B4R Question How to connect ESP8266 to arduino

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cloner7801

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Erel said:
What do you want to connect them for? Which Arduino board?

You can use SoftwareSerial to connect two boards. However the ESP8266 is a 3.3v and most Arduinos are 5v. So you will need to use a level shifter.
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I want to connect ESP8266 to Arduino UNO as a ethernet shield
Arduino UNO has 3.3v pin
 
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derez

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cloner7801 said:
But how can I use this as ethernet shield and send udp pocket to arduino for controll the relay
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The idea is to use the ESP instead of the Arduino. The ESP can control the relay by itself. If you want to connect ESP and Arduino you can do it by wires, using SoftwareSerial.
If the devices are separated and you need network - there are several examples how to connect two devices, like in this https://www.b4x.com/android/forum/threads/esp8266-wifi-remote-configuration.68596/
 
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