diff --git a/.gitignore b/.gitignore
index 737bd477..cfe62182 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,3 +22,4 @@ Grbl_Esp32.vcxproj.filters
 Grbl_Esp32.ino.cpp
 packages/
 pio_machine.h
+project.checksum
diff --git a/Firmware/test-2.1a-20210326/firmware.bin b/Firmware/test-2.1a-20210326/firmware.bin
new file mode 100644
index 00000000..3ece8ff8
Binary files /dev/null and b/Firmware/test-2.1a-20210326/firmware.bin differ
diff --git a/Firmware/test-2.1a-20210326/firmware.elf b/Firmware/test-2.1a-20210326/firmware.elf
new file mode 100644
index 00000000..73b60aa8
Binary files /dev/null and b/Firmware/test-2.1a-20210326/firmware.elf differ
diff --git a/Grbl_Esp32/src/Grbl.h b/Grbl_Esp32/src/Grbl.h
index 0fb36622..9ef5069b 100644
--- a/Grbl_Esp32/src/Grbl.h
+++ b/Grbl_Esp32/src/Grbl.h
@@ -22,8 +22,8 @@
 
 // Grbl versioning system
 
-const char* const GRBL_VERSION       = "1.3a";
-const char* const GRBL_VERSION_BUILD = "20201101";
+const char* const GRBL_VERSION       = "2.1a";
+const char* const GRBL_VERSION_BUILD = "20210326";
 
 //#include <sdkconfig.h>
 #include <Arduino.h>
diff --git a/platformio.ini b/platformio.ini
index 5721bcb8..cc2807df 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -5,6 +5,7 @@ test_dir=Grbl_Esp32/test
 data_dir=Grbl_Esp32/data
 default_envs=release
 ;extra_configs=debug.ini
+build_dir = Firmware
 
 [common_env_data]
 lib_deps_builtin =