diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 0000000..86cefd7
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,79 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master, develop ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, develop ]
+  schedule:
+    - cron: '16 17 * * 2'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-18.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://git.io/codeql-language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        config-file: ./.github/workflows/codeql/codeql-config.yml
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+#    - name: Autobuild
+#      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    - if: matrix.language == 'cpp' || matrix.language == 'c'
+      name: Build
+      run: |
+        ls
+        sudo apt update
+        sudo apt install -y gcc git wget make libncurses-dev flex bison python python-setuptools python-serial ninja-build
+        wget https://dl.espressif.com/dl/xtensa-lx106-elf-linux64-1.22.0-100-ge567ec7-5.2.0.tar.gz
+        tar -xzf ./xtensa-lx106-elf-linux64-1.22.0-100-ge567ec7-5.2.0.tar.gz
+        python -m pip install --user -r ./ESP8266_RTOS_SDK/requirements.txt
+        export IDF_PATH=$PWD/ESP8266_RTOS_SDK
+        export PATH="$PATH:$PWD/xtensa-lx106-elf/bin"
+        python ./idf.py fullclean
+        python ./idf.py build
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
diff --git a/.github/workflows/codeql/codeql-config.yml b/.github/workflows/codeql/codeql-config.yml
new file mode 100644
index 0000000..127b5e6
--- /dev/null
+++ b/.github/workflows/codeql/codeql-config.yml
@@ -0,0 +1,6 @@
+name: "My CodeQL config"
+
+languages: cpp
+
+paths-ignore:
+  - ESP8266_RTOS_SDK
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c679ee9..9711991 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,9 +6,11 @@ on:
       - '**.md'
       - 'circuit'
 
+
 # env:
 #   UPLOAD_USER_FIRMWARE: false
 
+
 jobs:
   build:
     runs-on: ubuntu-18.04
diff --git a/README.md b/README.md
index cc6a149..b716ae0 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+test
 <p align="center"><img src="https://user-images.githubusercontent.com/17078589/120061980-49274280-c092-11eb-9916-4965f6c48388.png"/></p>
 
 ![image](https://user-images.githubusercontent.com/17078589/107857220-05ecef00-6e68-11eb-9fa0-506b32052dba.png)
@@ -356,4 +357,5 @@ Credits to the following project, people and organizations:
 
 ## License
 
-[MIT LICENSE](LICENSE)
\ No newline at end of file
+[MIT LICENSE](LICENSE)
+
diff --git a/main/main.c b/main/main.c
index a6acd68..1707226 100644
--- a/main/main.c
+++ b/main/main.c
@@ -102,6 +102,7 @@ void app_main() {
     mdns_setup();
 #endif
 
+
 #if (USE_OTA == 1)
     co_handle_t handle;
     co_config_t config = {