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* Note that adding this pull-up resistor should **not** interefere with normal serial operation of the board, such as using the Serial Monitor or uploading sketches.
* *As an alternative*, instead of adding a pull-up resistor, you can simply exclude (or comment out) the `Serial.begin()` line in your sketch. This prevents the problem of HomeSpan hanging when you power it through the 5V pin, but it unfortunately means the Serial Monitor will not function when you connect the board to your computer, and you will need to add back `Serial.begin()` whenever you want to use the Serial Monitor.
#### *Compiler Error - `core_version.h` file not found*
* HomeSpan requires the file `core_version.h`. This file is part of each Arduino-ESP32 release package and is properly installed if you use the Arduino Board Manager. If you install the Arduino-ESP32 package manually by downloading the official release zip file (listed under the "Assets" section for each release), you will also find the `core_version.h` is included.
* If you receive the above error when you try to compile a HomeSpan sketch, that means the Arduino-ESP32 package was not properly installed. This can occur if instead of using one of the two methods above, you've tried to manually install the Arduino-ESP32 package by downloading a zip file created live from a specific branch of the Arduino-ESP32 code (typically via the `<> Code` button on GitHub when browsing a particular branch). The `core_version.h` file is usually not included in any of the branches, and thus will not be part of any zip files you request directly from a specific branch.
* **Resolution:** Use the Arduino Board manager to install the Arduino-ESP32 package (recommended), or install manually using an *official release zip* file found under the "Assets" section of each release version shown on the Arduino-ESP32 GitHub site.
* *As an alternative*, instead of adding a pull-up resistor, you can simply exclude (or comment out) the `Serial.begin()` line in your sketch. This prevents the problem of HomeSpan hanging when you power it through the 5V pin, but it unfortunately means the Serial Monitor will not function when you connect the board to your computer, and you will need to add back `Serial.begin()` whenever you want to use the Serial Monitor.
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