Did knocker-uppers only wake people up or did they have other duties?

Knocker-uppers, also known as "knocker-uppers" or "knocking-up men", were responsible for waking people up in the morning before the invention of alarm clocks. However, they also had other duties such as delivering newspapers, opening shop shutters, and ensuring that factory workers arrived on time. Some knocker-uppers were also hired to provide security services, such as patrolling the streets at night and checking on businesses to prevent theft.