Have not used my kit for a while, trying to reacquaint myself

Projects Programming
1

I am trying to connect an FT232 to a Sparkfun Arduino Pro mini to program it I used a clone board on a slider rail project which died due to a short that I cannot find.
I want to program the Mini using the FT232 card and LATER! I want to do similar with the clone card.
My issue is this, I cannot find any clear instruction on how to connect the two together.
The FT232 is as follows.
CTS,RTS, RXD, TXD, GND,VCC
The Mini has these connections.
BLK, GND, VCC, RXI, TXO GRN

I understand TX to RX, RX to TX, GND to GND and VCC to VCC
What I have a problem with is CTS, RTS (FT232) and GRN, BLK on the Mini

Can anyone help/point me to any information?

2

Although this is for the 3.3V version, the principles are the same for a 5V version: Using the Arduino Pro Mini 3.3V - SparkFun Learn

And e.g.

conexao-ftdi-arduino-pro-mini-jpg
conexao-ftdi-arduino-pro-mini-jpg1024×597 86.8 KB

Source: How to connect an Arduino Pro Mini to a PC via a USB to Serial module | B4X Programming Forum

1 Like
3

Sorry, that is different to mine. I have an FT232
The FT232 is as follows.
CTS,RTS, RXD, TXD, GND,VCC
The Mini has these connections.
BLK, GND, VCC, RXI, TXO GRN

4

cts>>gnd
rts>>grn
rxd>>txo
txd>>rxi
gnd>>blk
vcc>>vcc

5

promini
promini737×1600 150 KB

6

Thanks for all the replies, I 'Think' I am sorted now. The issue was, I have an FT232 which I use with a Clone Mini, and A FTDI with genuine Pro Minis, That was a straight plug in / out, and the programming / loading worked. The FT232 and clone connections were a bit different, that is now working, I just need to keep them separate!

7

As an extra to this, does it cause a problem if you program a 3.3 board and the programmer is set to 5v? I have done this a few times, it does not seem to cause problems.
One more!- can you test a board to see if it is damaged? I have one that the led lights up on, but it won't take a sketch, I did not smell any burning!

8

  • This can cause a problem.

  • My FTDI boards are for 3.3v Arduinos but are compatible with 5v Arduino boards.

  • Some FTDIs have a 3.3v/5v jumper.

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9

MY FT232 has a 3.3v / 5v switch easy enough.
The FTDI Friend board has the jumper set to 5v
Can you say, what kind of problems?

10
  • If the ESP (3v3) input gets a 5v signal there is a potential of that input being damaged.
11

Or blow up the chip...
I blew up a pro mini by programming with 5v. Now it won't program, won't run code, and gets hot after seconds of being powered on.

12

Thanks, I was unsure as the extra 2.3v does not seem a lot, but, who knows (Not me!)
The problem I had was a mix of the FTDI friend which is a straight contact to contact connect with the Pro mini, and a n FT232 with a Mini clone, I struggle with DTR connection and what it equates to, I use the clones on cheap test projects and the Pros on the final item. I'll get there in the end!

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