diff --git a/HISTORY.md b/HISTORY.md
index 04e5025..2a71d8c 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,10 @@
 # History
 
+## 0.5.0 (2024-11-10)
+
+* Provide control over the startup and demo commands.
+* Ensure that potentially undefined variable is defined.
+
 ## 0.4.0 (2024-04-05)
 
 * Provide functions to fetch local and remote firmware versions.
diff --git a/teensytoany/teensytoany.py b/teensytoany/teensytoany.py
index ee0dd61..db59326 100644
--- a/teensytoany/teensytoany.py
+++ b/teensytoany/teensytoany.py
@@ -136,6 +136,7 @@ def list_all_serial_numbers(serial_numbers=None, *, device_name=None):
     def get_latest_available_firmware_version(
         *, mcu='TEENSY40', online=True, local=True, timeout=2
     ):
+        latest = None
         if local:
             local_versions = TeensyToAny._find_local_versions(mcu=mcu)
             if len(local_versions) > 0:
@@ -813,3 +814,80 @@ def analog_read(self, pin: int):
         """
         returned = self._ask(f"analog_read {pin}")
         return int(returned, base=0)
+
+    def eeprom_read_uint8(self, index: int) -> int:
+        """Read an 8-bit unsigned integer from the EEPROM.
+
+        Parameters
+        ----------
+        index: int
+            The index in the EEPROM to read the uint8 value.
+
+        Returns
+        -------
+        int
+            The 8-bit unsigned integer read from the EEPROM.
+
+        Raises
+        ------
+        ValueError
+            If the index is out of bounds.
+        """
+        cmd = f"eeprom_read_uint8 {index}"
+        returned = self._ask(cmd)
+        return int(returned, base=0)
+
+    def eeprom_write_uint8(self, index: int, data: int):
+        """Write an 8-bit unsigned integer to the EEPROM.
+
+        Parameters
+        ----------
+        index: int
+            The index in the EEPROM to write the uint8 value.
+        data: int
+            The 8-bit unsigned integer to write to the EEPROM.
+
+        Returns
+        -------
+        None
+
+        Raises
+        ------
+        ValueError
+            If the index is out of bounds or the data is too long to fit in the EEPROM.
+        """
+        cmd = f"eeprom_write_uint8 {index} {data}"
+        self._ask(cmd)
+
+    def startup_commands_available(self):
+        """Return the number of startup commands available."""
+        returned = self._ask("startup_commands_available")
+        return int(returned, base=0)
+
+    def read_startup_command(self, index):
+        """Read the startup command at the specified index."""
+        returned = self._ask(f"read_startup_command {index}")
+        return returned
+
+    def demo_commands_available(self):
+        """Return the number of demo commands available."""
+        returned = self._ask("demo_commands_available")
+        return int(returned, base=0)
+
+    def read_demo_command(self, index):
+        """Read the demo command at the specified index."""
+        returned = self._ask(f"read_demo_command {index}")
+        return returned
+
+    def demo_commands_enabled(self):
+        """Return whether the demo commands are enabled on startup."""
+        returned = self._ask("demo_commands_enabled")
+        return bool(int(returned, base=0))
+
+    def enable_demo_commands(self):
+        """Enable the demo commands on startup."""
+        self._ask("enable_demo_commands")
+
+    def disable_demo_commands(self):
+        """Disable the demo commands on startup."""
+        self._ask("disable_demo_commands")