diff --git a/grid_common/grid_littlefs.c b/grid_common/grid_littlefs.c
index 2e64a799e..572daa805 100644
--- a/grid_common/grid_littlefs.c
+++ b/grid_common/grid_littlefs.c
@@ -564,4 +564,4 @@ int grid_littlefs_closedir(lfs_t* lfs, lfs_dir_t* dirp) {
 
 struct lfs_info READDIR = {0};
 
-const char* grid_littlefs_readdir(lfs_t* lfs, lfs_dir_t* dirp) { return lfs_dir_read(lfs, dirp, &READDIR) > 0 ? READDIR.name : NULL; }
+char* grid_littlefs_readdir(lfs_t* lfs, lfs_dir_t* dirp) { return lfs_dir_read(lfs, dirp, &READDIR) > 0 ? READDIR.name : NULL; }
diff --git a/grid_common/grid_littlefs.h b/grid_common/grid_littlefs.h
index 0f0ca70f4..312d3dd7c 100644
--- a/grid_common/grid_littlefs.h
+++ b/grid_common/grid_littlefs.h
@@ -36,6 +36,6 @@ ssize_t grid_littlefs_fseek(lfs_t* lfs, lfs_file_t* stream, lfs_soff_t soff, int
 int grid_littlefs_fflush(lfs_t* lfs, lfs_file_t* stream);
 lfs_dir_t* grid_littlefs_opendir(lfs_t* lfs, const char* name);
 int grid_littlefs_closedir(lfs_t* lfs, lfs_dir_t* dirp);
-const char* grid_littlefs_readdir(lfs_t* lfs, lfs_dir_t* dirp);
+char* grid_littlefs_readdir(lfs_t* lfs, lfs_dir_t* dirp);
 
 #endif /* GRID_LITTLEFS_H */
diff --git a/grid_common/grid_lua.c b/grid_common/grid_lua.c
index b14b570d6..4a1571499 100644
--- a/grid_common/grid_lua.c
+++ b/grid_common/grid_lua.c
@@ -109,7 +109,7 @@ void grid_lua_clear_stdo(struct grid_lua_model* lua) { memset(lua->stdo, 0, lua-
 
 void grid_lua_clear_stde(struct grid_lua_model* lua) { memset(lua->stde, 0, lua->stde_len); }
 
-int grid_lua_append_stdo(struct grid_lua_model* lua, char* str) {
+int grid_lua_append_stdo(struct grid_lua_model* lua, const char* str) {
 
   int curr = strnlen(lua->stdo, lua->stdo_len);
 
@@ -126,7 +126,7 @@ int grid_lua_append_stdo(struct grid_lua_model* lua, char* str) {
   return 0;
 }
 
-int grid_lua_append_stde(struct grid_lua_model* lua, char* str) {
+int grid_lua_append_stde(struct grid_lua_model* lua, const char* str) {
 
   int curr = strnlen(lua->stde, lua->stde_len);
 
diff --git a/grid_common/grid_lua.h b/grid_common/grid_lua.h
index 2fbff1ab2..a4b09760c 100644
--- a/grid_common/grid_lua.h
+++ b/grid_common/grid_lua.h
@@ -63,8 +63,8 @@ void grid_lua_clear_stdi(struct grid_lua_model* lua);
 void grid_lua_clear_stdo(struct grid_lua_model* lua);
 void grid_lua_clear_stde(struct grid_lua_model* lua);
 
-int grid_lua_append_stdo(struct grid_lua_model* lua, char* str);
-int grid_lua_append_stde(struct grid_lua_model* lua, char* str);
+int grid_lua_append_stdo(struct grid_lua_model* lua, const char* str);
+int grid_lua_append_stde(struct grid_lua_model* lua, const char* str);
 
 char* grid_lua_get_output_string(struct grid_lua_model* lua);
 char* grid_lua_get_error_string(struct grid_lua_model* lua);
diff --git a/grid_common/grid_lua_api.c b/grid_common/grid_lua_api.c
index e81363969..0ca9bf13b 100644
--- a/grid_common/grid_lua_api.c
+++ b/grid_common/grid_lua_api.c
@@ -411,7 +411,7 @@ int l_grid_cat(lua_State* L) {
     return 0;
   }
 
