File content as of revision 4:85955eb2e61a:

// Common
#define CMD_GET_CONNECTION_STATUS 0x01  // OK
#define CMD_GET_SIGNAL_QUALITY    0x02  // OK
#define CMD_GET_DATETIME            0x03  // OK
#define CMD_ECHO_BACK               0x0f  // OK

// IO
#define CMD_READ_ADC              0x10  // OK

// Transmit
#define CMD_TX_ENQUEUE              0x20  // OK
#define CMD_TX_SENDIMMED          0x21  // OK
#define CMD_TX_LENGTH               0x22  // OK
#define CMD_TX_CLEAR                0x23  // OK
#define CMD_TX_SEND               0x24  // OK
#define CMD_TX_STAT               0x25  // OK

// Receive
#define CMD_RX_DEQUEUE            0x30  // OK
#define CMD_RX_PEEK               0x31  // OK
#define CMD_RX_LENGTH               0x32  // OK
#define CMD_RX_CLEAR                0x33  // OK

// File Download
#define CMD_START_FILE_DOWNLOAD       0x40  // OK
#define CMD_GET_FILE_METADATA         0x41  // OK
#define CMD_GET_FILE_DOWNLOAD_STATUS  0x42  // OK
#define CMD_CANCEL_FILE_DOWNLOAD      0x43  // OK
#define CMD_GET_FILE_DATA             0x44  // OK

// Operation
#define CMD_GET_PRODUCT_ID        0xA0  // OK
#define CMD_GET_UNIQUE_ID         0xA1  // OK
#define CMD_GET_FIRMWARE_VERSION  0xA2  // OK
#define CMD_UNLOCK                0xA8  // OK
#define CMD_UPDATE_FIRMWARE       0xA9  // OK
#define CMD_GET_UPDATE_FIRMWARE_STATUS       0xAA  // OK
#define CMD_SOFTWARE_RESET        0xAF  // OK


// Response
#define CMD_ERROR_NONE             0x01
#define CMD_ERROR_PARITY           0x02
#define CMD_ERROR_MISSING          0x03
#define CMD_ERROR_INVALID_SYNTAX   0x04
#define CMD_ERROR_RUNTIME          0x05
#define CMD_ERROR_LOCKED           0x06
#define CMD_ERROR_BUSY             0x07