diff --git a/gen_release.py b/gen_release.py
index a759918..34587da 100644
--- a/gen_release.py
+++ b/gen_release.py
@@ -10,6 +10,8 @@ import subprocess
 import sys
 import platform
 import re
+import configparser
+from time import sleep as delay
 
 
 # Get the current directory
@@ -54,8 +56,35 @@ else:
                 # Add the environment to the list of environments
                 environments.append(environment)
 
+# Remove old platformio.ini file from firmware folder if it exists
+if os.path.isfile(os.path.join(firmware_folder, 'platformio.ini')):
+    os.remove(os.path.join(firmware_folder, 'platformio.ini'))
+
+# Copy the platformio.ini file to the firmware folder
+shutil.copyfile(os.path.join(current_dir, 'platformio.ini'), os.path.join(firmware_folder, 'platformio.ini'))
+
+# Check that the file is copied correctly
+if not os.path.isfile(os.path.join(firmware_folder, 'platformio.ini')):
+    raise Exception('platformio.ini file not copied correctly')
+
+# Read the platformio.ini file
+config = configparser.ConfigParser()
+config.read(os.path.join(firmware_folder, 'platformio.ini'))
+
+# Add firmware version to build_flags in platformio.ini
 for environment in environments:
-    subprocess.run([f'{platformio_path}/platformio.exe', 'run', '-e', environment,f'-DFW_VERSION={git_branch}_{environment}_{commit_hash}'], cwd=current_dir)
+    if 'build_flags' not in config[f'env:{environment}']:
+        config[f'env:{environment}']['build_flags'] = f'-DFW_VERSION=\\"{git_branch}_{environment}_{commit_hash}\\"'
+    else:
+        config[f'env:{environment}']['build_flags'] = config[f'env:{environment}']['build_flags'] + f' -DFW_VERSION=\\"{git_branch}_{environment}_{commit_hash}\\"'
+
+# if argument is not supplied, build all environments listed in platformio.ini
+if len(sys.argv) == 1:
+    subprocess.run([f'{platformio_path}/platformio.exe', 'run','-c',f'{firmware_folder}/platformio.ini'], cwd=current_dir)
+
+for environment in environments:
+    if(len(sys.argv) > 1):
+        subprocess.run([f'{platformio_path}/platformio.exe', 'run', '-e', environment,'-c',f'{firmware_folder}/platformio.ini'], cwd=current_dir)
     
     # Iterate over the subfolders in the firmware folder
     for subfolder in os.listdir(firmware_folder):
diff --git a/src/espmega_iot_core.cpp b/src/espmega_iot_core.cpp
index a20b559..845de70 100644
--- a/src/espmega_iot_core.cpp
+++ b/src/espmega_iot_core.cpp
@@ -395,6 +395,11 @@ void ota_begin()
     otabuffer+=ota_part2_1+"IP Address"+ota_part2_2+IP.toString()+ota_part2_3;
     otabuffer+=ota_part2_1+"MAC Address"+ota_part2_2+ETH.macAddress()+ota_part2_3;
     otabuffer+=ota_part2_1+"Device"+ota_part2_2+ESPMEGA_REV+ota_part2_3;
+    #ifdef FW_VERSION
+    otabuffer+=ota_part2_1+"Firmware"+ota_part2_2+FW_VERSION+ota_part2_3;
+    #else
+    otabuffer+=ota_part2_1+"Firmware"+ota_part2_2+"Out of Tree"+ota_part2_3;
+    #endif
     otabuffer+=ota_part2_1+"BMS Server"+ota_part2_2+MQTT_SERVER.toString()+ota_part2_3;
     otabuffer+=ota_part2_1+"BMS Endpoint"+ota_part2_2+String(MQTT_BASE_TOPIC)+ota_part2_3;
     otabuffer+=ota_part2_1+"Centrally Managed"+ota_part2_2;