这是一个具有摄像功能的Wi-Fi无线遥控小车，设计独特，它使用了一个无线路由器，无需外加微控制器亦可以通过电机驱动器进行遥控小车。

Due to the limited GPIO availability on the wireless router, you may want use the router LED pin to provides a few more GPIOs. This describes how to use the LED pin on a wireless router as binary outputs. 

This is a Wi-Fi controlled remote control car with camera that can be driven over the internet. The RC car is very unique since it's using a wireless router and eliminate the need of a microcontroller.

This is a motor library for Lua running on wireless router which flashed with OpenWrt firmware. It allows a wireless router control the motors without using micro-controller. This library works on any dual-full-bridge driver such as L298.

Each motor require two GPIOs for controlling, therefore 2 motors will use up 4 GPIOs. Most of the wireless router may not have enough GPIO to control the motors, but you can use other pin on the router such as the LED pin, this require to unload the leds_gpio module.

To compile OpenWrt from source, you need a computer running Linux such as Ubuntu. If you are like me and don't have a Linux computer, you can still use your Windows computer to compile OpenWrt.

In order to run Linux on a Windows, you must install virtual machine on you computer. Virtual machines allow you to run any operating system in a window on your desktop, I'm using the free VirtualBox for my case, please read here for details.

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.

This is a very simple GPIO read/write functions for Lua running on linux-based embedded system, it is based on Arduino digital input/output syntax.

Only four functions are available: pinMode, digitalWrite, digitalRead & delay

Update: Added pin_direction_status() function on 16 Oct 2015

Insert 3G dongle and restart router.

Append to following line to /etc/config/network configuration file. Here is the settings for setup Maxis 3G network.

Restart the router.

In my projects I needed a tool to monitor data in real time, the data is captured by a microcontroller and uploaded to the web using a wireless router. Initially I was trying to use yeelink since it is in chinese langguage and yet I'm a Malaysian Chinese.

One month ago, I have tried with Ubidots, there were a few things that caught my eye.

This guide is to provide detailed information on how install BASH Dropbox Uploader to a wireless router flashed with OpenWRT. Dropbox Uploader is a BASH script written by Andred Fabriz that allows you to upload, download, delete files (and more) from Dropbox.

If your TL-MR3020 router is bricked with the following symptoms, most likely you can use this method to recover it.

1. Ping the router without problem
2. Telnet connection failed
3. SSH connection failed

Solution:

1. Put the router switch to AP mode
2. Turn on the router power
3. Push and hold the "WPS" button
4. When the WPS Led flash slowly, switch on AP mode to 3G mode. The LED should flash quicky.

Now, you can Telnet to router

Erase the root data

Login to the router via telnet and enter the following command. Most likely your router is now recovered. 

Continue following procedures if it is still not working.

Copy firmware to router

• Login to router via telnet and change the password in order to enable SSH

• Copy the OpenWRT firmware to the router /tmp folder. I personally like and use WinSCP.

Upload the firmware to router

SSH to router and write the firmware to router. Where code.bin is your OpenWRT firmware file. 

Reboot the router and your router should be working now. If all the above methods is not working for you, then you should go for Serial Console method to recover the bricked router.

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.

I own a TP-Link TL-WR1043 V2.1 wireless router, I would like to test if it is able to run on OpenWRT or DD-WRT. it is first tested on OpenWRT, DD-WRT later, so far it has been working flawlessly for me.

About TP-Link TL-WR1043 V2.1 Wireless Router
TP-Link TL-WR1043 V2.1 is a 300Mbps Wireless N Gigabit Router, it has more memory (64MB) compared with the TL-WR1043 V1.x. Here is the comparison: