Project:
EQDirect cable, EQ6, HEQ5 mounts

Contents:

1. EQDirect 9 pin D-sub cable
2. Adapter 9 pin D-sub to RJ45
3. EQDirect RJ45 cable
4. Wireless control of EQ6, HEQ5 mounts
5. To be continued

Note:
I take no responsibility or liability for what are written here, you use the information on your own risk!

2: Adapter 9 pin D-sub to RJ45

This is the connector that is different from the EQ6 mount. It's a telephone / internet plug, a RJ45 eight pin connector. The EQ6 mount has a 9-pol D-sub connector.

I followed this instruction how to connect the cable:

• http://eq-mod.sourceforge.net/ eqdirect2.htm

I had one RJ45 cable with a broken contact in one end. I can use the working end of it and connect to the EQDIRECT cable I already have but with wrong contact, the 9-pol D-sub which EQ6 mount use.

First I check that the plug on the cable is mechanically correct.

The network cable is a bit stiff and I cut it short.

I take the D-sub 9 pin connector from the old EQDIRECT cable with faked chip I already have. At least I got some use of it.

I open the enclosure, there are only three wires in there:
Green wire, RX connected to pin 6.
White wire, TX connected to pin 9.
Black wire, it's the common ground connected to pin 4 and 5.
RX is the receiver and TX is the transmitter cable.

According to the instructions above I should have a 12 Volt wire also, but there is no one here. I don't see what need it can be of it either. The FTDI chip take the 5-volt power from the USB connector.

The pin layout of 9-pol D-sub:

• https://www.virtual-serial-port.org/ article/ what-is-serial-port/ rs232-pinout/

Note:
The function of each pin is different in this case.

Soldered together and I can do a test, and yes it worked.