seeed lcd displays for raspberry pi quotation

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There are few e-ink, e-paper, displays available for the Raspberry Pi of varying sizes but the controller boards they connect to have different features and connections.

Seeed Studio have a range of e-ink displays for the Raspberry Pi and Ardunio boards. For this guide I have chosen the 2.13 inch 3 colour display and controller board which fits snugly on the Raspberry Pi Zero/W.

E-Ink displays are are low powered as they only require power to change the image. Once the image it is on the screen it does not need power to keep it there. So you can disconnect the screen and still see the image, which makes them popular as electronic name badges or seating name plates and even on shelf price labels. If you are using a battery to power you RPi then the low power consumption compared to LCD display would be an advantage.

e-ink displays don"t need a backlight like LCD displays do and are easily readable in bright sunlight. They also have a wide viewing angle so the image looks the same from the side as it does from the front unlike LCD displays that have a limited viewing angle.

The disadvantage compared to LCD and displays is they are usually only 2 or 3 colours and it can take about 6-8 seconds for black and white image to update and around 15 seconds for a 3 colour display to update. Though this is a long time for an image to be displayed, they are not designed to be used where the display will change often. It"s recommended that if the screen is to change frequently then it should be about 3 minutes apart. Though short bursts of changes can be done within a few seconds of each image changing.

The 3 colour displays are available in black & yellow or black & red with the third colour being white, effectively no image. These take longer to update than the black and white displays because of the way they update. The image is displayed in two stages, first the black parts of the image is displayed and then the coloured parts of the image are displayed. Which is why they take twice as long to update.

This animation shows how the display updates. The text is black and red and the Hydra Dragons picture contains red in the eyes so they update in two stages. The image of the Earth is only Black so updates quicker.

The screen and the controller board are not connected in the box. The screen has a sticky backing to hold it permanently to the controller board but you will need to maneuver the connector cable through a hole in the board and into the connector before you stick the screen down.

The controller board connects to the Raspberry Pi Zero/W via the GPIO port or through a Grove connector used for modular electronics setups and Seeed Studios"s small Grove shield for the Raspberry Pi zero and full size Grove shield for the Raspberry Pi"s 4,3,2,1 . Communication is through 4 wire SPi using the GPIO port or I2C through the Grove port.

It has two buttons that are connected to the GPIO BCM pins 20 and 21 so you can program them directly via the GPIO port. These could be used to switch between two images or used as a convenient off switch for the Raspberry Pi. The input voltage can be either 3v3 or 5v as there is a built in voltage converter which can be changed by use of a switch mounted next to the Grove port.

It can also be programmed with Python using modified drivers from WaveShare. The WaveShare install instructions for the c and python library are here including the instructions on installing the additional broadcom libraries required, initial setup and demos.

For the screen to work you need a driver file which will have a name like epd2in13bc.py and the config file named epdconfig.py in the lib folder or epdiff.py if you are using the soonuse libraries.

These drivers need to be modified to work with the Seeed e-ink driver board.This is because the gpio pin assignments need altering. If you edit the epdconfig or epdiff files in a text editor you will see a pin assignment section like this

The screen uses SPi which uses pins 10 & 11. Make sure that the SPi driver has been enabled in the Raspberry Pi Configuration menu. The two buttons on the controller board use GPIO bcm pins 20 & 21.

The screen requires two images to make the final image. One needs to represent black and other for red. These should be a 2 colour bmp files of 212 x 104 pixels. They can be created by hand in a image editor and saved to your program folder or created on the fly using pythons Pillow graphics library. This is the simplest option if you intend to use text as Pillow can be used to convert text into an image as well as build the required image from multiple elements.

The display is good quality and works well. Seeed Studio supply a drive for c programmers. As I program in python I initially couldn"t find a driver for python that worked with the screen. Until i discovered the pin assignments needed changing in the python drivers first. Once the simple modifications are done, it works as good as other display hats on the market but has the additional features of 2 GPIO buttons, a 3v3 to 5v switch and the option to use a Grove connector instead of the Raspberry Pi GPIO. Though intended to fit nicely on a Raspberry Pi Zero the e-ink display works fine on the Raspberry Pi 4 and the other larger models.

