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The D1 Mini module
The D1 Mini module comes unsoldered with pair of eight pin male headers, a
pair of eight pin female headers and a pair of eight pin female headers with
extra long legs (which can be seen on the cover image).
Specifications
» Operating voltage: 3.3V DC
» Main chip: ESP8266
» Clock speed: 80MHz / 160MHz
» Flash: 4MB
» Digital I/O pins: 11
» Analog input pins: 1
» Analog input voltage range: from 0V to 3.3V DC
» Port: microUSB
» USB chip: CH340 chip
» On-board LED: connected to GPIO2 pin
» Dimensions: 25 x 35 x 6mm [0.98 x 1.4 x 0.24in]
» Max. current per single digital I/O pin: 12mA