Hi there,
I'm trying to upload a sketch to an Arduino Nano but instead of going through the built in USB->Serial Adapter I want to use an external adapter (e.g. this one: Geekcreit® FT232RL FTDI USB To TTL Serial Converter Adapter Module Geekcreit for Arduino - products that work with official Arduino boards Sale - Banggood USA).
However - I'm having troubles figuring out the correct wiring (or if that's even possible). TX-TX, RX-RX, 5V-Vin, Gnd-Gnd does seem to work. The IDE is detecting the serial adapter but fails to upload to the nano with:
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt x of 10: not in sync: resp=0x00
Any ideas?
Thanks & Greetings, Nico
You have to have crossed Rx and Tx and DTR from the converter to RESET on the Arduino.
Hmm. Still not working. The flashing led from the init program on the nano turns off now during upload (probably because reset is triggered) and but then nothing.
I've tried
RX->TX (Arduino Pin 0)
TX->RX (Arduino Pin 1)
and vice versa but neither seems to work. Any other suggestions what I might be doing wrong?
Thanks & Greetings, Nico
Hmm...
When the upload starts it resets the Arduino first. It should be be visible on L LED. Blink of Rx LED should be visible immediately after. It is upload attempt.
Try the loopback test if the converter works as expected. Rx to Tx and terminal APP returns what is written.
Hmm. Thanks again. LED on nano signals the reset when upload starts. RX is not flashing when the upload starts. When I connect TX-TX and RX-RX I see TX flashing on the Nano. When I cross the cables there's no flashing.
I've tried with several Nano boars so that seems not to be the issue. Just to make sure - AVRISP mk 2 as programmer and connection from Convert to Nano Pins as RX/TX/VCC/DST/GND -> 0(TX)/1(RX)/5V/RST/GND is correct - right?
Thanks & Greetings, Nico
DST? DTR
Did you try the loopback test with the USB/serial converter to be sure it is working properly?