Fix missing encoding from bytearray use

.github/workflows/build.yml

@@ -22,10 +22,11 @@ jobs:
         awk -F '\/' '{ print tolower($2) }' |
         tr '_' '-'
         )
-    - name: Set up Python 3.x
+    - name: Set up Python 3.11
+      # Hard code to 3.11 to fix setuptools bug in 3.12
       uses: actions/setup-python@v2
       with:
-        python-version: "3.x"
+        python-version: "3.11"
     - name: Versions
       run: |
         python3 --version

.readthedocs.yaml

@@ -9,7 +9,7 @@
 version: 2
 
 build:
-  os: ubuntu-20.04
+  os: ubuntu-latest
   tools:
     python: "3"
 

mindwidgets_df1201s.py

@@ -105,7 +105,7 @@ def _send_query(self, command: str, arg=None) -> str:
         print("DFPlayer Command: ", at_command)
 
         # send the AT command
-        self._uart.write(bytearray(f"{at_command}\r\n"))
+        self._uart.write(bytearray(f"{at_command}\r\n", "ascii"))
 
         # read the response and strip the \r\n
         response = self._uart.readline()