INA3221 3-channel current + voltage monitor con ESP32

Alimentazione 3.3-5 V Bus I2C Indirizzo I2C 0x40 / 0x41 / 0x42 / 0x43 Misura corrente, tensione, potenza

Pin e collegamento all’ESP32

Pin	Ruolo	Pin ESP32	Note
VS	Alimentazione	3V3	Pin order differs between boards: check the silkscreen
GND	Massa	GND
SCL	Clock I2C (SCL)	D22
SDA	Dati I2C (SDA)	D21
WAR	Interrupt	D35	Warning alert, open drain. Optional
CRI	Interrupt	VP	Critical alert, open drain. Optional
TC	Non collegato all’ESP32	—	Timing control alert. Leave unconnected
PV	Non collegato all’ESP32	—	Power valid alert. Leave unconnected
IN1+	Non collegato all’ESP32	—	Channel 1 from the supply. Measured circuit only, up to 26 V
IN1-	Non collegato all’ESP32	—	Channel 1 to the load
IN2+	Non collegato all’ESP32	—	Channel 2 from the supply
IN2-	Non collegato all’ESP32	—	Channel 2 to the load
IN3+	Non collegato all’ESP32	—	Channel 3 from the supply
IN3-	Non collegato all’ESP32	—	Channel 3 to the load

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 ? "INA3221 3-channel current + voltage monitor found at 0x40" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Fonti

Texas Instruments INA3221 datasheet, Address pin A0 to GND/VS/SDA/SCL = 0x40/0x41/0x42/0x43
Texas Instruments INA3221 datasheet, Bus voltage 0 to 26 V; shunt range ±163.84 mV

Provalo in 3D in BoardPilot

BoardPilot Dati del componente (JSON)

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