diff --git a/firmware/src/cli.c b/firmware/src/cli.c
index e1c5ef2..3ba1ffc 100644
--- a/firmware/src/cli.c
+++ b/firmware/src/cli.c
@@ -7,6 +7,7 @@
 #include "pico/stdio.h"
 #include "pico/stdlib.h"
 #include "cli.h"
+#include "save.h"
 
 #define MAX_COMMANDS 32
 #define MAX_PARAMETERS 6
@@ -57,6 +58,7 @@ int cli_match_prefix(const char *str[], int num, const char *prefix)
 static void handle_help(int argc, char *argv[])
 {
     printf("%s", cli_logo);
+    printf("\tSN: %016llx\n\n", board_id_64());
     printf("Available commands:\n");
     for (int i = 0; i < num_commands; i++) {
         printf("%*s: %s\n", max_cmd_len + 2, commands[i], helps[i]);
diff --git a/firmware/src/save.c b/firmware/src/save.c
index d3b227e..3afec3c 100644
--- a/firmware/src/save.c
+++ b/firmware/src/save.c
@@ -19,6 +19,7 @@
 
 #include "hardware/flash.h"
 #include "pico/multicore.h"
+#include "pico/unique_id.h"
 
 static struct {
     size_t size;
@@ -109,6 +110,27 @@ static void save_loaded()
     }
 }
 
+static union __attribute__((packed)) {
+    pico_unique_board_id_t id;
+    struct {
+        uint32_t id32h;
+        uint32_t id32l;
+    };
+    uint64_t id64;
+} board_id;
+
+uint32_t board_id_32()
+{
+    pico_get_unique_board_id(&board_id.id);
+    return board_id.id32h ^ board_id.id32l;
+}
+
+uint64_t board_id_64()
+{
+    pico_get_unique_board_id(&board_id.id);
+    return board_id.id64;
+}
+
 void save_init(uint32_t magic, mutex_t *locker)
 {
     my_magic = magic;
diff --git a/firmware/src/save.h b/firmware/src/save.h
index 2cf5f1b..cde4229 100644
--- a/firmware/src/save.h
+++ b/firmware/src/save.h
@@ -12,6 +12,9 @@
 
 #include "pico/multicore.h"
 
+uint32_t board_id_32();
+uint64_t board_id_64();
+
 /* It's safer to lock other I/O ops during saving, so we need a locker */
 typedef void (*io_locker_func)(bool pause);
 void save_init(uint32_t magic, mutex_t *lock);