Introduction to Modbus
Modbus protocol is a master-slave communications Industrial architecture (RTU), created to be implemented Modicon PLCs.
For this case we use in known ESP8266 for an application module with an industrial protocol implemented SVG SCADA and RTU Modbus Slave serial configuration
More information on this project :
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Step 1: Recommendations
To successfully complete this project I recommend you see this documentation
In this post the process of creation and design of our Scada svg explained with 2 videos:
a simple test of our scada embeded in the ESP8266 is made and asu time is powered by a 6V battery:
Step 2: Videos