Hey guys I wanted to receive data from DELTA DOP-103BQ HMI to my mega via MAX485 module I’m doing a project where I have to replace A PLC with Arduino the project is as follows
The HMI stores the excel file that contains Barcode data Against a Specific part no.
I have to connect a barcode reader to Mega , the Mega will also be responsible for giving an output if the selected part no. In HMI matches the scanned Barcode that is stored in the Mega, I have successfully connected the Barcode scanner to the MEGA now what remains is to make sure that the part no. (Barcode)Selected on the HMI is communicated to the MEGA I have some sample Configuration for simple modbusmaster but have no idea about the program or how to even being with plus is there any other method to do so
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