Is it possible to send a float Array over I2c
Below is a simple rewrite of the Master Writer/Slave Receiver Wire Tutorial, https://www.arduino.cc/en/Tutorial/MasterWriter, for a vector of floating-point numbers.

Master Writer Sketch

#include &lt;Wire.h&gt;

const int DEVICE = 8;

void setup() {
  Wire.begin();
  Serial.begin(9600);
}

void loop() {
  const int VEC_MAX = 6;
  float vec[VEC_MAX];
  uint8_t* vp = (uint8_t*) vec;

  Wire.requestFrom(DEVICE, sizeof(vec));
  while (Wire.available()) {
    *vp++ = Wire.read();
  }

  for (int i = 0; i &lt; VEC_MAX; i++) {
    Serial.println(vec[i]);
  }

  delay(500);
}


Slave Receiver Sketch

#include &lt;Wire.h&gt;

const int DEVICE = 8;
const int VEC_MAX = 6;
float vec[VEC_MAX] = { ... };

void setup() {
  Wire.begin(DEVICE);
  Wire.onRequest(requestEvent);
}

void loop() {
  delay(100);
}

void requestEvent() {
  Wire.write((uint8_t*) vec, sizeof(vec));
}



  Is it possible to send a float Array over I2c


So I would answer - Yes.