Thanks in advance..
We are having esp8266-12E chip and Atmega328 connected as follows, ESP 12 pin as Tx,13 pin as Rx && Atmega328 13pin as Rx, 12pin as Tx. Everything works fine, but while communicating via serial some low pulse is being generated. We couldn't find the issue with multimeter anyway but got it by oscilloscope signal.
When this false low pulse during communication happens Atmega328 connected pins also getting low for the same duration.
We tried using separated logic execution for ESP and Atmega and both were worked perfectly, but only during communicating via Software serial its flickers getting started.
Please help us getting this resolved.