The president, who almost every day of his working life speaks to huge audiences from a podium, was forced to address Turks from a simple mobile phone.
Astonished Turks saw the president, looking rattled and drawn, peer out of the screen not in person but from a smartphone.
Presenters on the NTV and CNN-Turk channels, who seemed as astonished by the situation as anyone, held smartphones up to the camera with a microphone beneath to broadcast interviews with Erdogan to the world.
Erdogan asserts control as Turkey coup bid falters
The president appeared stressed but also defiant, issuing a call to supporters to rally in the streets which was rapidly followed in Ankara, Istanbul and Izmir.
"I certainly believe that coup plotters will not succeed," Erdogan told CNN-Turk television, speaking on FaceTime via mobile phone in his first reaction to the move.
"I urge the Turkish people to convene at public squares and airports. I never believed in a power higher than the power of the people."
Erdogan said he was still president and Turkey's commander in chief, promising that plotters would pay a "very heavy price".
90 killed as Turkish coup bid crumbles, Erdogan returns
He had not been seen in public for the last days, with the president believed to be taking his annual summer vacation on the Aegean Sea in the resort of Marmaris.
He later gave a brief statement on the doorstep of a hotel in Marmaris, Dogan news agency reported.
"I await all the people in the airports, the squares and the streets," said Erdogan.
"Our nation can be calm. Our Prime Minister (Binali Yildirim) has made the necessary announcements."
A presidential source said Erdogan was in a secure location as per government protocol.
Erdogan has faced down significant challenges before including the 2013 wave of protests against his rule and has also cracked down on followers of his arch-enemy Fethullah Gulen.
Attempted coup in Turkey: what we know so far
Elected on a wave of popular support, in particular from conservative and pious Muslim voters, Erdogan has dominated Turkish politics since he first become premier in 2003.
He took the office of president in 2014 polls and if he seeks a second mandate could in theory stay in power until 2024.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