[SOLVED] Custom Arduino Board Failed To Upload Sketch

[lockman_akim]

Hi All,

I have one original Arduino Uno which the FTDI chip was not work. so i decided to make my own custom arduino. Basically at my custom uno, there is no FTDI chip, i just pull the TX and RX to some header pin connector so i will plug my ftdi USB to UART converter to that particular header pin. i pull out Atmega328 from original uno and put it to my custom uno. i believe the uC is still work since i can upload sketch into that uC using other original Uno. But when i plug USB to UART converter to my custom uno board and try to upload sketch using Arduino IDE i have an error

stk500_getsync(): not in sync: resp=0x00

i have done a lot of troubleshooting like swaping TX and RX connection, try with other Atmega328 (with uno bootlooder). but still not work. what i do wrong?

 

[milan.rajik]

It's because you have selected wrong COMx port. Select proper COM port and it will upload the sketch.

 

[KlausST]

Hi,

and you have to select the proper baud rate....


Klaus

 

[lockman_akim]

It's because you have selected wrong COMx port. Select proper COM port and it will upload the sketch.

it only one com port in my pc which is COM7 and i have check it in Device manager, it belong to my FTDI usb to uart conveter.

- - - Updated - - -

Hi,

and you have to select the proper baud rate....


Klaus

what is the proper baud rate? and how to set the baud rate for uploading sketch? as i know, baud rate can only change when we try to do serial com in serial monitor.

 

[KlausST]

Hi,

what is the proper baud rate? and how to set the baud rate for uploading sketch? as i know, baud rate can only change when we try to do serial com in serial monitor.

I don´t know the proper baud rate.

But you talk of UART - it needs a baud rate. (most probably it´s set with ATMEGA firmware)
You talk of COM7 - is also needs a baud rate. (it can be set inwindows device manager)

and both must match.


Klaus

 

[lockman_akim]

Finally i found what is the problem. to upload the sketch, not only TX and RX pin is used, but DTR pin should be also connect to the RESET pin.

DTR >-------- | | --------- >RESET PIN
0.1 uf

now my problem is solved.