diff --git a/src/rs485.c b/src/rs485.c
index dd0a815..2eb3d99 100644
--- a/src/rs485.c
+++ b/src/rs485.c
@@ -93,7 +93,7 @@ void process_command(uint8_t *cmd, size_t length) {
             } else if (strcmp(combined_str, "M2") == 0) {
                 g_statusSwitch = false;
             } else if (strcmp(combined_str, "M3") == 0) {
-                printf("%c%c%c%c%c%c", 0xB5, 0xF1, 0x02, 0x6F, 0x6B, 0xCC);
+                printf("%c%c%c%c%c%c", 0xB5, 0xF0, 0x02, 0x6F, 0x6B, 0xCC);
                 fwdgt_reset_mcu();
             } else {
                 printf("%c%c%c%c%c%c%c", 0xB5, 0xF0, 0x03, 0x65, 0x72, 0x72, 0x3C);