use rust7::client::{S7Client};

fn main() {
    let mut client = S7Client::new();
    let db_number: u16 = 100; // Must exist into the PLC

    // Connection
    match client.connect_s71200_1500("192.168.0.100") {
        Ok(_) => { println!("Connected to PLC") },
        Err(e) => {
            eprintln!("Connection failed: {}", e);
            return;
        }
    }
    // Reads 64 byte from DB100
    println!("");
    println!("Attempt to read 64 byte from DB100");
    let mut read_buffer = vec![0u8; 64];
    match client.read_db(db_number, 0, &mut read_buffer) {
        Ok(_) => {          
            println!("Success!");
            println!("Job time (ms) : {:.3}", client.last_time);
        },
        Err(e) => eprintln!("Read failed: {}", e),
    }

    client.disconnect();
}