I recently created a board based on the zigduino and picopter circuit designs using the Atmega128RFA1-ZU chip and uploaded the zigduino bootloader. What I see is the LED on pin 13 blinks 4 times in a row with a 2 seconds break in between. Is that the normal behaviour of the zigduino bootloader? However, I am unable to upload sketches to the chip. When I try to upload the TX pin blinks 3 time and then times out with the following messages and the usual bootloader blinking continues after the timeout:
avrdude: stk500_getsync(): not in sync: resp=0x00
I am using the following fuse settings: hfuse: D8 lfuse: F7
Any idea what could be the problem? What is the correct fuse settings for zigduino? I checked the fuse settings on the board config but was not sure if that is correct.