Arduino + ESP8266 + Software Opto22 example Scada Industrial


Has made the integration of Arduino + ESP8266  + Software Opto22, implementing its environment scada right through IP and Modbus TCP Modbus RTU, the idea is to implement this hardware in the industry for both monitoring and control.

1- Arduino MEGA 2560 Master Modbus Potenciometer Display  Oled 

The Arduino configured as Modbus RTU master sends the value of the potentiometer to the slave in this case a slave simulator.
More info :  

Arduino Mega 2560 Oled Display I2C Master Modbus RTU Scada Industrial Connection

Updated 2017 for TrialCommand

Arduino Master & ESP8266 Slave Modbus RTU (TTL)


2- ESP8266 Bridge  Slave Modbus TCP – Slave Modbus RTU 

ESP8266 test Registers as a bridge between Modbus RTU and Modbus TCP IP (Ethernet)
More info:

ESP8266 Mode Bridge Modbus RTU Slave – Modbus TCP IP Slave

Updated 2017 for TrialCommand Modbus TCP/IP no libraries

3- Arduino Mega 2560 + ESP8266  Modbus RTU Modbus TCP IP Industrial Applications

ESP8266 + Arduino Mega ready to connect to SCADA OPC PLC  Performing a mixed industrial network Modbus RTU Modbus TCP IP
More info: 

4- Installation PAC Project Basic and  Simulator PAC Sim

process software download and installation of software for Opto 22 controllers in this case download the PAC Project Basic, which includes software programming, design HMI and SCADA Runtime
More info: 

Download and Installation of PAC Project Basic + PAC Sim (Simulator Opto22)


5- Download Strategy Modbus TCP IP Master in PAC Project Basic Opto22 

Opto22 example of strategy setting according to requirement as master or slave Modbus TCP, in this case for integration is configured as Modbus TCP master is discharged are configured holding registers for reading and writing respecting addressing.

More info:

Download and Installation of PAC Project Basic + PAC Sim (Simulator Opto22)


Final test

Arduino ESP8266 SCADA Industrial integration on Opto 22 
This is the integration of the previous 5 tutorials
Arduino + ESP8266 + PAC Project Basic + PAC  SIM

Photos tests

Display Oled


Arduino Mega 2560



Materiales Very cheaps!!

1 Display Oled 128×64 I2C
1 Potenciometer 100k
1 protoboard
1 Battery 6v lead acid
1 Regulator 5 – 3.3 vdc

Conections  Arduino Mega 2560


  Connections ESP8266 

Pac Display Runtime Online


Pac Project Basic 



Arduino IDE Code


Channel Youtube



Leave a Reply