Si4703 FM radio receiver breakout con ESP32

Alimentazione 3.3 V Bus I2C Indirizzo I2C 0x10

Pin e collegamento all’ESP32

Pin	Ruolo	Pin ESP32	Note
GND	Massa	GND
3.3V	Alimentazione	3V3	3.3 V only
SDIO	Dati I2C (SDA)	D21	I2C data. Must be LOW when RST goes HIGH to choose I2C mode
SCLK	Clock I2C (SCL)	D22
SEN	Non collegato all’ESP32	—	Tie HIGH for I2C mode
RST	Ingresso (lo pilota l’ESP32)	D25	Reset, active LOW. Needed to start I2C mode
GPIO1	Non collegato all’ESP32	—	Optional
GPIO2	Interrupt	D35	Seek/tune complete interrupt, optional

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(0x10);
  bool found = Wire.endTransmission() == 0;
  Serial.println(found ? "Si4703 FM radio receiver breakout found at 0x10" : "Not found: check power, GND and SDA/SCL");
}

void loop() {}

Fonti

Silicon Labs Si4702/03-C19 datasheet, Bus mode selection with RST, SEN and SDIO; 2-wire address 0010000 (0x10)
Silicon Labs AN230 Si4700/01/02/03 programming guide, 2-wire reads start at register 0x0A
SparkFun Si4703 FM tuner breakout, Header order differs between boards: check the silkscreen

Provalo in 3D in BoardPilot

BoardPilot Dati del componente (JSON)

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