diff --git a/lispBM/c_libs/lbm_if.h b/lispBM/c_libs/lbm_if.h
index 03b71b4a..41b4e957 100755
--- a/lispBM/c_libs/lbm_if.h
+++ b/lispBM/c_libs/lbm_if.h
@@ -58,11 +58,12 @@ typedef lbm_value (*extension_fptr)(lbm_value*,lbm_uint);
 #define LBM_TYPE_U64                     0x50000000u
 #define LBM_TYPE_FLOAT                   0x60000000u
 #define LBM_TYPE_DOUBLE                  0x70000000u
-#define LBM_TYPE_ARRAY                   0xD0000000u
-#define LBM_TYPE_REF                     0xE0000000u
-#define LBM_TYPE_STREAM                  0xF0000000u
-#define LBM_NON_CONS_POINTER_TYPE_LAST   0xF0000000u
-#define LBM_POINTER_TYPE_LAST            0xF0000000u
+#define LBM_TYPE_ARRAY                   0x80000000u
+#define LBM_TYPE_REF                     0x90000000u
+#define LBM_TYPE_STREAM                  0xA0000000u
+#define LBM_TYPE_CUSTOM                  0xB0000000u
+#define LBM_NON_CONS_POINTER_TYPE_LAST   0xB0000000u
+#define LBM_POINTER_TYPE_LAST            0xB0000000u
 
 #define LBM_GC_MASK                      0x00000002u
 #define LBM_GC_MARKED                    0x00000002u
diff --git a/lispBM/c_libs/vesc_c_if.h b/lispBM/c_libs/vesc_c_if.h
index 4a1bf402..ca5ef794 100755
--- a/lispBM/c_libs/vesc_c_if.h
+++ b/lispBM/c_libs/vesc_c_if.h
@@ -137,6 +137,23 @@ typedef enum {
 	VESC_PIN_MODE_ANALOG,
 } VESC_PIN_MODE;
 
+#ifndef PACKET_MAX_PL_LEN
+#define PACKET_MAX_PL_LEN		512
+#endif
+
+#define PACKET_BUFFER_LEN		(PACKET_MAX_PL_LEN + 8)
+
+// Types
+typedef struct {
+	void(*send_func)(unsigned char *data, unsigned int len);
+	void(*process_func)(unsigned char *data, unsigned int len);
+	unsigned int rx_read_ptr;
+	unsigned int rx_write_ptr;
+	int bytes_left;
+	unsigned char rx_buffer[PACKET_BUFFER_LEN];
+	unsigned char tx_buffer[PACKET_BUFFER_LEN];
+} PACKET_STATE_t;
+
 /*
  * Function pointer struct. Always add new function pointers to the end in order to not
  * break compatibility with old binaries.
@@ -287,6 +304,14 @@ typedef struct {
 	bool (*lbm_unblock_ctx)(lbm_cid, lbm_value);
 	lbm_cid (*lbm_get_current_cid)(void);
 
+	// Packets
+	void (*packet_init)(void (*s_func)(unsigned char *, unsigned int),
+			 void (*p_func)(unsigned char *, unsigned int),
+			 PACKET_STATE_t *);
+	void (*packet_reset)(PACKET_STATE_t *);
+	void (*packet_process_byte)(uint8_t, PACKET_STATE_t *);
+	void (*packet_send_packet)(unsigned char *, unsigned int len, PACKET_STATE_t *);
+
 } vesc_c_if;
 
 typedef struct {
diff --git a/lispBM/lispif_c_lib.c b/lispBM/lispif_c_lib.c
index 68806a60..f3d8ebfb 100644
--- a/lispBM/lispif_c_lib.c
+++ b/lispBM/lispif_c_lib.c
@@ -31,6 +31,14 @@
 #include "app.h"
 #include "mempools.h"
 
+// Function prototypes otherwise missing
+void packet_init(void (*s_func)(unsigned char *data, unsigned int len),
+		void (*p_func)(unsigned char *data, unsigned int len), PACKET_STATE_t *state);
+void packet_reset(PACKET_STATE_t *state);
+void packet_process_byte(uint8_t rx_data, PACKET_STATE_t *state);
+void packet_send_packet(unsigned char *data, unsigned int len, PACKET_STATE_t *state);
+
+
 typedef struct {
 	char *name;
 	void *arg;
@@ -493,6 +501,12 @@ lbm_value ext_load_native_lib(lbm_value *args, lbm_uint argn) {
 		cif.cif.lbm_unblock_ctx = lbm_unblock_ctx;
 		cif.cif.lbm_get_current_cid = lbm_get_current_cid;
 
+                //packets
+                cif.cif.packet_init = packet_init;
+                cif.cif.packet_reset = packet_reset;
+                cif.cif.packet_process_byte = packet_process_byte;
+                cif.cif.packet_send_packet = packet_send_packet;
+
 		lib_init_done = true;
 	}