#define GRUNDIG_ADDRESS_OFFSET 0 // skip 2 bits (2nd start + 1 toggle)\r
#define GRUNDIG_ADDRESS_LEN 0 // read 5 address bits\r
#define GRUNDIG_COMMAND_OFFSET 1 // skip 2 bits (1 start bit)\r
#define GRUNDIG_ADDRESS_OFFSET 0 // skip 2 bits (2nd start + 1 toggle)\r
#define GRUNDIG_ADDRESS_LEN 0 // read 5 address bits\r
#define GRUNDIG_COMMAND_OFFSET 1 // skip 2 bits (1 start bit)\r