ESP8266 I2C with arduino nano

Hardware
#1

Hello,

I have a Heltec wifi kit 8 with a ESP8266 in it. I also hava an arduino nano. I want to use I2C for a communication between them. The ESP8266 would be the slave who writes and receives something from the arduino nano as master. The ESP8266 works with 3.3 V and the nano with 5 V. Do i need to use a voltage regulator or voltage devider or something else or can i just connect SDA en SCL to both boards?

Thanks!

#2

I2C slave doesn't work on esp8266

#3

So the esp8266 has to be the master?

#4

even better, don't use I2C. I2C on esp8266 arduino is bitbanged (emulated by software)