Need some time to review Release 1.1. Some new things are coming along, just have a quick preview here.
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There is actually not any existing PCB on the market this days where you get Epaper controller plus touch for cheap SPI epapers. There are of course epaper controllers with touch but for ready-made products with parallel epapers such as Kindle and any other e-book reader. But what if you want to make a simple UX using a small SPI epaper?
This board gives an answer to this question and opens a new way to explore that possibility. This ESP32-C3 controller board includes in a single PCB the existing SPI adapter for 24 pin epapers and an additional I2C connector for touch. Based on my already working PCB to have a small footprint SPI driver and Tinypico HAT this new project has the size to be used in a home swich. But of course it's not limited to be used in a home switch but in any other project where you would like to try making easy and straight-forward UX. It has connectors ready to drive a 2.7 inch E-Ink Screen Display 264x176 epaper display. There is a new model that has touch and I can include it in this package optionally (Check product options)
OPTIONALLY: You can get the 3D-printed switch case in PETG that you can see in last product pictures for free (White) just send me a message after buying the product.
What it does not have and is not planned to be included is Battery charging circuit since the idea it was to be used as a switch or industrial device where is always connected to a power source.
What it does not deliver in Revision 1.0 but is coming in release 1.1
It can be programmed connecting it directly to USB. And it can be powered either by USB or by 3.3V directly. It was designed to be used in home appliances more specifically in a switch to have a smart-home actuator where you can place switches or do whatever you desire UX wise having an epaper which has a touch interface. But you don't want to charge a switch and a battery to it when there is power running all over the house. We will provide soon an extra PCB, that converts 220 AC to 3.3 DC, which has an additional Latch Relay on board.
Note that this what I'm offering here is an early release that has 3 hardware small fixes done in the top of the PCB:
Hence price is reduced about 50% in this PCB. All this will be hopefully gone in REV 1.1 that you can check here: https://github.com/martinberlin/H-spi-adapters/releases/tag/1.1
You can also find in that repository on the folder C3-27-epaper-touch all design files, schematics, and components.
# EPAPER SPI pins CONFIG_EINK_SPI_MOSI=0 CONFIG_EINK_SPI_CLK=6 CONFIG_EINK_SPI_CS=19 CONFIG_EINK_DC=18 CONFIG_EINK_RST=10 CONFIG_EINK_BUSY=7 # TOUCH I2C configuration CONFIG_TOUCH_SDA=5 CONFIG_TOUCH_SDL=4 CONFIG_TOUCH_INT=8
INT pin is pulled-up and HIGH by default the touch controller triggers it LOW when there is a touch event to read.
All electronic products are tested before being shipped. That means you can see connection marks or testing points without damaging the PCB. We pack them carefully with enough care to avoid any cracks and send them always with tracking and insured, so in case they loose the package we both recover the money to get the products again. Please note that spanish post only pays insurance if it's lost, not if it's broken, hence the carefully packed items is the most important step before shipping.