Tried to load grbl https://github.com/chamnit/grbl/downloads it's flashing original chip by Xloader, but all I can see is
"Grbl 0.8a '$' to dump current settings"
I have no responce to any '$' commands :(... I've tried many grbl firmwires. Results are the same. is it possible that I have problem because of ATMEGA 16U or NXP OPAMP?
my board is http://www.ebay.com/itm/EKitsZone-UNO-R3-ATMEGA-328-ATMEGA-16U-Fully-Compatible-with-Arduino-UNO-R3-/230749072250?pt=BI_Electrical_Equipment_Tools&hash=item35b9b76b7a#ht_1144wt_1185 "The EKitsZone UNO is 100% compatible with Arduino Uno R3 with some enhancement. It replaced the LM358D with a fast response NXP OPAMP. The new OPAMP is 10 times faster than LM358D in term of dv/dt. The UNO is using the Atmega16U2 as a USB-to-serial converter."