-  char* name = lua_tostring(L, 2);
+  const char* name = lua_tostring(L, 2);
 
   if (strlen(name) > GRID_ELEMENT_NAME_MAX) {
     return 0;
@@ -937,7 +937,6 @@ int l_grid_cat(lua_State* L) {
 
     uint16_t offset = GRID_CLASS_MIDISYSEX_PAYLOAD_offset + i * 2 - 2;
     uint8_t length = GRID_CLASS_MIDISYSEX_PAYLOAD_length;
-    uint8_t* dest = (uint8_t*)&frame[GRID_CLASS_MIDISYSEX_PAYLOAD_offset + i * 2 - 2];
     grid_frame_set_parameter((uint8_t*)frame, offset, length, lua_tointeger(L, i));
   }
 
diff --git a/grid_common/grid_msg.c b/grid_common/grid_msg.c
index b0ab94d14..131eaac24 100644
--- a/grid_common/grid_msg.c
+++ b/grid_common/grid_msg.c
@@ -95,7 +95,7 @@ void print_u32(uint8_t x) {
   grid_platform_printf("\n");
 }
 
-uint8_t grid_frame_calculate_checksum_string(uint8_t* frame, size_t length) {
+uint8_t grid_frame_calculate_checksum_string(const uint8_t* frame, size_t length) {
 
   /*
   uint8_t u8 = 0;
@@ -131,7 +131,7 @@ uint8_t grid_frame_calculate_checksum_string(uint8_t* frame, size_t length) {
   return u8;
 }
 
-uint8_t grid_frame_calculate_checksum_packet(uint8_t* frame, size_t length) {
+uint8_t grid_frame_calculate_checksum_packet(const uint8_t* frame, size_t length) {
 
   assert(length > 3);
 
@@ -303,7 +303,7 @@ int grid_msg_nprintf(struct grid_msg* msg, const char* fmt, ...) {
   return n >= remain ? -1 : n;
 }
 
-int grid_msg_add_segment_char(struct grid_msg* msg, uint8_t head_hexes, uint32_t size, char* buffer) {
+int grid_msg_add_segment_char(struct grid_msg* msg, uint8_t head_hexes, uint32_t size, const char* buffer) {
 
   assert(msg->length <= GRID_MSG_BYTES);
 
@@ -358,8 +358,6 @@ int grid_msg_add_debugtext(struct grid_msg* msg, const char* text) {
 
   uint32_t length_prev = msg->length;
 
-  bool success = true;
-
   if (grid_msg_add_frame(msg, GRID_CLASS_DEBUGTEXT_frame_start) < 0) {
     goto grid_msg_add_debugtext_revert;
   }
diff --git a/grid_common/grid_msg.h b/grid_common/grid_msg.h
index 08f9ba9da..282731d47 100644
--- a/grid_common/grid_msg.h
+++ b/grid_common/grid_msg.h
@@ -44,8 +44,8 @@ uint8_t grid_msg_get_heartbeat_type(struct grid_msg_model* msg);
 void grid_msg_set_editor_heartbeat_lastrealtime(struct grid_msg_model* msg, uint64_t timestamp);
 uint64_t grid_msg_get_editor_heartbeat_lastrealtime(struct grid_msg_model* msg);
 
