Arduino Nano Every A0 voltage divider bridge

[riusmann]

Hi everyone,
I'm currently using the Arduino nano every in my application to :
-Communicate with the BMS equipped with a BQ2060 with SMBUS (already done)
-Confirm the presence of an NTC (that is on the BMS of my battery) with a voltage divider bridge.

My voltage divider bridge is supposed to give me a Vout around 2.5V (NTC = 10K and the other resistor is 10Kohms too)

The issue is that with the simple code that i have :

void setup() {
Serial.begin(9600);

}

void loop() {

int valeur = analogRead(A0);
float tension = valeur * (5.0 / 1024.0);
Serial.println(tension);
delay(250);

}

Here is the values that the nano gives me :

It's almost the same when the pack is unplug (starting at 2.7V and stagnate around 3.6V)

[gilshultz]

Post some type of schematic, I do not know how things are connected. Include links to technical information on all the hardware items as well.

[riusmann]

Hi gilshultz,
There is the shematics you asked :

I've just test the same thing on an arduino Uno and it's working well, the same wiring, same sketch, all the same system, so i guess it's not my wiring or something and it's linked with the nano every.
(I highlighted in red on the first picture so it's easier for you to understand)

[riusmann]

[hammy]

Not sure this is relevant , but by default the analog input uses the chip supply voltage as its reference - so if that changes , your reading may differ.
The power supply arrangements on the Every may differ to those on a UNO .
Some research needed

[riusmann]

I have another arduino nano every, going to test the same system and keep you informed.
Thanks for the help

[riusmann]

Hello all,
news about the topic. Problem resolved. It was just a defective arudino nano every.
Thanks you for the time you gave me.
See you
Riusman