How to pass 2 parameters with RCSwitch library?

Question

I'm learning Arduino's world, but knowing very little about C and C++.

I'm trying to achieve a little RF transmitter which should send the temperature and humidity from a DHT-11 sensor to a Raspberry Pi.

I'm using the RCSwitch library to send information with the Arduino, and the 433Utils library to receive it on the RPI.

Using those 2 libraries demos, I was able to send an integer, holding temperature or humidity information (mySwitch.send("00001010");), and read it on the RPI.

But how can I send both informations so that the RPI will know which one is the temperature and the humidity ?

I know I could just send both and assume the lowest is the temperature, but this would be very messy and not very rewarding.

EDIT :

Following Edgar's answer in https://arduino.stackexchange.com/a/52992/11604, I know write:

void send_string(const char *str){
    int i = 0;
    for (char *p = str; *p; p++ ) {     
        mySwitch.send((i<<8) + *p, 16);
        i++;
    }
}

void loop() {   
    delay(1000); 
    h=40.650;
    t=32.0078;  
    hic=33.586;     
    String x = "$H" + String(h) + "T" + String(t) + "HI" + String(hic); 
    send_string(x.c_str());
}

Works perfectly ! (see his complete answer for the RPI-side code)

Answer 1

The library you have chosen is not designed for transmitting information between nodes. It is intended for sending simple ON/OFF commands to RF-connected switches. Bending it to send data in the way you want would be difficult. Not impossible, but difficult.

Instead you should be considering a more suitable system, such as the popular RadioHead library. It appears to have Raspberry Pi support out of the box:

Raspberry Pi Uses BCM2835 library for GPIO http://www.airspayce.com/mikem/bcm2835/ Currently works only with RH_NRF24 driver or other drivers that do not require interrupt support. Contributed by Mike Poublon.

Alternatively a small Arduino as an interface between the RF module and the Pi may be another option.