Hi there,
Does anyone know how to upload a new bootloader into MKR GSM 1400?
Looking at https://www.arduino.cc/en/tutorial/arduinoISP it states that MKR family could be used as a ISP programmer, but it says nothing about an MKR being the target.
Do I need an external programmer (e.g. Pickit 4) connected via JTAG to load the bootloader?
Thanks in advance.
Edit:
There is this sentence at the SAMD21 datasheet.
"The Flash program memory can be reprogrammed in-system through the SWD interface. The same interface can be used for non-intrusive on-chip debug of application code. A boot loader running in the device can use any communication interface to download and upgrade the application program in the Flash memory."
The question is still up thoug. Using an external programmer is the only way to burn a new bootloader?