I want to built a wifi car without using micro contoller, due to the limited GPIO availability on the wireless router, a 74HC595 Shift Register is needed to expand its outputs.
This is a 74HC595 Shift Register library for Lua running on wireless router flashed with OpenWRT, it may run in any linux-based embedded system. It can be used to shift out data from either the most (i.e. the leftmost) or least (rightmost) significant bit.
The TP-Link TL-MR3020 N150 3G/4G Travel Router is a very small device with a size of 74mm x 67mm x 22mm, it has only 4MB flash and 32MB memory. The router have about 428KB (67%) space available after installing OpenWRT Barrier Breaker 14.07, you may encounter shortage of storage when installing certain extensions due to limited of router space.
By employing OpenWrt's extroot, you can expand the storage capacity of your root file system using the additional space of an added storage device.
This project provides step by step approach to driving a Dot Matrix Display (DMD) Panel with an Arduino. The DMD is a 512 pixels single colour LED display arranged in 32x16 layout, a 16 pin (2x8) IDC connector is used to interface with Arduino.
In order to drive the 32x16 Dot Matrix Display Panel from Arduino, the DMD library for Arduino is required. You can download it from Freetronics GitHub.
The Freetronics DMD library is able to write letter and text on the display board with limited function, variable string and text centering is not supported. Yeah! now you can use my code to write variable string on the display board and centering it horizontally.
Updated: DMD2 library is released, this library is currently in BETA release.