-uint8_t grid_frame_calculate_checksum_string(uint8_t* frame, size_t length);
-uint8_t grid_frame_calculate_checksum_packet(uint8_t* frame, size_t length);
+uint8_t grid_frame_calculate_checksum_string(const uint8_t* frame, size_t length);
+uint8_t grid_frame_calculate_checksum_packet(const uint8_t* frame, size_t length);
 
 uint32_t grid_frame_get_parameter(const uint8_t* frame, uint16_t offset, uint8_t length);
 void grid_frame_set_parameter(uint8_t* frame, uint16_t offset, uint8_t length, uint32_t value);
@@ -72,7 +72,7 @@ int grid_msg_close(struct grid_msg* msg);
 void grid_msg_init_brc(struct grid_msg_model* model, struct grid_msg* msg, uint8_t dx, uint8_t dy);
 int grid_msg_close_brc(struct grid_msg_model* model, struct grid_msg* msg);
 int grid_msg_nprintf(struct grid_msg* msg, const char* fmt, ...);
-int grid_msg_add_segment_char(struct grid_msg* msg, uint8_t head_hexes, uint32_t size, char* buffer);
+int grid_msg_add_segment_char(struct grid_msg* msg, uint8_t head_hexes, uint32_t size, const char* buffer);
 int grid_msg_add_hex_bytes(struct grid_msg* msg, uint8_t* data, uint16_t length);
 int grid_msg_add_debugtext(struct grid_msg* msg, const char* text);
 int grid_msg_move(struct grid_msg* dest, struct grid_msg* src);
diff --git a/grid_common/grid_ui.c b/grid_common/grid_ui.c
index 612654e80..36d535b5d 100644
--- a/grid_common/grid_ui.c
+++ b/grid_common/grid_ui.c
@@ -590,7 +590,7 @@ void grid_ui_event_render_action(struct grid_ui_event* eve, struct grid_msg* msg
   }
 
   char* stdo = grid_lua_get_output_string(&grid_lua_state);
-  int ret = grid_msg_nprintf(msg, "%s", stdo);
+  grid_msg_nprintf(msg, "%s", stdo);
   grid_lua_clear_stdo(&grid_lua_state);
 
   grid_lua_clear_stde(&grid_lua_state);
@@ -926,6 +926,9 @@ void grid_ui_bulk_flush(struct grid_ui_model* ui) {
   }
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+
 PT_THREAD(grid_ui_bulk_page_load(proto_pt_t* pt, struct grid_ui_model* ui)) {
 
   // Reset all state parameters of all leds
@@ -1292,3 +1295,5 @@ PT_THREAD(grid_ui_bulk_nvm_erase(proto_pt_t* pt, struct grid_ui_model* ui)) {
 
   PT_END(pt);
 }
+
+#pragma GCC diagnostic pop
diff --git a/grid_esp/components/grid_esp32_led/grid_esp32_led.c b/grid_esp/components/grid_esp32_led/grid_esp32_led.c
index df7877cd7..5ef2ddf01 100644
--- a/grid_esp/components/grid_esp32_led/grid_esp32_led.c
+++ b/grid_esp/components/grid_esp32_led/grid_esp32_led.c
@@ -6,8 +6,6 @@
 
 #include "grid_esp32_led.h"
 
-static const char* TAG = "LED";
-
 static DRAM_ATTR rmt_channel_handle_t CHANNEL = NULL;
 static DRAM_ATTR rmt_encoder_handle_t ENCODER = NULL;
 
diff --git a/grid_esp/components/grid_esp32_port/grid_esp32_port.c b/grid_esp/components/grid_esp32_port/grid_esp32_port.c
index 2b7e1b6b8..56a75794f 100644
--- a/grid_esp/components/grid_esp32_port/grid_esp32_port.c
+++ b/grid_esp/components/grid_esp32_port/grid_esp32_port.c
@@ -360,7 +360,7 @@ void handle_connection_effect() {
 
 bool grid_esp32_broadcast_between(enum grid_port_type t1, enum grid_port_type t2) { return !(t1 == GRID_PORT_USART && t2 == GRID_PORT_USART); }
 
-extern bool rp2040_active = false;
+bool rp2040_active = false;
 
 void grid_esp32_port_task(void* arg) {
 
diff --git a/grid_esp/components/grid_esp32_usb/grid_esp32_usb.c b/grid_esp/components/grid_esp32_usb/grid_esp32_usb.c
index be97e8879..7d8f63682 100644
--- a/grid_esp/components/grid_esp32_usb/grid_esp32_usb.c
+++ b/grid_esp/components/grid_esp32_usb/grid_esp32_usb.c
@@ -42,7 +42,6 @@ void tud_midi_rx_cb(uint8_t itf) {
   // regardless of these being used or not. Therefore incoming traffic should be
   // read (possibly just discarded) to avoid the sender blocking in IO
   uint8_t packet[4];
-  bool read = false;
 
   while (tud_midi_available()) {
 
diff --git a/grid_esp/components/grid_esp32_usb/grid_esp32_usb.h b/grid_esp/components/grid_esp32_usb/grid_esp32_usb.h
index aedae2471..36431e2d4 100644
--- a/grid_esp/components/grid_esp32_usb/grid_esp32_usb.h
+++ b/grid_esp/components/grid_esp32_usb/grid_esp32_usb.h
@@ -11,6 +11,7 @@
 extern "C" {
 #endif
 
+/*
 #undef CFG_TUD_CDC
 #undef CFG_TUD_HID
 #undef CFG_TUD_MIDI
@@ -22,6 +23,7 @@ extern "C" {
 #define CFG_TUD_MIDI 1
 #define CFG_TUD_MSC 0
 #define CFG_TUD_VENDOR 0
+*/
 
 /* HID Mouse Class Pointer Move Type */
 enum mouse_move_type { X_AXIS_MV = 0x01, Y_AXIS_MV = 0x02, SCROLL_MV = 0x03 };
diff --git a/grid_esp/main/grid_esp32.h b/grid_esp/main/grid_esp32.h
index 474fad8eb..c04d9b455 100644
--- a/grid_esp/main/grid_esp32.h
+++ b/grid_esp/main/grid_esp32.h
@@ -19,7 +19,7 @@
 #include "esp_random.h"
 
 #include "tinyusb.h"
-#include "tusb_cdc_acm.h"
+#include "tinyusb_cdc_acm.h"
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/semphr.h"
diff --git a/grid_esp/main/grid_fw.c b/grid_esp/main/grid_fw.c
index bb8e3d6ab..626684807 100644
--- a/grid_esp/main/grid_fw.c
+++ b/grid_esp/main/grid_fw.c
@@ -96,7 +96,7 @@
 static const char* TAG = "main";
 
 #include "tinyusb.h"
-#include "tusb_cdc_acm.h"
+#include "tinyusb_cdc_acm.h"
 
 static bool periodic_rtc_ms_cb() {
 
@@ -504,8 +504,6 @@ void app_main(void) {
 
   log_checkpoint("GUI INIT");
 
-  uint32_t hwcfg = grid_sys_get_hwcfg(&grid_sys_state);
-
   // Initialize font
   if (grid_hwcfg_module_is_vsnx(&grid_sys_state)) {
     grid_font_init(&grid_font_state);
diff --git a/vmp/vmp.c b/vmp/vmp.c
index 5f11e96d5..d3eba8c16 100644
--- a/vmp/vmp.c
+++ b/vmp/vmp.c
@@ -1,5 +1,8 @@
 #include "vmp.h"
 
+void* (*VMP_ALLOC)(size_t) = malloc;
+void (*VMP_DEALLOC)(void*) = free;
+
 uint32_t htonl(uint32_t hostlong) { return hostlong; }
 uint16_t htons(uint16_t hostshort) { return hostshort; }
 uint32_t ntohl(uint32_t netlong) { return netlong; }
diff --git a/vmp/vmp.h b/vmp/vmp.h
index c91902e01..6b9dfa5c7 100644
--- a/vmp/vmp.h
+++ b/vmp/vmp.h
@@ -6,8 +6,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-static void* (*VMP_ALLOC)(size_t) = malloc;
-static void (*VMP_DEALLOC)(void*) = free;
+extern void* (*VMP_ALLOC)(size_t);
+extern void (*VMP_DEALLOC)(void*);
 
 #define vmp_alloc(a) VMP_ALLOC(a)
 #define vmp_dealloc(a) VMP_DEALLOC(a)