1. Onboard ESP32, support for development 2. Provide an Android mobile phone APP program, which can update the display content through Bluetooth , which is convenient to use 3. Provide an HTML program, which can remotely update the display content through a web page, and is convenient to integrate into various network applications 4. Use the Floyd- dithering algorithm to obtain more color combinations and shadow rendering on the original image 5. Support a of commonly used image formats (BMP, JPEG, GIF, PNG, etc.) Product parameters: Product name: Electronic ink screen wireless network driver board Material: PCB+metal WiFi standard: 802.11b/g Bluetooth standard: Bluetooth 4.2, including traditional Bluetooth (BR/) and low energy Bluetooth (BLE) Communication interface: 3- wire SPI, 4 wire SPI (default) Working voltage: 5V Working current: 50mA~150mA Low power consumption current: Less than 2mA (turn off CP2102 power supply) : Ink screen wifi driver board This product is used with ink screens and is suitable for application scenarios of wireless image scanning: such as supermarket electronic price tags, electronic business cards, serial port information display boards, etc. Product size: 48.25x29.46mm color:blue Package Contents: 1x e-paper ESP32 Driver Board 1x e-paper Adapter 1x 24PIN FFC line Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.