Hello my friends!
I need help making working arduino nano and MAX3232.
When i using MAX3232 with USB-TTL convertor everything working fine(see picture).
But when i want connect nano and MAX3232 nothing working. As i see nano itself can work as USB-TTL converter, but it is just dont work. I also tried software serial pins and again no luck. loopback test also not working. What seems to be the problem?
Nice pictures but they do not help. Post a simple schematic showing devices and pin numbers. This can be hand drawn if you want. Also post links to the working and not working parts. Posting the software may also help us help you. Be sure to follow the forum guidelines.
Looks like you are trying to use D0 and D1. Use SoftwareSerial and any pins other than 0 and 1.
Also - "+" looks like it's connected to Nano "VIN". That should go to "5V".
It's advised to keep the Nano in reset in this application.
The RX of the Nano board is the TX output of the TTL-to-USB converter on the Nano board, theTX of the Nano is the RX input of the TTL-to-USB converter. So RX of the Nano needs to be connected to TX of the MAX3232 (and TX of the Nano to RX of the MAX3232).
Why are you using "3V3" ?
MAX3232 need voltage supply 3-5V. As i tested 5V also works good, so it's not that important in my opinion.
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