphome is not accurate see image

[admin]

check some setting of ESP32 board, see here: https://esphome.io/components/sensor/adc.html