Micropython ESP8266 74HC595 SPI Test

# Micropython ESP8266 74HC595 SPI Test
# In this setup, I will control SIPO module 74HC595 using SPI of Lolin/NodeMCU module ESP8266
# I will send data 00h, then check the Q0 pin value (variable: s00), must return 0
# I will send data 01h, then check the Q0 pin value (variable: s00), must return 1
# I will send data FFh, then check the Q0 pin value (variable: s00), must return 1
# You can check other pins (Q1..Q7) using voltmeter if you want
# Pinout:
#  Q1<=>
#  Q2<=>
#  Q3<=>
#  Q4<=>
#  Q5<=>
#  Q6<=>
#  Q7<=>
# GND<=>GND
# Q7'<=>
# ~MR<=>3V3
#  SH<=>D5/14/SCK
#  ST<=>D2/2
# ~OE<=>GND
#  DS<=>D7/13/MOSI
#  Q0<=>D4/2
# VCC<=>3V3

from machine import Pin,SoftSPI
spi=SoftSPI(baudrate=100000,sck=Pin(14),mosi=Pin(13),miso=Pin(12))
sst=Pin(4,Pin.OUT,value=0)
s00=Pin(2,Pin.IN)

sst.off()
spi.write(b'\x00')
sst.on()
print('00',s00.value())

sst.off()
spi.write(b'\x01')
sst.on()
print('01',s00.value())

sst.off()
spi.write(b'\xFF')
sst.on()
print('FF',s00.value())