I am trying to use ESP8266(ESP01) by interfacing it with Arduino using USB power. I followed the given tutorial.
When I disconnect and reconnect ESP with Arduino it throws random symbols on the serial monitor and after doesn't responds to the AT commands. When I again disconnect and reconnect again some random symbols are thrown on the serial monitor.
I tried different baud rates but the result is same. I also noticed that at some baud rates it is not giving the random symbols. Also, my ESP doesn't have an updated firmware and I am using AMS1117 power module to step down 5V and using it as an input for ESP.
Any suggestions for this problem?