Understanding Code and Error

ESPHome
1

I have been trying to get some code working for sometime now, mostly by cut, paste & edit as I am not a programmer, but learning as I am going. I can’t seem to find any examples or good tutorials that explain the different parts of the Lambda code, or at least this detail of it. I have this bit of code under the Binary Sensor:

Code
Code1243×505 64.1 KB

But when I compile it, I keep getting this error:

Error
Error911×180 35.9 KB

Is there somebody that can explain what is going on here? I am not sure what the “open” & “stop” are referring too.

Also, any good recommendations on more info on stuff like this? I have searched through ESPhome.io, but it does not seem straight forward, or have found any books on ESPhome. Any suggestion would help.

2

You are trying to call open() and close() on the A4899 stepper motor driver component. This conponent only knows how to control a motor (let’s say the axle).

To see the list of functions that you can invoke here (eg set_target), see this page: Stepper Component

The open and close are available for the Cover component so I guess what you are missing is a link between your stepper motor and a Cover.

Regarding lambda’s: that is the “advanced” part of esphome. In many cases lambda’s should not be needed. In order to understand how this works you need some (basic) knowledge on C/C++

1 Like