Serial Console Forwarding over wifi

Question

I am using a TTL to USB cable with my Raspberry Pi and I would like to forward that UART signal over the internet, or just over my own network via a usb to wifi chip of some sort. How would I go about doing this? What port would it be over? How would I access it via Macbook?

Yes, I am aware of ssh this is for debugging when my Pi does not boot far enough to turn on wifi.

Originally posted on Hardware Recommendations

Answer 1

There are some hardware modules available that provide access to a UART (TTL, RS-232, etc.) via a wired or wireless (802.11) TCP/IP connection. For example:

• http://en.usr.cn/low-price-low-power-ttl-to-wifi-802.11b-g-n-module.html
• http://en.usr.cn/Wifi-Serial-Server/rs232-to-Wifi.html
• https://www.sparkfun.com/products/11049

Answer 2

One way would be to use a second RPi, like @bobstro suggested in the comment. This second RPi should be able to accept network connections, e.g. SSH, and provide access to the UART of the target RPi you want to debug.

Another (cheaper) alternative is to look into projects aiming at flashing Arduinos over the air. Many of these implement a UART-to-Wifi gateway on very cheap hardware like ESP8266. Example.