The design concept is derived from the open source project NodeMCU. The development board integrates the 18650 charging and discharging system, which is equipped with charging and discharging protection, and integrates an OLED and five-way button for development.

This product operates in line with NodeMCU and adds a programmable LED, which can be controlled by GPIO16 and display the operation status of 8266.Integrated OLED with five - way button, more convenient development .

Ues: 

• The five-way buttons are controlled by FLATH,RSET,D5,D6, and D7, respectively
• OLED SDA and SCL are connected to D1 and D2 feet respectively
• Five digital pins can be configured separately the write/read/interrupt/PWM/I2C/one - wire supported

Features: 

1. The 18650 battery charging and discharging system is integrated
2. Micro USB input
3. NodeMCU compatible
4. Wide voltage input range is 5V~12V
5. One switch can control whether 18650 is powered
6. 1 programmable LED(D0)
7. 1 OLED
8. Charging protection
9. Discharge protection

Applications: 
Smart power plugs 
Home automation 
Mesh network 
Industrial wireless control 
Baby monitors 
IP Cameras 
Sensor networks 
Wearable electronics 
Wi-Fi location-aware devices 
Security ID tags 
Wi-Fi position system beacons

note: 

1. this product does not contain 18650 batteries. Do not connect the battery in reverse, otherwise it will burn the charging chip!   
2.  Please do not burn the program during charging. When you burn the program, please unplug the battery and confirm that the switch is ON   

 It is recommended to use 5V500MA charger for charging. There will be heating condition above 5V1A, which will not affect normal operation. However, do not touch or carry the charging chip during charging. 

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