the master chip using ESP8266, with CP2104 USB to serial chip, lithium battery interface and charge and discharge circuit, 32MByte Flash, WIFI antenna, 0.91-inch OLED display.
Can be programmed for Arduino and NodeMCU environments. Operation is consistent with NodeMCU.
Leads all pins of ESP8266
12 digital pins can be configured to read, write, IIC, SPI, the middle, PWM and other functions
1 AD input
Integrated 0.91-inch 128 * 32 OLED
Working voltage: 3.3V ~ 7V
Color: picture color
Material: PC + metal
Package Contents: 1*ESP8266 WIFI Bluetooth Development Board
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.