SparkFun Forums

[knuckles]

i have a USB to uart loader with the same chip (silabs 2102)as the sparkfun breakout but its not the ftdi version but from off ebay .
i keep getting a non snyc error message when trying to load a sketch (a check shows it to be a common error )

error is avrdude: stk500_getsync(): not in sync: resp=0x00

is this because the pro mini is tricky to load a sketch to ?
i cant find much on the pro mini feedbacks

[Joeisi]

Could we have a picture or something of the USB to UART module and a hook up so we can see how you have it set up?

[knuckles]

wiring as follows

3.3v on usb device to Vcc on pro mini
Rx to RX
Tx to TX
grd to grd
and RST to RST
tried a selection of ports as well
and pressing the reset before and during upload of sketch for x seconds
pro mini board was chosen in the IDE

[Joeisi]

Flip RX and TX.
TX ->RX
RX <- TX

[knuckles]

i tried that and no dice ,the seller recommends the way i quoted to do rx and tx

as the wiring here shown

http://www.ebay.co.uk/itm/1x-USB-2-0-TO ... 4096wt_967

[knuckles]

heres a youtube vid that shows an ideal hookup
http://www.youtube.com/watch?v=X5NhuPuNI7A

[knuckles]

i bought a basic FTDI breakout board and loaded on the drivers and hooked it up to the pro mini and i am still getting the same error message as before

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

tried changing the baud rate but still cant load a sketch .
its a mystery

[Joeisi]

Have you contacted Sparkfun about this?

[knuckles]

yes they are very helpfull but no solution yet .
i think its got to be the cts and dtr pins ,going to nowhere usefull .
where do these pins have to go on a uno board, i will try that next .
3v and ground is fine,
rx to tx ,or tx to tx and rx to rx ?
cts and dtr connections go to where ?
power is getting thru but theres a sync problem somewhere (red led are on )
thanks