ESP8266 can't find INA 219 chip

Projects General Guidance
1

hi I'm doing a school project where i use a Solar Panel that send data to an ESP8266 using INA219 and F031-06 Voltage Sensor; then everything get sent to an database.
the problem is that ESP can't find the INA.
Can someone help me?
thanks.

WhatsApp Image 2024-05-30 at 15.22.32 (1)
WhatsApp Image 2024-05-30 at 15.22.32 (1)1920×1080 161 KB

I' ve used this image as an example:
in LOAD i used a led;
instead of using arduino I've used ESP8266;
instead of using INA169 I've used INA219.
HERE'S THE CODE

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <Wire.h>
#include <Adafruit_INA219.h>

Adafruit_INA219 ina219;

#define LED_RED 5

int contatore = 0;

const char* ssid = "zubir's_wify";
const char* password = "zubir567891011";
const char* web_server = "192.168.115.105";

String postData = "";
String payload = "";
String send_Status_Read_INA219 = "";

float shuntvoltage = 0;
float busvoltage = 0;
float current_mA = 0;
float loadvoltage = 0;
float power_mW = 0;
  
void setup() {
  pinMode(LED_RED, OUTPUT);
  digitalWrite(LED_RED, HIGH);
  Serial.begin(115200);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  Serial.println();
  Serial.println("--------");
  Serial.print("Connecting");

  int connecting_process_timed_out = 20;

  while (WiFi.status() != WL_CONNECTED && connecting_process_timed_out > 0) {
    Serial.print(".");
    digitalWrite(LED_RED, HIGH);
    delay(500);
    digitalWrite(LED_RED, LOW);
    delay(500);
    connecting_process_timed_out--;
  }

  if (connecting_process_timed_out == 0) {
    ESP.restart();
  }

  digitalWrite(LED_RED, HIGH);
  Serial.println();
  Serial.print("Successfully connected to: ");
  Serial.println(ssid);
  Serial.println("--------");

  if (!ina219.begin()) {
    Serial.println("Failed to find INA219 chip");
    while (1) { delay(10); }
  } else {
    Serial.println("INA219 sensor initialized");
  }

  ina219.setCalibration_32V_2A();

}


void loop() {
  WiFiClient Client;
  HTTPClient http;
  int httpCode;
  contatore = contatore + 1;

  Serial.print("primo invio: ");
  Serial.println(contatore);
  Serial.println();
  Serial.println("----------getdata.php");


  postData = "id=Progetto";
  http.begin(Client, "http://" + (String(web_server)) + "/esp8266/getdata.php");
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  httpCode = http.POST(postData);
  payload = http.getString();

  Serial.print("httpCode: ");
  Serial.println(httpCode);
  Serial.print("payload : ");
  Serial.println(payload);

  http.end();  
  Serial.println("-----------");

  shuntvoltage = ina219.getShuntVoltage_mV();
  busvoltage = ina219.getBusVoltage_V();
  current_mA = ina219.getCurrent_mA();
  power_mW = ina219.getPower_mW();
  loadvoltage = busvoltage + (shuntvoltage / 1000);

  Serial.print("Shunt Voltage: "); Serial.print(shuntvoltage); Serial.println(" mV");
  Serial.print("Bus Voltage: "); Serial.print(busvoltage); Serial.println(" V");
  Serial.print("Current: "); Serial.print(current_mA); Serial.println(" mA");
  Serial.print("Power: "); Serial.print(power_mW); Serial.println(" mW");
  Serial.print("Load Voltage: "); Serial.print(loadvoltage); Serial.println(" V");


  send_Status_Read_INA219 = "SUCCEED";

  postData = "id=Progetto";
  postData += "&busvoltage=" + String(busvoltage);
  postData += "&shuntvoltage=" + String(shuntvoltage);
  postData += "&current_mA=" + String(current_mA);
  postData += "&loadvoltage=" + String(loadvoltage);
  postData += "&power_mW=" + String(power_mW);
  postData += "&status_read_sensor_ina219=" + send_Status_Read_INA219;

  Serial.print("postData: ");
  Serial.println(postData);


  http.begin(Client, "http://" + (String(web_server)) + "/esp8266/getdata.php");
  http.addHeader("Content-Type", "application/x-www-form-urlencoded");
  httpCode = http.POST(postData);
  payload = http.getString();

  Serial.print("httpCode: ");
  Serial.println(httpCode);
  Serial.print("payload : ");
  Serial.println(payload);

  http.end();  
  Serial.println("-----------");
  delay(2000);
}
2

Load and run an I2C Scanner program and see if the INA219 is detected.

The I2C scanner should show the I2C address of all connected i2C devices.

3

How do i do that?

4

Try a Google serach on;

esp8266 i2c scanner

5

it's says

No I2C devices found

6

The 2 devices are not properly connected to the controller.
I2C is a 2 wire bus plus common GND is needed.

7

i've removed everything i left only esp8266 and INA219, still no i2c devices found

8

btw im using a breadboard

9

Please read and consider reply #6.

Please grab pen and paper and draw how the I2C bus is connected. It is incomplete in the Fritzing picture.

10

Maybe try the scanner with another I2C device that you know is working with your esp8266.

11

this is the connections between ESP8266 and INA219
Do you need the other coonections with PV panel and voltage sensor?

WhatsApp Image 2024-06-05 at 19.40.33
WhatsApp Image 2024-06-05 at 19.40.33901×1600 50 KB

12

ok i'll try

13

Thanks!
That's okey. The first pic didn't look like that.
Check the INA219 datasheet that it runs from 3.3 volt.

14

The official datasheet of the INA219 confirms that the device can operate over a wide range of supply voltages, including 3.3V and 5V.

15

Do your SDA and SCL lines have pullup resistors anywhere?

16

i don't know, where do i need to look?

17

I could and did check that now. It's correct.

Reply #15 ask about pullup resistors. No such in Your schematics.

Not knowing the esp8266 I ask if SDA and SCK are present at the pins You use?

18

no there aren't, but there's RX and TX

19

now im trying this with an oled dispay

20

Oops. They are nor ekvivalent, not the same, have nothing in common.
Micro controllers can often be configured, using pins, for different purposes.

I have never used an esp8266..... Check its datasheet, libraries, for esp8266+I2C for the correct pins.