Berry questions: can i use a berry variable in tasmota.cmd?

[forumlw06]

Hello, i am working through berry (trying to move rules on my ZB Bridge Pro to berry) and am at the very beginning of my berry journey.

For one of my door sensors i executed following berry functions in berry console:

def DS1Handler(value, trigger)
	print ("-BE- DS1Handler (value:",value," / trigger:",trigger,")")
	tasmota.cmd('WebSend [m] script>D=16;P1=value')
	if (value == 0)
		print ("--- Closed ---")
	elif (value == 1)
		print ("--- Open ---")
	end
end

tasmota.add_rule("DS1#Contact", DS1Handler)

The berry variable "value" is not passed to tasmota. How can i pass the content of "value" to tasmota (and not the string "value")?

Sorry for the beginner question and thanks in advance!

One additional question: if i use "tasmota.add_rule" like above do i have the same space limits as if i would use native tasmota rules??

Kind Regards Rainer

[sfromis]

Short answer, no you cannot use a Berry variable in a Tasmota command, as these are executed outside of Berry.

What you can do instead is to put the value of the variable in the command, like this use of f-strings:
tasmota.cmd(f'WebSend [m] script>D=16;P1={value}')

Using f-strings can also be quite handy for debugging print like:
print(f"-BE- DS1Handler ({value=} / {trigger=})")

As Berry integration tasmota.add_rule is unrelated to "classic" Tasmota rules, there are no similar space restrictions, and you need to make sure to have the Berry code setting up tasmota.add_rule (as with other Berry code) saved in the file system, as they are not persistent otherwise.

[sfromis]

https://tasmota.github.io/docs/Berry-Cookbook/#adding-commands-to-tasmota

[forumlw06]

Thanks, i read through the docs, but was wondering how i could use that to pick up variable value. Maybe i am unclear about the interference between berry and tasmota.
In my old scripter (8266) approach i have a script that catches variable changes (sent from other devices through websend and passed to the scripter script) in the ">E" section and based on these variables some logic is performed. Looking for something similar in the berry world.

But maybe there is a better approach in berry?

[sfromis]

The point is that you can parse the command parameter(s), and assign Berry variables. Of course, you can code all sorts of logic there, like doing things in addition to merely picking up values to assign to variables.

What you ask for is more like the first simplistic example I posted, using the Br command.

[sfromis]

Here's a random example of a Berry program adding a command, and doing something.
https://github.com/btsimonh/TasmotaBerryPLay/blob/master/timelapse/camdriver.be
Look for cmdZapFolder, you don't have to understand the full program.

[forumlw06]

Thanks very much, i will have a look.
Lot to learn ....