Hi, Yes i'tried with a jumper on pin 2 and 7 on CN4 And with terminal program (Tera Term) with a null modem. Nothing change. no data on screen. The red led is always fast blinking at a rate of one per second. When i connect the usb connector to power the unit, the green led stay on for half a second then the red one start to blink.
Hi everybody ! I' Have an open tracker USB. It has been repaired one time. Today he was sending telemetry packet with some fuzzy characters. So i'decided to reflash firmware. Unfortunately the flashing process aborted. Now only the red led is blinking, and my pc do not detect it anymore. Tried with serial port to communicate but it was useless. Any help ? Thanks !