INA219 current + voltage monitor con ESP32

Alimentazione 3.3-5 V Bus I2C Indirizzo I2C 0x40 / 0x41 / 0x44 / 0x45 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
VIN-	Non collegato all’ESP32	—	To the load. Measured circuit only, up to 26 V
VIN+	Non collegato all’ESP32	—	From the supply. Measured circuit only, up to 26 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 ? "INA219 current + voltage monitor found at 0x40" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Fonti

Texas Instruments INA219 datasheet, Serial bus address: A0/A1 select 0x40 to 0x4F (boards expose 0x40, 0x41, 0x44, 0x45)
Texas Instruments INA219 datasheet, Bus voltage range 0 to 26 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.