INA226 current + voltage monitor con ESP32

Alimentazione 3.3-5 V Bus I2C Indirizzo I2C 0x40 / 0x41 / 0x42 / 0x43 / 0x44 / 0x45 / 0x46 / 0x47 / 0x48 / 0x49 / 0x4A / 0x4B / 0x4C / 0x4D / 0x4E / 0x4F Misura corrente, tensione, potenza

Pin e collegamento all’ESP32

Pin	Ruolo	Pin ESP32	Note
VCC	Alimentazione	3V3
GND	Massa	GND
SCL	Clock I2C (SCL)	D22
SDA	Dati I2C (SDA)	D21
ALE	Interrupt	D35	Alert output, optional
VBS	Non collegato all’ESP32	—	Bus voltage sense. Usually linked to IN- on the board
IN-	Non collegato all’ESP32	—	To the load. Measured circuit only, up to 36 V
IN+	Non collegato all’ESP32	—	From the supply. Measured circuit only, up to 36 V

Collegamento consigliato per l’ESP32 DevKit a 30 pin, evitando i pin della flash, di sola lettura e di strapping. BoardPilot lo controlla mentre colleghi.

Codice di partenza (Arduino)

#include <Wire.h>

void setup() {
  Serial.begin(115200);
  Wire.begin(21, 22);  // SDA = GPIO 21, SCL = GPIO 22
  Wire.beginTransmission(0x40);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "INA226 current + voltage monitor found at 0x40" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Fonti

Texas Instruments INA226 datasheet, Serial bus address: A0/A1 select 0x40 to 0x4F
Texas Instruments INA226 datasheet, Bus voltage 0 to 36 V

Provalo in 3D in BoardPilot

BoardPilot Dati del componente (JSON)

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Dati dei componenti: CC BY 4.0, riutilizzabili citando BoardPilot.