custom_protocols
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| custom_protocols [2022/08/12 10:19] – [readRegister] emozolyak | custom_protocols [2023/02/21 17:52] (current) – [writeRegister] emozolyak | ||
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| ====== Custom protocols ====== | ====== Custom protocols ====== | ||
| - | There are a lot of different automation devices with non-standard communication protocols. To solve the problem of data collection from such devices in WebHMI, it is possible | + | There are a lot of different automation devices with non-standard communication protocols. To solve the problem of data collection from such devices in WebHMI, it is possireble |
| ===== About Lua ===== | ===== About Lua ===== | ||
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| The function readRegister should read the specified register. | The function readRegister should read the specified register. | ||
| - | In case of successful reading, the function readRegister should return an array of bytes, with length corresponding to the specified data type (1, 2 or 4) or the number. In case of failure, you must return false. | + | In case of successful reading, the function readRegister should return an //(lua table)// **array of bytes, with length corresponding to the specified data type** (1, 2 or 4) or the number. In case of failure, you must return |
| Three parameters are passed to it as arguments: | Three parameters are passed to it as arguments: | ||
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| The writeRegister function should write a new value to the specified register. If the record is successful, it should return true. In case of an error, false. | The writeRegister function should write a new value to the specified register. If the record is successful, it should return true. In case of an error, false. | ||
| - | Ей передаются все те же параметры, | + | It has the same arguments as the readRegister, |
| The writeRegister function may use the same methods of reading from and writing bytes to the port. | The writeRegister function may use the same methods of reading from and writing bytes to the port. | ||
custom_protocols.txt · Last modified: 2023/02/21 17:52 by emozolyak