--- title: "WIZnet Pico Board+Cat.M1 Development Kit" url: "https://maker.wiznet.io/bruno/projects/wiznet-pico-board-cat-m1-development-kit/" markdown_url: "https://maker.wiznet.io/bruno/projects/wiznet-pico-board-cat-m1-development-kit/md" type: "WCC: WIZnet Created Content" author: "bruno" author_url: "https://maker.wiznet.io/bruno/" original_author: "Bruno" published: "2023-06-23" language: "en" hardware: ["WIZnet W5100S-EVB-Pico"] likes: 0 views: 1330 comments: 0 source: "WIZnet Makers (https://maker.wiznet.io/)" --- # WIZnet Pico Board+Cat.M1 Development Kit > Developed WIZnet Pico Board+Cat.M1 Dev Kit for basic education. Enables hardware expansion with pico form factor and Cat.M1 communication. Original author: Bruno ## Components - **WIZnet W5100S-EVB-Pico** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5100S/w5100s-evb-pico)) ## Article Introduction The main reason for hardware development is to use it as a product for basic lectures. The project developed an expandable product based on the pico form factor. This is to provide learners with the experience of actually assembling and expanding devices while taking basic hardware-related lectures. The pico form factor is ideal for this purpose as it has a compact and economical form factor and offers expansion ports for adding various functions and sensors. In addition, Cat.M1 (category M1) communication and WIZnet Pico Board (W5100s-evb-pico) will be used during lectures. Cat.M1 is a low-power, long-distance communication technology that features low-cost device-to-device communication over the Internet. WIZnet Pico Board is a board that provides functions for Ethernet communication and will be used to transmit and control data in conjunction with Cat.M1 communication. For this reason, the WIZnet Pico Board+Cat.M1 development kit was created. This development kit will be used as a tool for learners to expand hardware based on the pico form factor, experience and practice Cat.M1 communication. Board Spec - W5100s-evb-pico module - module pin header socket - OLED - 5V Relay connection port - DC jack inner diameter 2 pie, outer diameter 7 pi - Cat.M1 - 3 color RGB LED - Light sensor - Rated DC 5V, 1A ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687545062%2Epng) Board placement considerations include: - W5100S-EVB-Pico: W5100S-EVB-Pico is placed on the right side so that sensors or modules can be freely placed on the right side of the board. - OLED: OLED is placed in the center to improve visibility. By placing the OLED in a central location, users can easily check the information. - LTE modem: Consider placing the LTE modem on the left side so that the antenna can go out of the board. Adequate space was reserved for the LTE modem to connect externally. - Switch: The switch is placed at the bottom of the center so that users can easily press it with their hands. The location of the switch was decided considering the user's convenience. - RGB LED and CDS: The RGB LED and CDS are placed away from each other. By doing this, the CDS is less affected by the illuminance of the LED. - Connectors: USB connector, DC JACK, RJ45, etc. are placed slightly exposed to the outside of the board. This makes it easy to access and mate these connectors when working on the case. - 3-pie holes: 3-pie holes are placed on each corner so that the board can be fixed using 3-pie screws or PCB supports. By doing this, you can increase the stability of the board. 1st board development - circuit design ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687545318%2Epng) - Artwork ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687545399%2Epng) - Sample board production completed ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687545425%2Epng) Each part is designed as shown in the image below. - W5100s-EVB-PICO ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687545986%2Epng) - Relay : Connected to GPIO22 (PIN 29). Active High ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687547285%2Epng) When 0V voltage is applied, 0V output comes out (left image) When 3.3V voltage is applied, 5V output comes out. (Image on the right) ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687547299%2Epng) - Switch : Connected to SW 1 – GPIO3(PIN 5), SW 2 – GPIO4(PIN 6), SW 3 – GPIO5(PIN 7) Active Low ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687547601%2Epng) Switch No. 1 test video, when the switch is pressed, 3.3V -> 0V can be seen on GPIO3 (PIN 5) [Embedded media](https://www.youtube.com/embed/uyENyGVDFZ0) - cds : Connected to GPIO26/ADC0(PIN 31) *ADC operating power supply from Pico Board ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687550824%2Epng) The voltage level is lower when the light is bright and higher when it is dark. [Embedded media](https://www.youtube.com/embed/0NrxwifRj9E) - RGB LED : Active Low Connected to Red – GPIO7(PIN 10), Green – GPIO10(PIN 14), BLUE – GPIO11(PIN 15) ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687551208%2Epng) - Voltage is LM1117 LDO (5V 1A) power supply design ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687551372%2Epng) - OLED : Connected to SCL – GPIO13(PIN 17), SDA – GPIO12(PIN 16) ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687551420%2Epng) - RS232 : Connected to TXD – GPIO8(PIN 11), RXD – GPIO9(PIN 12) ![](https://maker.wiznet.io/upload/ckeditor5/713489772%5F1687551459%2Epng) The final board, including the final operation, will be explained next time. thank you --- Source: https://maker.wiznet.io/bruno/projects/wiznet-pico-board-cat-m1-development-kit/