Lilygo T-Impulse Not Uploading Sketch

[BrianUsher]

Hello Lilygo People!

I just bought a Lilygo T-Impulse and I have issues uploading the sketch via the Arduino IDE. I can serial monitor the T-Impulse and the USB port looks ok in Device Manager. The USB port appears under Ports (Com and LPT) as NUCLEO_L073RZ CDC in FS Mode (COM4). All looks ok. In the Arduino IDE I have selected the following:

Board: "Nucleo-64"
Port: "COM4"
Optimize: "Smallest (-Os default)"
Board part number: "Nucleo L073RZ"
C Runtime Library "Newlib Nano Default"
Upload method: "Mass Storage"
USB support (if available): "CDC (generic 'Serial' supersede U(S)ART)"
U(S)ART supports: "Enabled (generic 'Serial')"
USB speed (if available): "Low/Full Speed"

My operating system is Windows 10 Home.

I have not been able to upload at all. I can see data streaming nicely via the Serial Monitor so I think I'm very close to getting it to upload. At least the USB driver appears to be working. I've tried several methods for getting the device into upload mode being:

1. USB cable plugged in, pressure and hold the Boot button then press and release the Reset button, then release the Boot button.

2. Press and hold the Boot button whilst device is not plugged into the USB port, then plug the device into the USB whilst still holding the Boot button and then click the compile/upload the sketch in IDE.

Neither of these methods results in upload occurring. In fact the COM 4 port disconnects unless the Reset button is pressed again. The program compiles nicely then I get the error:

"NODE_L073RZ not found. Please ensure the device is correctly connected"
"Failed uploading: uploading error: exist status 7"

Perhaps the bootloader is not working but the USB is?? I have removed and reloaded the STM32BOOTLOADER and run Zadig (which is where I picked up the 'NUCLEO_L073RZ CDC in FS Mode' driver). I feel I am getting close. Any help would be most appreciated.

Regards,

Brian