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MSP432E401Y: two microcontrollers communicating via UART

Part Number: MSP432E401Y


Hello,

I'm currently working on a project in which I need to communicate with 2 MSP432s via UART. My code is working because I have tested each of the microcontrollers using my PC. When I connect them together they don't communicate. I have one of the RX pin in one microcontroller connected to the TX of another and the TX of another connected to the RX of the other. I also have their GND pins connected. I'm using pin 6 and 7 in each. Is there something I'm doing wrong? 

I have gone through the code examples in resource explorer but there are only UART examples communicating with the computer, not with another microcontroller. Please help!