Rules IF ELSE ELSEIF and AND OR Support - stodev-com-br/Tasmota GitHub Wiki
This feature is not included in precompiled binaries.
To use it you must compile your build. Add the following to user_config_override.h
:
#define USE_EXPRESSION // Add support for expression evaluation in rules (+3k2 code, +64 bytes mem)
#define SUPPORT_IF_STATEMENT // Add support for IF statement in rules (+4k2 code, -332 bytes mem)
- Support IF, ELSEIF, ELSE
- Support for
<comparison>
and<logical expression>
as condition - Support for executing multiple commands
- Support for nested IF statements
- Available free RAM is the only limit for logical operators, parenthesis, and nested IF statements.
Note: All the commands executed within an IF block are performed via Backlog
<if-statement>
IF (<logical-expression>) <statement-list> {ELSEIF (<logical-expression>) <statement-list>} [ELSE <statement-list>] ENDIF
<logical-expression>
<comparison-expression>
-
(
<comparison-expression>
|<logical-expression>
)
{{AND
|OR
}<logical-expression>
} -
(
<logical-expression>
)
{AND
|OR
}<logical expression>
}
<comparison-expression>
-
<expression>
{=
|<
|>
||
|==
|<=
|>=
|!=
}<expression>
<statement-list>
-
<statement>
{;
<statement>
}
<statement>
- {
<Tasmota-command>
|<if-statement>
}
IF statement supports 3 formats:
IF (<condition>) <statement-list> ENDIF
IF (<condition>) <statement-list> ELSE <statement-list> ENDIF
IF (<condition>) <statement-list> [ELSEIF (<condition>) <statement-list> ] ELSE <statement-list> ENDIF
<condition>
is a logical expression, for example:
-
VAR1>=10
-
Multiple comparison expressions with logical operator
AND
orOR
between them.AND
has higher priority thanOR
. For example:
UPTIME>100 AND MEM1==1 OR MEM2==1
Parenthesis can be used to change the priority of logical expression. For example:
UPTIME>100 AND (MEM1==1 OR MEM2==1)
-
The following variables can be used in
<condition>
:Symbol Description VAR<x> variable (<x> = 1..MAX_RULE_VARS
, e.g.,VAR2
)MEM<x> persistent variable (<x> = 1..MAX_RULE_MEMS
, e.g.,MEM3
)TIME minutes past midnight UPTIME uptime minutes UTCTIME UTC time, UNIX timestamp, seconds since 01/01/1970 LOCALTIME local time, UNIX timestamp SUNRISE current sunrise time (minutes past midnight) SUNSET current sunset time (minutes past midnight)
<statement-list>
- A Tasmota command (e.g.,
LedPower on
) - Another IF statement (
IF ... ENDIF
) - Multiple Tasmota commands or IF statements separated by
;
. For example:
Power1 off; LedPower on; IF (Mem1==0) Var1 Var1+1; Mem1 1 ENDIF; Delay 10; Power1 on
Backlog
is implied and is not required (saves rule set buffer space).
Rule used to control pressure cooker with a Sonoff S31. Once it is finished cooking, shut off the power immediately.
Rule1
on system#boot do var1 0 endon
on energy#power>100 do if (var1!=1) ruletimer1 0;var1 1 endif endon
on tele-energy#power<50 do if (var1==1) var1 2;ruletimer1 600 endif endon
on rules#timer=1 do backlog var1 0;power off endon