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ESP32_Temperture-Node/.pio/libdeps/esp32doit-devkit-v1/Adafruit BusIO/examples/i2c_readwrite/i2c_readwrite.ino

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+#include <Adafruit_I2CDevice.h>
+
+#define I2C_ADDRESS 0x60
+Adafruit_I2CDevice i2c_dev = Adafruit_I2CDevice(I2C_ADDRESS);
+
+void setup() {
+  while (!Serial) {
+    delay(10);
+  }
+  Serial.begin(115200);
+  Serial.println("I2C device read and write test");
+
+  if (!i2c_dev.begin()) {
+    Serial.print("Did not find device at 0x");
+    Serial.println(i2c_dev.address(), HEX);
+    while (1)
+      ;
+  }
+  Serial.print("Device found on address 0x");
+  Serial.println(i2c_dev.address(), HEX);
+
+  uint8_t buffer[32];
+  // Try to read 32 bytes
+  i2c_dev.read(buffer, 32);
+  Serial.print("Read: ");
+  for (uint8_t i = 0; i < 32; i++) {
+    Serial.print("0x");
+    Serial.print(buffer[i], HEX);
+    Serial.print(", ");
+  }
+  Serial.println();
+
+  // read a register by writing first, then reading
+  buffer[0] = 0x0C; // we'll reuse the same buffer
+  i2c_dev.write_then_read(buffer, 1, buffer, 2, false);
+  Serial.print("Write then Read: ");
+  for (uint8_t i = 0; i < 2; i++) {
+    Serial.print("0x");
+    Serial.print(buffer[i], HEX);
+    Serial.print(", ");
+  }
+  Serial.println();
+}
+
+void loop() {}