level2:communication_between_2_webhmis_via_internet
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level2:communication_between_2_webhmis_via_internet [2022/01/14 16:06] – ↷ Links adapted because of a move operation emozolyak | level2:communication_between_2_webhmis_via_internet [2022/02/09 15:16] (current) – [Option 2. VPN and Modbus TCP] emozolyak | ||
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- | ====== Communication between 2 WebHMIs via internet ====== | + | ====== Communication between 2 or more WebHMIs via internet ====== |
Sometimes you need to have a connection between far systems, e.g. like in the following picture: | Sometimes you need to have a connection between far systems, e.g. like in the following picture: | ||
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With the WebHMI and Level2 connectivity options it is done with ease: | With the WebHMI and Level2 connectivity options it is done with ease: | ||
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+ | ==== Option 1. Using MQTT protocol ==== | ||
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+ | - Connect both WebHMIs to the Level2 IoT | ||
+ | - Subscribe the pump station WebHMI to the topic with level that far WebhMI publish onto the Level2 MQTT broker. | ||
+ | |||
+ | ==== Option 2. VPN and Modbus TCP ===== | ||
-[[level2: | -[[level2: | ||
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-Enable [[: | -Enable [[: | ||
-Create Modbus TCP connection on the pump side WebHMI using IP address from (1) | -Create Modbus TCP connection on the pump side WebHMI using IP address from (1) | ||
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+ | <WRAP center round tip 60%> | ||
+ | __Option 1__ Is preffered due to the nature of the MQTT protcol which saves traffice for communication while Modbus TCP will create constant polling process. | ||
+ | </ | ||
+ |
level2/communication_between_2_webhmis_via_internet.1642176399.txt.gz · Last modified: 2022/01/14 16:06 by emozolyak