Added/Improved clear step-by-step instructions for Sidekick Model 1

docs/model1/arduino-set-up/flash-arduino.md

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+# Flash Arduino with SCPI Firmware
+
+This tutorial will guide you through flashing your Arduino with SCPI (Standard Commands for Programmable Instruments) firmware, enabling it to communicate with your EPICS IOC through standardized serial commands.
+
+## Prerequisites
+
+- Completed [Create and Run a Simple EPICS IOC](../create-simple-ioc.md)
+- Arduino device (Uno, Nano, or compatible)
+- USB cable for Arduino connection
+- Computer with Arduino IDE capability
+
+## Required Downloads
+
+First, we need to ensure that our Arduino's are flashed with the correct Arduino files and you must have the Arduino IDE downloaded.
+
+### 1. Arduino SCPI Firmware
+Download the Arduino SCPI firmware files from the GitHub repository:
+- **Repository**: [Link to GitHub repository here]
+- **File needed**: `.ino` file containing the SCPI implementation
+- Save this file to a known location on your computer
+
+### 2. Arduino IDE
+Download and install the Arduino IDE:
+- **Official Download**: [Link to Arduino IDE here]
+- Choose the version appropriate for your operating system
+- Install following the standard installation process
+
+## Step 1: Setup Arduino IDE and Open Firmware
+
+Once those two are downloaded:
+
+1. **Open Arduino IDE**: Launch the Arduino IDE application
+2. **Open SCPI Firmware**: 
+   - Open the `.ino` file that you downloaded from the GitHub repository
+   - Go to `File` → `Open`
+   - Navigate to and select the downloaded `.ino` file
+   - The SCPI firmware code should now be displayed in the IDE
+
+## Step 2: Configure Arduino Connection
+
+Once you've done that:
+
+1. **Connect Arduino**: Plug in your Arduino to your computer using a USB cable
+2. **Select Arduino in IDE**: 
+   - Go to `Tools` → `Board` → `Arduino AVR Boards`
+   - Select the type of Arduino it is (e.g., "Arduino Uno", "Arduino Nano")
+3. **Select Port**:
+   - Go to `Tools` → `Port`
+   - Select the port showing your Arduino (typically shows as "Arduino Uno" or similar)
+
+## Step 3: Handle Missing Libraries
+
+Once you've done that you can begin to upload the `.ino` file to the Arduino. Please keep in note you may run into a few errors regarding libraries missing. To fix this:
+
+### Method 1: Library Manager (Recommended)
+1. Go to `Tools` → `Manage Libraries...`
+2. In the Library Manager search box, search for the missing library name
+3. Click "Install" on the appropriate library
+4. Repeat for any additional missing libraries
+
+### Method 2: Manual Installation
+If libraries aren't available through the Library Manager:
+1. Download the required library as a ZIP file
+2. Go to `Sketch` → `Include Library` → `Add .ZIP Library...`
+3. Select the downloaded ZIP file
+4. Restart the Arduino IDE
+
+### Common Required Libraries
+The SCPI firmware typically requires:
+- **Vrekrer_scpi_parser**: For SCPI command parsing
+- **SoftwareSerial**: Usually included with Arduino IDE
+- Additional libraries specific to your hardware setup
+
+## Step 4: Compile and Upload Firmware
+
+1. **Verify Code**: Click the checkmark icon (✓) to compile and check for errors
+2. **Resolve Any Issues**: 
+   - If compilation errors occur, install missing libraries as described above
+   - Check that board and port selections are correct
+3. **Upload Firmware**: Click the arrow icon (→) to upload the firmware to your Arduino
+4. **Monitor Upload**: Watch the status bar for upload progress and completion
+
+## Step 5: Verify Successful Flash
+
+### Check Upload Confirmation
+- Look for "Done uploading" message in the IDE status area
+- The Arduino's built-in LED may blink during upload
+
+### Test Serial Communication
+1. **Open Serial Monitor**: 
+   - Go to `Tools` → `Serial Monitor`
+   - Set baud rate to match your firmware (typically 9600 or 115200)
+2. **Test SCPI Commands**:
+   - Type `*IDN?` and press Enter
+   - You should receive an identification response from the Arduino
+   - Try other basic SCPI commands as defined in your firmware
+
+## Troubleshooting
+
+### Upload Fails
+- **Port Issues**: Ensure correct port is selected and Arduino is properly connected
+- **Driver Problems**: Install Arduino drivers if port doesn't appear
+- **Board Selection**: Verify correct Arduino model is selected
+
+### Compilation Errors
+- **Missing Libraries**: Install all required libraries through Library Manager
+- **Version Conflicts**: Ensure library versions are compatible
+- **Code Issues**: Verify you have the correct `.ino` file version
+
+### No Serial Response
+- **Baud Rate**: Check serial monitor baud rate matches firmware setting
+- **Connection**: Verify USB cable provides data connection, not just power
+- **Firmware Issues**: Try re-uploading the firmware
+
+## Success Confirmation
+
+Your Arduino is successfully flashed when:
+- Upload completes without errors
+- Serial monitor shows response to `*IDN?` command
+- Arduino responds to basic SCPI commands
+- No error messages in serial communication
+
+## Next Steps
+
+With your Arduino now running SCPI firmware, you're ready to configure serial communication:
+
+**Next tutorial:** [Configure Serial Port Communication](../arduino-set-up/serial-port-communication.md) - Set up serial communication between your Raspberry Pi and Arduino
+
+This will enable your EPICS IOC to send commands to and receive data from your Arduino device through standardized SCPI protocols.