/*
   redirect binary output to Serial to make output readable in HEX characters

   2022-12-08 https://forum.arduino.cc/t/float-uber-tcp-an-sps-senden/1062880/
*/
class DumpInHex : public Print{
  public:
  using Print::write;
  size_t write(uint8_t c)
  {
    if (c <10 ) Serial.print('0');
    Serial.print(c, HEX);
    Serial.print(' ');
  }
};

DumpInHex client;

float temp = 12.34;
float humidity = 56.78;
uint32_t counter = 123456;

void setup() {
  Serial.begin(115200);
  client.write((const uint8_t *) & temp, sizeof(temp));
  client.write((const uint8_t *) & humidity, sizeof(humidity));
  client.write((const uint8_t *) & counter, sizeof(counter));
}

void loop() {
  // put your main code here, to run repeatedly:

}