I connected the RS-232 modules directly togeteher. At first I only connected 3 wires (without hardware handshake) and this didn't work. Only after connecting the extra 2 wires for the hardware handshake then only did the system work.
Tuesday 26.08.2003
Now I replaced the RS-232 modules with RS-485 ones. The system couldn't work.
Wednesday 27.08.2003
I continued trying to make the system work with RS-485, but after two days of trying I stopped there. RS-485 isn't the real focus of this task. The focus is to make the system communicate via modems.
Thursday 28.08.2003
I reverted the system back to using RS-232 modules. Now I introduced the Westermo TD-23 DC modems. This system didn't work. I decided that I should focus my development on Phoenix Cotact's modems since they are ideally being marketed together.
Friday 29.08.2003
I received the Phoenix Contact modems. I fixed up the modems into the system. Due to transportation arrangements I left the office at 13:00. In the evening I went to Bochum & slept overnight there.
Saturday 30.08.2003
With those 2 MTE students and my partner, our group of 4 went to Amsterdam.
Sunday 31.08.2003
On this day we returned from Amsterdam and settled down to prepare for the following week.