An error occurred while uploading the sketch
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x64
my arduino showing this error plz help us.
Hi @sunnysunveer I have moved your post to a dedicated topic.
I noticed the previous topic was about using a bootloader that allows loading sketch programs from an SD card. Do you have such a bootloader on your Arduino board?
Interesting that I am having exactly this problem. Using Arduino IDE 1.8.19 to try and install Arduino ISP on an Arduino UNO. The PC being used is a Kubuntu 20.04 linux computer.
Do I need to adjust the SPI clock speed for this? - No. That is in the sketch, not in the communications.
There are two red LEDS lit on the UNO. Should there be, or have I bricked it?
Thanks for any response
I've seen a lot of discussions on this topic over various websites. I came across it also using an UNO-R3. Tried all of the suggestions I came across, short of reloading bootloader. Per chance I found my problem, in case anyone else has similar issues:
1- Board was recognized by PC.
2- IDE identified the board properly
3- The sketch verified ok
I had another board attached to the UNO via the serial lines (Tx & Rx, Digital 0 & 1). As soon as I disconnected these, the upload proceeded fine. I don't know what the source of the interference was, but before you go messing with the bootloader, isolate the board from all connections, especially the serial ones.
The answer as to why the interference was created, I leave to smarter individuals.
Well Denesius, this is the sort of problkem that I was having, using a UNO as a bootloading device to program an ANET 3D printer board. It can't program it unless it is connected, and if connected, gets the not sync'ing messages.