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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
€2.68
1 new
from €2.68
as of December 10, 2019 1:39 pm
Amazon.es
€3.09
1 new
from €3.09
as of December 10, 2019 1:39 pm
Amazon.de
£6.80
1 new
from £6.80
as of December 10, 2019 1:39 pm
Amazon.co.uk
$13.98
1 new
from $13.98
1 used from $10.95
as of December 10, 2019 1:39 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: