# Các Activity

- [Timers](/flows/cac-activity/timers.md)
- [Cron](/flows/cac-activity/timers/cron.md)
- [Timer](/flows/cac-activity/timers/timer.md)
- [Start at](/flows/cac-activity/timers/start-at.md)
- [Clear timer](/flows/cac-activity/timers/clear-timer.md)
- [OpenAI](/flows/cac-activity/openai.md)
- [Check message sentiment](/flows/cac-activity/openai/check-message-sentiment.md): Check sentiment of a input and return: positive, neutral, negative
- [Haravan](/flows/cac-activity/haravan.md)
- [Check customer orders in timeframe](/flows/cac-activity/haravan/check-customer-orders-in-timeframe.md): Verify whether the customer has any orders within the specified time range
- [Thông dụng](/flows/cac-activity/thong-dung.md)
- [Sending a SMS message](/flows/cac-activity/thong-dung/sending-a-sms-message.md): Send a message to a phone number
- [Create coupon](/flows/cac-activity/thong-dung/create-coupon.md)