IoT e-ink screen

Introduction: An IoT e-ink screen equipped with temperature and humidity sensor and charge and discharge management

1. Product introduction:

This product is an IoT e-ink display driver board that supports both WIFI/Bluetooth networking protocols and has an onboard charge and discharge management circuit. Support lithium battery power supply. Designed with a high-precision temperature and humidity sensor, it can collect the current environmental temperature and humidity in real time. It can achieve low power consumption and long-lasting information display, and can be flexibly used in many projects.


2. Application scenarios:

This product can be used in electronic price tags, and can also be used as a digital low-power temperature and humidity sensor, a networked information parameter display, etc. It can be used in shopping malls, homes, schools and other places.


3. Product overview:

This product uses ESP32C3 as the main control, supports Bluetooth WIFI communication, and supports low-power sleep mode. TP4056 is selected as the charging chip. The power circuit is designed to support external power supply and automatic battery switching. It supports 5W power charging and can monitor the battery voltage. SHT30 high-precision temperature and humidity sensor is selected to realize functions such as temperature reporting and direct display. The onboard low-power control circuit can disconnect the power supply of all peripherals in sleep mode and has a long battery life.


4. Product parameters:

Finished product size: 74mm*36.3mm Board thickness 1.6mm
Input parameters: 5V-1A TypeC interface
battery parameters: 4.2V 800mAh Battery
life: 20 days (data reporting interval: 2h, screen refresh time: 5min)
Support ink Screen interface: 40P SPI interface
Charging time: 40 minutes


5. Instructions for use/tutorial:

The functions of each interface of this product are as follows:


After the user completes the soldering of the product PCB and checks that there is no virtual soldering short circuit status, the board can be directly connected to the USB port through the TypeC data cable Use the computer USB port to download the software and burn the program (no external downloader is required). After the burning is completed, install the ink screen and the battery can be used.

Production and assembly tutorial:

This module is a single-sided layout device that can be welded using SMT. After assembling the e-ink screen and battery, it can be used normally after being installed into the casing.


6. Remarks:

The total BOM cost of this product is about 80 yuan.
This product is hardware + software. For detailed documents, please see the attached IoT ink screen firmware bin >>>>
This product can be burned using Espressif’s official flash_download_tool program. No external downloader is needed. Use a data cable to connect to the PC to automatically identify the internal USB- CDC, select the bin file through the software to burn.
This product is designed with a shell file, which can be produced directly through 3D printing. Detailed files can be found in the attachment IoT Ink Screen Shell >>>> The
electronic ink screen and battery selection of this product can be found in the attachment IoT Ink Screen Accessory Selection >>>>


7 .Test photos/video:

The following video shows the refresh process of the product ink screen in global refresh (two-color) mode: