However , consistent transatlantic signalling was difficult to establish .
In 1901 , Marconi built a station near South Wellfleet , Massachusetts that sent a message of greetings on 18 January 1903 from United States President Theodore Roosevelt to King Edward VII of the United Kingdom .
Consistent transatlantic signalling was difficult to establish .
In 1901 , Marconi built a station near South Wellfleet , Massachusetts that sent a message of greetings on 18 January 1903 from United States President Theodore Roosevelt to King Edward VII of the United Kingdom .