I just try to put the 6N138 IC the other way around. Sometimes the software can detect the bootloader. How come? I thought I saw the notch of the IC is on the right side? However, not every tinme success. After MIOS sutdio 2 detect the bootloader, I was trying to upload the hex file. However, sometimes it has no response. Sometimes it was working, but the upload take about one hour to complete. After an hour time of uploading, it show the upload was complete. I press the query button, the software still only detect the bootloader only. It can't detect the application. Also Sammich did not reboot, the Sammich LCD screen is still blank. Anyone knows why?
Regards,
Sam