HT16K33 8x8 LED matrix backpack (I2C) con ESP32

Alimentazione 3.3-5 V Bus I2C Indirizzo I2C 0x70 / 0x71 / 0x72 / 0x73 / 0x74 / 0x75 / 0x76 / 0x77

Pin e collegamento all’ESP32

Pin	Ruolo	Pin ESP32	Note
+	Alimentazione	3V3	Pin order varies between boards: match by the printed label. HT16K33 is rated 4.5 to 5.5 V. At 3V3 it usually works, dimmer
-	Massa	GND
D	Dati I2C (SDA)	D21	I2C data (SDA)
C	Clock I2C (SCL)	D22	I2C clock (SCL)

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(0x70);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "HT16K33 8x8 LED matrix backpack (I2C) found at 0x70" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Fonti

Holtek HT16K33 datasheet, Slave address 1110 A2 A1 A0; VDD 4.5 to 5.5 V
Adafruit LED Backpacks guide, 8x8 matrix backpack pinouts, address jumpers A0 to A2

Provalo in 3D in BoardPilot

BoardPilot Dati del componente (JSON)

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