Hello everyone I want to know if it is possible to communicate an Arduino "nano" with ESP8266-201 via the I2C bus, as there are not the same VDC. :confused: :confused: Also I do wonder it is mandatory to have the pull-up resistor on the SDA and SCL lines :( .
The device appears to be using serial as it's communication method. You will need to supply it with a 3v3 supply with enough current capacity to run it in max power TX. You will also need level conversion when connecting to the I/O pins. The data sheet will give you more details. There is also an ESP8266 forum where you can get further details.