'data' or 'service_data' and other changes for remote Harmony commands and channel changing

[QbaF]

I was doing simple remote.harmony integration. On/off was working as a charm. But I faced problem with remote.harmony_change_channel
I tried to make it accordingly to HA documentation

Unfortunately with no success and with errors like:
‘Failed to call service remote/change_channel. Service not found.’

It was the easier one as the error text is more user-friendly, so after some investigations I went to HA Developer Tolls and found that the correct service name is *remote.**harmony_*change_channel

But that was not end of the problems. After correcting service name I did get error
‘Failed to call service remote/harmony_change_channel. required key not provided @ data[‘channel’]’
Less obvious for me, the noob. After much longer searching I did found that it shouldn’t be data: but service_data:.

After these changes, it works.

I spend some time finding the solutions and didn’t find a similar topic, so maybe that will be useful for anybody else.
Secondly, maybe someone will explain where the mentioned differences come from? Historical changes? Different uses in different places?

[Tediore]

Were you trying to call that service using an entity button or something similar in Lovelace?
service_data is required for Lovelace cards. That is documented here. Admittedly, it is a little confusing.

As for the docs saying remote.change_channel in the example instead of remote.harmony_change_channel you could submit an edit to the docs correcting that

[QbaF]

It was in picture card (which was in horizontal-stack which was in vertical-stack).
Could it be unified or allowed to use interchangeably.

@Tediore

you could submit an edit to the docs correcting that

Thanks, that is something I didn’t know. But to be honest, I still do not feel competent enough. Vide this data/service_data case where I am only partially right. As I understand, it is safe to make changes. In fact not changes but suggestion checked by someone more competent. In harmony_change_channel case suggestion done.