User's Manual

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3. Functional Description
3.4. Interface Description
Table 3-1. Interface Description
Interface Pin Functional Description
PWM
IO12 (R), IO15 (G),
IO13 (B)
Currently the PWM interface has four channels, but users can extend it
to five channels. PWM interface can realize the control of LED lights,
buzzers, relays, electronic machines, etc.
IR
IO14 (IR_T), IO5
(IR_R)
The functionality of the infrared remote control interface can be realized
via software programming. The interface uses NEC coding, modulation,
and demodulation. The frequency of the modulated carrier signal is 38
kHz. (You can configure this interface to other GPIO)
I2C IO14 (SCL), IO5 (SDA)
Connects to external sensors and display screens, etc. (You can
configure this interface to other GPIO)
Espressif ! !8
2019.01
UART
UART0: IO15
(U0TXD), IO13
(U0RXD)
Communicates with the UART device.
Downloading: U0TXD + U0RXD or GPIO2 + U0RXD
Communicating (UART0): You need to exchange the inner pins of UART
in the software before use IO15 (U0TXD) and IO13 (U0RXD).
Interface Pin Functional Description
CONFIDENTIAL