Cannot exchange data between nodemcu and arduino mega
Posted: Fri Feb 24, 2017 8:05 pmHello, I'm trying to exchange data via UART between an arduino mega and a nodemcu (programming both using arduino IDE).
I lowered the voltage from the arduino to 3V3 and I'm able to receive data in arduino mega from nodemcu. The problem is that I can't receive data in nodemcu.
When they are disconnected I can clearly see the arduino mega sending my data, but as soon as I connect to my RX pin in nodemcu, the signal gets pulled down to 0V and there is no more data going through.
Does anyone have any idea as to why this happens?
I tried using Seria.swap and I can still see the signal clearly going from nodemcu to arduino mega but the same problem happens with the Rx pin.
I lowered the voltage from the arduino to 3V3 and I'm able to receive data in arduino mega from nodemcu. The problem is that I can't receive data in nodemcu.
When they are disconnected I can clearly see the arduino mega sending my data, but as soon as I connect to my RX pin in nodemcu, the signal gets pulled down to 0V and there is no more data going through.
Does anyone have any idea as to why this happens?
I tried using Seria.swap and I can still see the signal clearly going from nodemcu to arduino mega but the same problem happens with the Rx pin.