MicroPython Forum (Archive)

Clever. Never heard about these operations. Really cool thanks.

In case anyone tries something similar: #!/usr/bin/env python from machine import SPI, Pin class ShiftRegister(): # For SPI: # MOSI -> SER # MISO -> Not used # SCK -> SRCLK # Latching -> RCLK def __init__(self, serPin, srclkPin, rclkPin, bits=8): # miso isn't used in SPI for 74HC595 set to inaccessi...

I just realized that there must also be something wrong in my code for accessing the outputs. I can control the first (Qa) but the others don't behave as expected. I thought:

shift.write(b'11111111')

would turn them all on. But that's not the case. Any idea?

For some reason it works now. The only thing is that you have to initialize the miso pin. So I just used GPIO5 which I can't access anyway. GPIO0 = MOSI -> SER GPIO3 = SCK -> SRCLK GPIO2 = latch -> RCLK 3.3V -> SRCLR OE -> empty from machine import Pin, SPI shift = SPI(-1, sck=Pin(3), mosi=Pin(0), m...

Hi there, I try to make the 74HC595N work with the ESP-01. I currently do the following without success. The ESP-01 has 4 GPIO pins (GPIO0/2 + RXD(3) and TXD(1)). So to make the software SPI I hook up the following: GPIO0 -> SER GPIO2 -> RCLK GPIO3 -> SRCLK I pull SRCLR constantly high and I have fo...

Thanks I will give it a try right away. Shift register here I come

I use esp8266-1m-20200902-v1.13 and I have the really basic ESP-01 non S chip. There are GPIO0 and GPI2 while 1 and 4 are TX/RX but they could be used for software SPI. The problem is that the class isn't available. I am using the WebREPL anyway so I don't need the serial connection.

Hi there,

I am new to micropython so maybe my question is super obvious. I try to use a shift register with the ESP01 module. For that I would need the SPI but machine.SoftSPI isn't available. Did I flash the wrong firmware or does it simply not exist?

Thanks,
Max