Hello,
I have an arduino Mega2560 Pro. (https://robu.in/wp-content/uploads/2020/02/IMG_8271.jpg)
Micro usb port on it is broken.
Is it possible to wire an external micro usb board to any of the available pins (the pads where original port was too small for me to solder).
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You can solder it the last board to the serial-to-usb adapter (the 16 pin IC) on your board. I can't read the print; read the print and find the datasheet to figure out which pins.
Alternatively buy a serial-to-usb adapter (with the DTR pin available; e.g. SparkFun FTDI Starter Kit - 5V - KIT-18290 - SparkFun Electronics) and wire that to your Mega2560 Pro; you can use dupont wires to connect GND, 5V, Tx, Rx; DTR will go to the reset pin. How to connect an Arduino Pro Mini to a PC via a USB to Serial module | B4X Programming Forum shows a wiring example.
Sorry, I am noob here.
I also have a USB to TTL adatpter, which got 5v, GND, TX and RX pins. Can that be used to program the Arduino ?
The USB chip is a CH340G (it tells you on the back of the board).
There is a schematic here Arduino Mega 2560 Pro Mini Board with CH340 - 99Tech . Only 4 pins have to be connected between the USB micro socket and the board. The pin marked ID is not used. D+ and D- each appear to be wired through a 22 ohm resistor before landing on the CH340G chip.
You should open another topic and say what hardware/board/chip you are attempting to program and say what USB to TTL adaptor you have purchased.
You need the reset; unless you want to tap the reset button on the Mega2560 Pro at exactly the right moment.
I think that that would be considered cross-posting.
Oops. I, for some reason, I thought that that comment was from another poster. Of course, it is the same OP.
@sim_tcr ignore what I said.
Thank you, This solved my issue.
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