Create a new Provider and then a new Messaging API channel. Select Messaging API as the channel type.
From the channel's Basic settings area, copy the Channel secret and paste it into Chat24Plus > Settings > Line > Synchronization > Channel secret.
From the channel's Messaging API area, generate a Channel access token (long-lived), copy it, and paste it into Chat24Plus > Settings > Line > Synchronization > Access token.
Enter your Webhook URL into Webhook URL and click Verify. Get the Webhook URL from Chat24Plus > Settings > Line > Synchronization > Webhook URL.
Enable Use webhook.
Scan the QR code with your LINE mobile app to start writing to your channel.
You're done. All messages sent to your LINE bot account will appear in the conversation admin area of Chat24Plus.