I had some difficulty setting up and using this old Funduino Pro Mini which is a chinese clone of the (no longer supported) Arduino Pro Mini. I made a text file which is below but a detailed pdf with images is on dropbox. Just refreshing my publishing skills actually and working out how to use the serial chips. About to work with ESP2866 and ESP32 next.
Here is the link to the images and pdf:
Here is the draft of the text it contains:
5/07/2022
PROGRAMMING A FUNDUINO PRO MINI
I am using an old (2017 purchase) "Funduino Pro Mini" board.
This has a chip "ATMEL 328P" visible on the photo.
The photo has the connections visible with the DTR cable connected.
Note that Pro-Mini has labels underneath but FTDI has them on top.
Note that the wires TXD and RXD are in the reversed order on the Funduino Pro Mini so you can use a ribbon cable and, when viewing from the top, they go straight across allowing for the gap from the unused CTS pin on the FTDI chip.
I am connecting it with an FTDI connector 1821C and the connections are as follows:
FTDI Labels Top View ------> Pro-Mini Labels Underside View (note the order shown is top view)
Green (GND) --------- Green(GND?)
Empty (CTS) Empty (GND)
Red (5V) --------- Red (VBUS? 5V)
Yellow (TXD) --------- Yellow (RX)
Blue (RXD) --------- Blue (TX)
Black (DTR) --------- Black (DTR)
The blink sketch loads normally with this setup.
The Arduino IDE lower RHS has message "Arduino Pro Mini, AT mega328P (5V, 16 MHz) on COM14"
IF YOU REMOVE DTR you cannot upload the sketch unless you do these steps:
Hold down reset button on the Funduino Pro Mini board
Click the upload button on the top left of Arduino IDE (the arrow points right)
Wait until "uploading" appears on the arduino IDE message area (green bar at middle).
Then release the button.
The screen looks like this:
GOOD UPLOAD SCREEN
If you don't do this step, in the correct order, the screen looks like this:
BAD UPLOAD SCREEN