With good visibility outside in bright sunlight and indoors, if you need to use a display that updates after intervals of 3 minutes or more then the Seeed Studio Triple Colour 2.13 e-ink display is a good option.

The Seeed Studio Triple Colour 2.13 e-ink display"s are available in Black and Red or Black Yellow which fit perfectly on the Raspberry Pi Zero"s they have available. There is also a 4 button 2.7 inch e-ink display for the larger Raspberry Pi"s 4,3 & 2.

Seeed is the IoT hardware enabler providing services over 10 years that empower makers to realize their projects and products. Seeed offers a wide array of hardware platforms and sensor modules ready to be integrated with existing IoT platforms and one-stop PCB production and cheap pcb assembly. Seeed Studio provides a wide selection of electronic parts including Arduino, Raspberry Pi and many different development board platforms. Especially the Grove Sytsem help engineers and makers to avoid jumper wires problems. Seeed Studio has developed more than 280 Grove modules covering a wide range of applications that can fulfill a variety of needs.

some jokes (dark jokes preferably, because I"m a horrible human being) displayed from JokeApi. I basically copied the example script and started from there.

This resistive LCD screen has been designed specifically to connect to your Raspberry Pi, regardless of the model you use. It connects directly to the GPIO pins of the microcontroller, and it has embedded drivers allowing you to work easily with Raspbian and Ubuntu systems. The screen has a 320 x 480 pixel resolution and will capture images in 17 different modes with a simple tap.

Dimensions, software resources, technical schematic – you’ll find everything you need to know about the WaveShare 4” LCD Screen for Raspberry Pi right here!

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Grove - 16X2 LCD RGB Backlight is a full-color backlight 16x2 LCD display for Arduino. High contrast and ease of use make it a perfect I2C LCD display for Arduino and Raspberry Pi.

The traditional 16x2 LCD requires up to 10 I/O pins to display, and the 16x2 LCD with RGB backlight requires an extra 3 pins to control the backlight color. This will take up a lot of I/O pins on the main control board, especially for development boards with less I/O resources such as Arduino and Raspberry Pi. Grove - LCD RGB Backlight makes it totally different! With the help of Grove I2C connector, only 2 signal pins and 2 power pins are needed. You don"t even need to care about how to connect these pins. Just plug it into the I2C interface on Seeeduino or Arduino/Raspberry Pi+baseshield via the Grove cable. No complicated wiring, no soldering, no need to worry about burning the LCD caused by the wrong current limiting resistor. Easy peasy.

What"s more, this LCD module is not only a character LCD but also can display your DIY images, such as a heart and a smiling face. 16x2 means two lines and each line has 16 columns, 32 characters in total. Each character contains 5*8 pixels.

The GrovePi+ Connect from Seeed Studio gives your Pi project access to more then 70 add-on modules from the Grove range. The modules encapsulate a single function such as a light sensor or an LCD display and simply plug into the GrovePi+. The Grove range includes both simple sensors such as light, sound and temperature, and complex sensors including gas and alcohol, motion related modules like motors, controllers and accelerometers, displays including OLED and LCD, and the list goes on. The great thing about Grove is that you can easily extent your project with a new sensor or actuator, or you can easily remove everything and start agin on a new project. Grove wiring is much neater than breadboarding and with far less opportunity for wiring things backwards or short circuited.

Seeed provide technical documentation, example projects and software libraries on their product pages. if you require this information please visit this product"s page.

The Grove Base Kit for Raspberry Pi is one of the best kits for beginners to get started with Raspberry Pi. No troublesome soldering and no complicated wiring. You can focus on learning Raspberry Pi. This kit includes a Grove Base Hat for Raspberry Pi and 10 Grove modules, which covering sensor, actuator and display. All you need to do is following the demo, plug the module into the Grove Base Hat, truly plug and play.