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In certain cases we need to use more than one Serial port in the case of arduino, I use the arduino mega 2560 which has 4 serial ports including the programming port, in the case of arduino's as the nano has a single programming port and as a solution Have created the softwareserial library, given the incompatibility of certain functions the softwareserial library for arduino does not work on esp8266.

Softwareserial Library

I have tested with ESP8266 NodeMCU and SoftwareSerial library of the espsoftwareserial repository created or supplied by plerup thanks for your contribution to the community.

Complete tutorials available
Tutorial completo: PDAControl Español: ESP8266 2 puerto seriales con libreria SoftwareSerial

Full Tutorial: PDAControl English ESP8266 two serial ports with SoftwareSerial library

Step 1: ESP8266 12E NodeMCU & SoftwareSerial

ESP8266 12E NodeMCU & SoftwareSerial

Test
To verify the operation of the softwareserial library, I downloaded the library for esp and I have temporarily replaced the serial software version for arduino.

Conclusions
Although this is a basic test, it requires more complete tests regarding the configuration of more serial serial ports. The idea is to use this library in future integrations in Modbus RTU, Recommended TrialCommand.com.

Step 2: Gateway: Test ESP8266 Master Modbus RTU to MQTT

Gateway: Test ESP8266 Master Modbus RTU to MQTT

Connect HMI Panasonic via RS232 to Node-RED Dashboard


Components and materials required for testing



Step 3: ​Complete Tutorials Available and Downloads

Complete tutorials available

Tutorial completo: PDAControl Español: ESP8266 2 puerto seriales con libreria SoftwareSerial

Full Tutorial: PDAControl English ESP8266 two serial ports with SoftwareSerial library

About This Instructable

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