Wireless serial connection between raspberry pi and NodeMCU (ESP8266) without internet

Question

Hello,

I want to establish a wireless connection between NodeMCU and Raspberry Pi 3.

I want it such that both the devices can be connected directly without any other wifi connection(Even if internet is not available they should be able to transmit and receive data).

And How can I observe the data received or transmitted on terminal ?

ravi_butani · Answer

You can configure nodeMcu as WiFi client and setup your Pi as access point... U can Use UDP protocol on nodeMCU to talk with Pi... At Pi end you can write simple python code to talk with nodeMcu using UDP....

https://wiki.python.org/moin/UdpCommunication refer this guide for UDP implementation On Pi...

https://learn.adafruit.com/setting-up-a-raspberry-pi-as-a-wifi-access-point/overview refer this guide for setup Access Point on Pi...

in nodeMcu arduino IDE go to example select wifi--> wifiUDPSendReceiveString Example and change #include <WiFi.h> to #include <ESP8266WiFi.h> and Loadit to your nodeMcu..

Hope it helps...

Ravi