Long Nguyen

I'll waiting for you. And I'll try using multiple - thread or interrupt again. Thank you so much.

I using V1.1.0. And after repair : S7Client Client_1(_S7WIFI); S7Client Client_2(_S7WIFI); It's only connect to PLC_1. The code and result I attach below. If you have any idea or see my wrong. Please tell me although it's silly. Thank you so much.

My result

I using V1.1.0. And after repair : S7Client Client_1(_S7WIFI); S7Client Client_2(_S7WIFI); It's only connect to PLC_1. The code and result I attach below. If you have any idea or see my wrong. Please tell me although it's silly. Thank you so much.

Thank you Davide Nardella, "Try to work only with the S71200, can you read and write ? Then try to work only with S7300, can you read and write ?" I did it and It's alright. So this problem in here is my manager connection. I try to use 1 Client, must disconnect to the first PLC and connect to second. But it's not good. Could you recommend for me how to create two S7Clients with two different IP add ? I using this line code: S7Client Client (_S7WIFI); Thank you so so much,

Hi Davide Nardella, I have some question: 1. After run ClientDemo.exe . I could read and write to PLC like image i attach below. It's work and no error. But I don't understand where does it related to my Arduino ? 2. After trying Read/Write from one Arduino to one PLC S7-300 again with Settimino library, it's work. But when I try to Write from one Arduino to two PLC (one S7-300 and one S7-1200), that error (errTCPDataSend | 0x0004 | Ethernet driver returned an error sending the data) appear again....

PLC S7-300 (CPU 314C-2 PN/DP || Article: 6ES7 314-6EH04-0AB0 || Version: V3.3 )

Hello Davenardella and everyone, I try to write from Arduino to PLC S7-300 (CPU 314C-2 PN/DP || Article: 6ES7 314-6EH04-0AB0 || Version: V3.3 ) but it occur this error. errTCPDataSend | 0x0004 | Ethernet driver returned an error sending the data. I don't know how to fix. Please help me. Thank you so much,