#define OP_CONFIG_MIMO_REPLY (OP_CONFIG_MIMO | OP_REPLY_BIT)
#define OP_DBOARD_INFO 9
#define OP_DBOARD_INFO_REPLY (OP_DBOARD_INFO | OP_REPLY_BIT)
+#define OP_SYNC_TO_PPS 10
+#define OP_SYNC_TO_PPS_REPLY (OP_SYNC_TO_PPS | OP_REPLY_BIT)
//#define OP_WRITE_REG xx // not implemented