Table of Contents
Console cable
ADM5120 routers has a serial/console port. On the PCB of the router there is a 8 pin connector called jp2. Here are the pins located for a serial console port (115 kBaud, 8 databits, no parity, 1 stopbit)
jp2 2-o o o o-8 1-o o o o-7 1 - Rx 2 - +3.3V 3 - nc (hardware hack by ZFT Lab.: connect to pin #131 ADM5120 - Rx second UART) 4 - nc 5 - nc (hardware hack by ZFT Lab.: connect to pin #130 ADM5120 - Tx second UART) 6 - nc 7 - Tx 8 - Gnd
Read more about connecting the second uart.
Edimax 7207Apg serial console (pins must be soldered) 115200 8N1
o o o|o J3
J2
J2
0 - Gnd
1 - Rx
2 - Tx
J3
0 - +3.3V
Be aware that the console port operates on 3.3 Volt and connecting to a PC serial port which uses 12 Volt will fry your router!!
There are 2 ways to solve this:
- Build a serial cable using a MAX232 line driver to reduce the voltage. This was used in the early days of gsm cell phones to build your own data cable. These phones also operates on 3.3 volt serial signals.
- Buy a serial data cable for a gsm cell phone, figure out the Rx and Tx signals and solder this cable directly to jp2. I used a serial data cable for the Siemens x25,35,45 phones and connected it to jp2.
© RocketMan
Cables
max232
Read more about connecting the second uart.
74hc
Simple, but not recommended!
siemens data cable (C35, S35, etc.)
If your cable has four wires, it has GND, TX, RX, and +3.3V output from battery. GND (usually black) is soldered to pin 1 on Siemens system connector. The rest is as follows ...
| siemens | JP2 pin | |
|---|---|---|
| 1 | GND | 8 |
| 4 | +3.3V | 2 |
| 5 | TX | 7 |
| 6 | RX | 1 |
links
- Modified Siemens cable: http://www.meshcube.org/meshwiki/ModifiedMobileSerCable
- MAX3232 schema: http://isl3893.sourceforge.net/serial-max3232.gif
- MAX3232 micro cable: http://www.kevinro.com/cable.pdf
