ESP-12S User Manual
6
9
GND
GND
10
GPIO15
GPIO15; MTDO; HSPICS; UART0_RTS
11
GPIO2
GPIO2; UART1_TXD
12
GPIO0
GPIO0
13
GPIO4
GPIO4
14
GPIO5
GPIO5
15
RXD0
UART0_RXD; GPIO3
16
TXD0
UART0_TXD; GPIO1
2.1.
Interfaces
Table 3 Descriptions of Interfaces
Interface
Pin Name
Description
HSPI
IO12(MISO),
IO13(MOSI)
IO14(CLK),
IO15(CS)
SPI Flash , display screen, and MCU can be connected using HSPI
interface
PWM
IO12(R),
IO15(G),
IO13(B)
Currently the PWM interface has four channels, but users can extend
the channels according to their own needs. PWM interface can be
used to control LED lights, buzzers, relays, electronic machines, and
so on.
IR Remote
Control
IO14(IR_T),
IO5(IR_R)
The functionality of Infrared remote control interface can be
implemented via software programming. NEC coding, modulation,
and demodulation are used by this interface. The frequency of
modulated carrier signal is 38KHz.
ADC
TOUT
ESP8266EX integrates a 10-bit analog ADC. It can be used to test the
power supply voltage of VDD3P3 (Pin3 and Pin4) and the input
power voltage of TOUT (Pin 6). However, these two functions cannot
be used simultaneously. This interface is typically used in sensor
