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V 4.0. 0:
Optimize the circuit
Add I2C PORT
TYPE-C USB portFeatures:
11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported (except D0)
1 analog input( 3.2V max input)
Type-C USB Port
LOLIN I2C Port
Compatible with MicroPython, Arduino, Nodemcu
lots of Shields