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SD WIFI PRO

image-20230327135120562

1. Introduction

This is a brand new SD WIFI, we call it SD WIFI PRO, or SWP for short. It is based on ESP32-PICO device and SD 7.0 size standard. By default, we provide a set of open source and available websever firmware, which has complete file upload and download functions, and can basically meet the needs of remote management files in the LAN. In addition to the necessary SD transmission pins, SWP also leads out redundant pins. In addition to being used for firmware updates, it can also be used for other device control through the serial port/I2C, so as to realize remote upload files, send control commands and many other operations. It can also be used in scenarios other than 3D printing, such as Flash Air (TOSHIBA), ez Share (Ez Share) and other products on the market, for file sharing, such as quickly transferring photos in the camera without a data cable to the phone. It is not only a completely open source product, but also a wireless SD product development kit, which provides more possibilities according to your imagination.

2. Feature

  • Based on ESP32 PICO D4, with 4MB Flash
  • 2.4G Wifi & Bluetooth
  • SD 7.0 size standard, SDIO/SPI compatible golden finger, and additional serial port and I2C interface
  • Built-in 8GB high-speed memory
  • Comes with SD Reader and Flash Uploader development board
  • Fully open source hardware and software

3. Application

3D printers, and other devices that require wireless access to SD cards.

4. Hardware Guide

4.1 Pin Functions

image-20230328082527339

Pin Name Input Output Function
1 SDIO_D3 Built-in Flash pin, SPI: CS
2 SDIO_CMD Built-in Flash pin, SPI:MOSI
3 GND Ground
4 3V3 3.3V power supply voltage for SWP(3.0-3.6V @300mA+)
5 SDIO_CLK Built-in Flash pin, SPI: CLK
6 GND Ground
7 SDIO_D0 Built-in Flash pin, SPI: MISO
8 SDIO_D1 Built-in Flash pin, SPI: NC
9 SDIO_D2 Built-in Flash pin, SPI:NC
10 GPIO_32 OK OK ADC1_CH4,
TOUCH9,
RTC_GPIO9
11 GPIO_26 Ok OK GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
12 GPIO_2 OK OK must be left floating or LOW to enter flashing mode
ADC2_CH2,
TOUCH2,
RTC_GPIO12,
HSPIWP, HS2_DATA0,
SD_DATA0
13 GPIO_0 pulled up OK outputs PWM signal at boot, must be LOW to enter flashing mode
ADC2_CH1,
TOUCH1,
RTC_GPIO11,
CLK_OUT1,
EMAC_TX_CLK
14 ESP_EN Enable (EN) is the 3.3V regulator’s enable pin. It’s pulled up, so connect to ground to disable the 3.3V regulator. This means that you can use this pin connected to a pushbutton to restart your ESP32, for example.
15 GPIO_3 / RX0 OK RX pin HIGH at boot
16 GPIO_01 / TX0 TX pin OK debug output at boot
17 GPIO_22 / I2C_SCL OK OK GPIO22, VSPIWP, U0RTS, EMAC_TXD1
18 GPIO_21 / I2C_SDA OK OK GPIO21, VSPIHD, EMAC_TX_EN
19 GPIO_19 OK OK GPIO19, VSPIQ, U0CTS, EMAC_TXD0

4.2 Uploader & Card Reader Board (SWP Dev Board) Instructions

image-20230328092433777

4.2.1 Function Description

image-20230328092415667

  1. SD7.0 21Pin Socket

  2. All pins out Of SWP

  3. Card reader chip (USB2.0) & USB switch chip

  4. USB Type-C Connector

  5. Firmware automatic download and serial debugging circuit (CH340)

  6. Mode/function selection DIP switch, It is defined as follows:

Switch pin Status Mode/Function
1
The control pin of the built-in Flash interface switching chip,it is connected to GPIO_26 of ESP32, pull-up resistor. By default, Flash interface is connected to the golden finger of the SD shell.
ON Built-in 8GB Flash is connected to ESP32.
1 OFF Built-in 8GB Flash is connected to the golden finger of the SD shell.
2
The control pin of the USB switching chip, pull-down resistor, USB is connected to the card reader chip by default.
ON USB connect to CH340 for firmware download and debugging
2 OFF USB connect to Card reader for reading built-in 8GB flash.

4.2.2 USE the dev board as a SD socket

For motherboards without SD card sockets, SWP may not be convenient to connect. At this time, you can use the development board as a socket, and only need to connect it to the original SPI interface of the motherboard. For some boards that only have a TF card holder and do not have an SPI interface reserved, it will be more troublesome, but there are many cheap TF to SD card boards available for sale.

5. Firmware Guide

The source code is at SdWiFiBrowser, current release is swd 0.x version, the more description about the version at README.md

A new version is coming soon.

6. Part List

  • SD WIFI PRO x1
  • Uploader & Card Reader Board x1

7. Documentations

ESP32 PICO Series Datasheet
ESP32 PICO Series Datasheet CN
Uploader & Card Reader Board Schematic
SD WIFI PRO Schematic
Firmware

8. Where to buy

aliexpresstaobao fysetc

9. Tech Support

Please submit any technical issue into our forum ,github,facebook, Discord。

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