This is very interesting conversation. But why don’t think directly communicate between two microcontrollers by their own ports.Hi,
i have some doubts here want to ask,
May i know there is a need to use rs232 or max232 circuit for communication between 2 microcontroller?
As i know, RS232 logic is just use in PC. So, if both microcontrollers also using TTL logic, why we still need to use max232 for rs232 conversion?
i am little bit confusing about this.
Thanks.
regards,
sysysy
For communication between two microcontrollers (without PC) you dont need Max232. You can simply use Tx and Rx pins of the two microcontrollers
you should explain what you mean to say.... if tx and rx is required then how come without MAX232.... what method are you talking?
if you dont want tx rx pin then you can use any other port pin... bit banging???? then check it properly
if tx and rx is required then how come without MAX232
logic '1' - 5V
logic '0' - 0V
logic '1' - -12V
logic '0' - +12V
Dear sysysy
If you want your MCU to communicate with PC then you need max 232 between them. But if you want only MCUs to communicate with each other(and not with PC) then you dont require max 232
not only pc, it can be any devices which have / requires UART needs MAX 232...
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