Getting Null Exception

[gregg-veemac]

Hi

Hoping someone here can help me. I have the following code but when I try to upload the sketch, I get a null exception. I've verified the file name is correct and the port is correct. The board I'm using is a Nano 33 BLE, and I've tried various ArduinoModels but I get the same results with each one.

This is the code:

NLogArduinoUploaderLogger log = new NLogArduinoUploaderLogger();
Progress progress = new Progress(p => log.Info($"Upload progress: {p}%"));

var uploader = new ArduinoSketchUploader(
new ArduinoSketchUploaderOptions()
{
FileName = @"C:\Testing\Nano_33_BLE_sketch_20250612114853.ino.hex",
PortName = "COM4",
ArduinoModel = ArduinoModel.NanoR3
}, log, progress);

uploader.UploadSketch();

Here are the exception details:

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=ArduinoUploader
StackTrace:
at ArduinoUploader.BootloaderProgrammers.ResetBehavior.ResetThroughTogglingDtrRtsBehavior.Reset(SerialPortStream serialPort, SerialPortConfig config)
at ArduinoUploader.BootloaderProgrammers.ArduinoBootloaderProgrammer.Close()
at ArduinoUploader.ArduinoSketchUploader.UploadSketch(IEnumerable`1 hexFileContents)
at ArduinoUploader.ArduinoSketchUploader.UploadSketch()
at PeskyMVC.winULVController.UploadNewSketch(String filename, String port) in C:\Users\gregg\source\repos\gregg-veemac\PeskyMVC\winULVController.xaml.cs:line 63

This exception was originally thrown at this call stack:
[External Code]
PeskyMVC.winULVController.UploadNewSketch(string, string) in winULVController.xaml.cs

Thank you and I appreciate the help!