module dht11_interface (
    input wire          i_clk, // 27 MHz
    inout wire          io_dht11_sig,
    output wire         o_dht11_data_ready,
    output wire [7:0]   o_temp_data,
    output wire [7:0]   o_hum_data,
    output wire         o_dht11_error
);

    // === DHT11 INTERFACE ===
    // Le module DHT11 est connecté à la broche io_dht11_sig.
    // La communication se fait en mode bidirectionnel.

    wire sig_dir;
    wire sig_out;
    
    assign io_dht11_sig = sig_dir ? sig_out : 1'bz;


    // === FSM ===
    localparam  IDLE            = 3'd0, // Pull up la ligne

                START           = 3'd1, // Pull low 18ms
                WAIT_RESPONSE   = 3'd2, // Release la ligne (entre 20 et 40us)

                READ_HUM_INT    = 3'd3, 
                READ_HUM_DEC    = 3'd4;
                READ_TEMP_INT   = 3'd5, 
                READ_TEMP_DEC   = 3'd6,
                READ_CHECKSUM   = 3'd7, // Last 8 bits of {1st Byte + 2nd Byte + 3rd Byte+ 4th Byte}

                DONE            = 3'd8;
               

endmodule