Help with Ads1115 and ESP32

Official Hardware Nano Family Nano ESP32
1

Hi Friends,
I’m trying to meausre load current load voltage of motor i used ads1115 with esp32 and i2c lcd with acs712 sensor and 0-25 v sensor (divder)

The current sensor out :2.45V and voltage sensor out is 0.97V which is I think is ok…
I connected sensors to to ads1115 I’m mean A0 and A1 and get sda and scl, then connected them to esp22 the 21 and 22 pin as well to the i2c lcd. I did the code and im getting 4.07V as VL and -2.47A as IL when the actual value I measured using the multimter is 4.39V and 0.19A.
Why Im getting such wrong result in the LCD?

2

Disconnect sensor signals from ADS1115 ADC. Use 3x1k network to divide 3.3V of ESP32 into 2.2 V and 1.1 V. Now feed 1.1 V into Ch-A0 and 2.2 V into Ch-A1 of ADS1115. Execute your codes and check that the LCD correctly shows 1.1 V and 2.2 V.

Now, proceed to find the troubles.

3

Either there is something wrong with your code or there is something with you hardware.