FastLED - addressable_set - trouble setting colour with a lambda statement

ESPHome
21

I was also thinking that but got compile error. Tried with brackets and same thing.

Compiling /data/frontdoorledsrip/.pioenvs/frontdoorledsrip/src/main.cpp.o
src/main.cpp: In lambda function:
src/main.cpp:475:14: error: invalid conversion from 'const char*' to 'uint8_t {aka unsigned char}' [-fpermissive]
       return "1";
              ^
*** [/data/frontdoorledsrip/.pioenvs/frontdoorledsrip/src/main.cpp.o] Error 1
========================= [FAILED] Took 11.01 seconds =========================
22

What about

!lambda: |
  uint8_t amount = "1";
  return amount;
23

Had to change your syntax to the following so it would compile,

            red: !lambda
                   'uint8_t amount = 1;
                    return amount;'

With quote got the following,

src/main.cpp: In lambda function:
src/main.cpp:475:24: error: invalid conversion from 'const char*' to 'uint8_t {aka unsigned char}' [-fpermissive]
       uint8_t amount = "1"; return amount;
                        ^
*** [/data/frontdoorledsrip/.pioenvs/frontdoorledsrip/src/main.cpp.o] Error 1
========================= [FAILED] Took 10.86 seconds =========================

Without quote around the 1 it compiled but unfortunately did not work.

24

Looks like you are doing integer math, not floats. Maybe that’s related to your problem.

25

I am starting to think this might be a defect. Nothing I put in the return actually delivers a result. Hardcoding the value works. The documentation has an example which implies it should work.

Being new to ESPHome how do we get someone to look at it?

26

I think you open an issue over at https://github.com/esphome/issues/issues/new?template=bug_report.md

27

When I look at https://esphome.io/guides/automations.html#config-templatable it seems like the value returned by the lambda should be a floating point number between zero and one, based on the example there.

So it seems like you should have the lambda return a floating point number (e.g., do arithmetic in the expressing using a floating point constant like 100.0) between 0 and 1.0.

To test this, just write a lambda that returns 0.5 and see if that does the expected with a 50% brightness.

28

I did try that, didn’t turn on. So I decided to pursue a different path, going to see if I can use partitions and effect to code what I what.