Sparkfun Edge UART

Development Boards
1

Hi,

I am trying to connect my Sparkfun edge to communicate with a third party board(similar to Arduino). I connected TXO pin of Sparkfun to RX of receiver and RXI of Sparkfun to TX of the receiver and connected the ground and 3.3V pin of the receiver.

But the receiver couldn’t receive the data from the Sparkfun. But if I connect the Sparkfun to the laptop using Sparkfun Serial basic I can see all the messages.

Can you please let me know if there is an issue with the connection?? Do we have to compulsorily connect CTS and DTR??

2

Hi reachkvenkat94,

If you are just sending serial data out the serial port on the Edge, you do not need DTR/CTS connected. Most likely, the issue is either a mismatched baud rate or the device you are connecting to the Edge is running at a different logic level. Make sure the second device either runs at 3.3V logic or you have a level shifting circuit in between the two boards.