How to write with a bot in a vk conversation?

Question

PHP

I know that there was already a similar question, but still ...
I have a bot, I added it to the conversation and prescribed certain functionality for it. It should display a notification about the creation of a new post in the group. The problem is that I can't get him to send messages to the conversation, no way. With communication in PM, everything works fine)
Please tell me which request to register
here is my variant

https://api.vk.com/method/messages.send?chat_id=77&message=здесь выводится оповещение о новом посте&v=5.85&access_token=***

Answer 1

These two links should help:
https://vk.com/dev/bots_longpoll
https://vk.com/dev/using_longpoll