Banggood.com
Recommended reading: Best ESP8266 Wi-Fi Development Board
Scroll down the page to compare the ESP-01 Board price at different stores. You might also consider buying a ESP-01 Serial Programmer Adapter.
Ebay.com
Aliexpress.com
€2.71
in stock
1 new
from €2.71
as of July 6, 2020 7:38 pm
Amazon.es
£6.80
in stock
1 new
from £6.80
as of July 6, 2020 7:38 pm
Amazon.co.uk
€9.79
in stock
1 new
from €9.79
as of July 6, 2020 7:38 pm
$13.98
in stock
1 new
from $13.98
as of July 6, 2020 7:38 pm
ESP8266 is a highly integrated chip designed for the needs of a new connected world. It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to establish an Internet connection.
Learn more about the ESP8266 board: