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Can help with sporadic dropouts, reading errors (not available for counters). 16 - enable median filter for that meter. r - Raw binary coding (any binary telegram)
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M - MODBus binary coding with serial mode 8E1 m - MODBus binary coding with serial mode 8N1 The GPIO pin number where meter data is received. The number must be increased with each additional Meter (default 1 to 5).
Smart serial lcd modules software#
Software serial only supports 8N1 serial format. This requires recompiling the firmware to make modifications. A meter can also be defined by using compilation time #define pragmas (deprecated). In this way, only one firmware binary version is required and a modification can be made easily on the fly. This method uses the scripting language editor to define the descriptors. This interface provides a means of specifying these definitions through meter descriptors.
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There are multitudes of variants and use cases. There are many different meters that use the same protocol.
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REED contacts either in polling or IRQ mode) Resol, Viessmann)ĭecodes all kinds of binary data eg EMS heater bus Telegrams emitted by many solar thermal systems boilers (e.g. Telegrams emitted by many heaters and heat pumps (e.g. Telegrams used by many power meters and industrial devices Telegrams emitted from many smart meters, including P1 Smart Meters The following types of meter protocols are supported: Protocol The Smart Meter Interface provides a means to connect many kinds of meters to Tasmota. When using bidirectional serial io (receive and transmit), hardwareserial is recommended. If the interface detects that a script driven meter descriptor GPIO conflicts with a Tasmota GPIO setting, the interface will generate a duplicate GPIO defined error in the log and the meter descriptor will be ignored. These GPIOs must be set as None in Tasmota. To use this interface, connect the meter to available GPIO pins. Note: to use % symbol un measurement units, you need to escape it like %%. Readability may get worse so only makes sense on large descriptors. Useful if several occurrences of a text occupies a lot of space and you get short of script buffer. If present, this allows replacement of any text in descriptor by script text variables. If present, this enables some special SML script cmds and allows access to sml vars in other parts of the script. Only use if you have long strings comin in and they truncate. (default 128) Maximum number of characters per line in dump mode. (default 256) Maximum number of characters in serial IRQ buffer (should always be larger than SML_BSIZ and even larger on high baud rates). Decrease this to 1 for example if you havea meter with many lines and lots of characters per descriptorline. Complete chunk of serial data must fit into this size, so include any CR/LF if that applies. (default 48) Maximum number of characters per line in serial input buffer. (default 20) Maximum number of decode lines (html lines not counted). These parameters are explained further below in the article.