INA219 Sensor wrong data display

[Rihab]

Hello Community,

I'm using the current sensor INA219 with NRF5340dk.
Communication is through i²c protocol and using nrf SDK v1.7.0 .
I'm trying to get the data output (Voltage, Current, Power).
i worked on the sample linked on Zephyr Lib. the problem is that i'm always getting the same output which i liked below

the wiring of the sensor is like below :

Vin->VDD nrf
GND->GND
SCL->P0.26
SDA->P0.25

I'm always getting the current and power to Null values and both voltage values don't change no matter what !
do i need to change the calibration values or do i need to do something else ?
i don't get what's wrong with the data output so i need your help please
can you help me get the right values and get the data displayed out from the sensor correctly, please

Kindly,
Many thanks
 

[Dmitry]

Hi,

INA219 examle in Zephyr writes very strange (IMHO incorrect) value into configuration register. Try to replace it with default one:

	/* Configurate the chip using default values */
	data[0] = 0x39;
	data[1] = 0x9f;

[Rihab]

i already changed that before i putted the message on the forum 
for now i changed the pins and changed my overlay file according to the new pin numbers 
and i always took the comment of Dmitry in consideration and i changed the addresses and now it's being so strange 

[Rihab]

My project is about 4 assembled sensors that work when a button is pressed 
the project recover data each 5s and then it stores it somewhere on the cloud 
here's a snip from the project properties 

do you think it's easy to migrate on the V1.8.0 or will it be complicated ? 

[Øivind]

It doesn't sound like it should pose much of an issue.

Those numbers aren't really helpful as most of it is the build folder.

You can make a new private ticket about upgrading your project to v1.8.0, and I can help you with that there.

Were you able to get the v1.8.0 version of the INA219 sample working? You probably need to add an overlay file with a "ti,ina219" node to get the driver working.

[Rihab]

ok thanks for the suggestion 
well i just finished downloading and searching but in fact under: ncs\v1.8.0\zephyr\samples\drivers\current_sensing 
there's only the CMakeLists.txt 
should i import the rest from the old version ? 

[Øivind]

The new sample is zephyr/samples/sensor/ina219

I think if you add this to an overlay file and add it to the sample, it should work:

&i2c1 {

	ina219@40 {
		status = "okay";
		compatible = "ti,ina219";
		reg = <0x40>;
		label = "INA219";
		brng = <0>;
		pg = <0>;
		sadc = <13>;
		badc = <13>;
		shunt-milliohm = <100>;
		lsb-microamp = <10>;
	};
};

[Rihab]

Hello, 
thank you for the suggestion 
i did my overlay file and it looks like this 

&i2c1 {
	status = "okay";
	sda-pin = < 34 >;
	scl-pin = < 35 >;
    clock-frequency = <100000>; 
	
	ina219@40 {
		status = "okay";
		compatible = "ti,ina219";
		reg = <0x40>;
		label = "INA219";
		brng = <0>;
		pg = <0>;
		sadc = <13>;
		badc = <13>;
		shunt-milliohm = <100>;
		lsb-microamp = <10>;
	};
};

&uart1 {
    status = "disabled";
};

but i'm not able to open the project 

is there an issue in the overlay file ?

[Øivind]

Did you open SES using the button next to v1.8.0 in the Toolchain Manager?