So, I have an ATTiny85 sending data, awesome. I would like to have it send a message that consists of a few concatenated parts.

I have been reading about strings, buffers, chars, toCharArray and more for about 6 hours now and am completely puzzled by this.

Below, the variable deze will no transmit, but msg will. So I tried to do something like char *deze = "hello" + "world"; but that also fails.

What would be the best way to construct a piece of data that will be send by my 433MHz transmitter. I need to combine INT, String and float before sending it as uint8_t (bytes?).

#include <RH_ASK.h>

#define R_PIN PB4
#define T_PIN PB1
#define L_PIN PB3

RH_ASK driver(2000, R_PIN, T_PIN);

void setup()
{
  if (!driver.init()){
    pinMode(L_PIN, OUTPUT);
    digitalWrite(L_PIN, HIGH);
    delay(500);
    digitalWrite(L_PIN, LOW);
    delay(500);
  }
}

void loop()
{
  char deze[5];
  char *msg = "gewonechar";

  String thijs = "thijs";
  thijs.toCharArray(deze, sizeof(deze)-1);
  
  driver.send((uint8_t *)deze, strlen(msg));
  driver.waitPacketSent();
  delay(200);
}

[edit]
This works but may be very wrong to do :)

void loop()
{
  char analog[4];
  char bericht[10];
  
  strcpy(bericht, "thijs");
  
  float lezing = analogRead(PB3);
  itoa(lezing, analog, 10);
  
  strcat(bericht, analog);

  driver.send((uint8_t *)bericht, strlen(bericht));
  driver.waitPacketSent();
  delay(200);
}