diff --git a/monitor/rfcomm.h b/monitor/rfcomm.h
index 38eaa99..32db90f 100644
--- a/monitor/rfcomm.h
+++ b/monitor/rfcomm.h
@@ -45,3 +45,35 @@ struct rfcomm_cmd {
 	uint8_t length;
 	uint8_t fcs;
 } __attribute__((packed));
+
+#define RFCOMM_TEST    0x08
+#define RFCOMM_FCON    0x28
+#define RFCOMM_FCOFF   0x18
+#define RFCOMM_MSC     0x38
+#define RFCOMM_RPN     0x24
+#define RFCOMM_RLS     0x14
+#define RFCOMM_PN      0x20
+#define RFCOMM_NSC     0x04
+
+#define RFCOMM_TEST_CR(type)		((type & 0x02))
+#define RFCOMM_GET_MCC_TYPE(type)	((type & 0xfc) >> 2)
+
+struct rfcomm_mcc {
+	uint8_t type;
+	uint8_t length;
+} __attribute__((packed));
+
+struct rfcomm_msc {
+	uint8_t dlci;
+	uint8_t v24_sig;
+} __attribute__((packed));
+
+struct rfcomm_pn {
+	uint8_t  dlci;
+	uint8_t  flow_ctrl;
+	uint8_t  priority;
+	uint8_t  ack_timer;
+	uint16_t mtu;
+	uint8_t  max_retrans;
+	uint8_t  credits;
+} __attribute__((packed));