I want to connect an Esp8266 Wifi module to an Arduino nano. I am wondering if I need to implement level-shifting for the Arduino TX line to Esp RX line?

I find different schema's on the net. Some with, some without level-shifting:

With: http://community.blynk.cc/t/robot-with-esp8266-shield-and-arduino-nano/3316/8

Without: Arduino Nano v3.0 with ESP8266

Some use a capacitor between GND and Esp CH_PD pin, others use a 10K resister between the 3.3V and the CH_PD pin (https://blogs.msdn.microsoft.com/abhinaba/2016/01/23/esp8266-wifi-with-arduino-uno-and-nano/)...

What is the most basic but required setup for a Arduino Nano and a Esp8266? (I have Esp8266-12e modules)

Thanks!

I want to connect an Esp8266 Wifi module to an Arduino nano. I am wondering if I need to implement level-shifting for the Arduino TX line to Esp RX line?

I find different schema's on the net. Some with, some without level-shifting:

With: http://community.blynk.cc/t/robot-with-esp8266-shield-and-arduino-nano/3316/8

Without: Arduino Nano v3.0 with ESP8266

Some use a capacitor between GND and Esp CH_PD pin, others use a 10K resister between the 3.3V and the CH_PD pin (https://blogs.msdn.microsoft.com/abhinaba/2016/01/23/esp8266-wifi-with-arduino-uno-and-nano/)...

What is the most basic but required setup for a Arduino Nano and a Esp8266? (I have Esp8266-12e modules)

Thanks!