In my previous post I’ve described how to access the serial port of a Fonera 2100 by using a Raspberry Pi with minicom. Being able to access the serial port makes it very easy to flash DD-WRT on the Fonera because according to these instructions we can skip to Step 6.
Following these instructions I’ve flashed my Fonera with DD-WRT v24 (05/20/08) std – build 9517M.
Then, I have put my DD-WRT-Fonera in Client Bridge mode following these instructions. I’ve also enabled SSH, so I can login over the network.
The interesting part is that the fonera has some free GPIO pins, that can be controlled by software. For example:
set GPIO3 to output : echo 1 > /proc/gpio/3_dir GPIO3 = on (3.3V) : echo 1 > /proc/gpio/3_out GPIO3 = off : echo 0 > /proc/gpio/3_out set GPIO4 to output : echo 1 > /proc/gpio/4_dir GPIO3 = on (3.3V) : echo 1 > /proc/gpio/4_out GPIO3 = off : echo 0 > /proc/gpio/4_out set GPIO1 to output : echo 1 > /proc/gpio/1_dir GPIO3 = on (3.3V) : echo 1 > /proc/gpio/1_out GPIO3 = off : echo 0 > /proc/gpio/1_out set GPIO7 to output : echo 1 > /proc/gpio/7_dir GPIO3 = on (3.3V) : echo 1 > /proc/gpio/7_out GPIO3 = off : echo 0 > /proc/gpio/7_out
Although the voltage output of the Fonera GPIO’s is 3.3V this works very well.