Berry: Example "blink sketch" needed

[hagenbuch]

Among other things, I've read the Berry introduction but it never mentions file transactions (on Tasmota) or how to start, let's say, a state machine. I am using an ESP32 that shows the Berry console and

import math
math.sqrt(2)

etc are working.

I am using tasmota32 version 14.5.0

What I understood is the I'll have to create a file autoexec.be in the file system (worked). From that file, I'd like to start another file containing the code, so I add

load("othercode.be")

.. but then Tasmota complains a missing "->" in front of "/othercode.be" but when I add it it remains silent.

I see the "->" thing mentioned nowhere around "load" function.

Could someone please provide or point to a simple example that, say, sends strings to the log / cosole every x seconds and or that is able to make LEDs blink?

Thanks in advance
Andreas

[sfromis]

You "forgot" to post exact details of what you did when

Tasmota complains a missing "->" in front of "/othercode.be"

(The load alone is fine, what's unclear is what more you did at the same time)

Outside of load, you should not use the file name (like othercode.be) anywhere in Berry, and there is no usage of -> in load.

[hagenbuch]

OK I'll try better, sorry:

This is the content of autoexec.be

load("statemachine.de")

and this is the reaction of the logfile:

00:00:00.001 CMD: Using USB CDC
00:00:00.002 HDW: ESP32-S3 v0.2 
00:00:00.022 UFS: FlashFS mounted with 12588 kB free
00:00:00.037 CFG: Loaded from File, Count 229
00:00:00.038 SER: Set to 8N1 115200 bit/s
00:00:00.039 SER: HWCDC supports 115200 bit/s only
00:00:00.045 QPC: Count 1
00:00:00.096 BRY: Berry initialized, RAM used 3788 bytes
00:00:00.121 Project tasmota - Tasmota Version 14.5.0(release-tasmota32)-3_1_1(2025-02-18T14:37:39)
00:00:00.234 BRY: failed to load '/statemachine.be' (syntax_error - /statemachine.be:1: expected '->' before '/')
00:00:00.235 BRY: Successfully loaded 'autoexec.be'

[hagenbuch]

Ah I caught it, it's an error that occurred while "compiling" statemachine.be - Berry does not understand // comments...

I thought "failed to load" would point to a file system error while I should have understood "failed to compile" or "failed syntax check".

Sorry!

[sfromis]

Ok, Berry line comments are starting with #, or you can use block comments from #- to -# which also works over multiple lines. And you have a short-hand notation for closures with / and -> which can be very useful when needing to pass class methods as callback function to some feature.

[hagenbuch]

Thank you! I think it's great we documented that here :)