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serial settings otg version 1 b

PostPosted: Sat Oct 07, 2017 12:04 pm
by labium
i unpacked my assembled opentherm gateway ordered in 2012 , i cant get serial communication. . i use a digi port server ts4 with rj45 pin 4 to db9 pin 2 (red wire) pin 5 to pin 3 db9 ground (black) to chassis db9

digi ts4 port settings otg.PNG
digi serial port settings
digi ts4 port settings otg.PNG (16.47 KiB) Viewed 2715 times



db9torj45 otg (Mobile).jpg
db9torj45 otg (Mobile).jpg (59.18 KiB) Viewed 2714 times

Re: serial settings otg version 1 b

PostPosted: Sat Oct 07, 2017 12:12 pm
by hvxl
The db9 chassis is not connected to anything. You have to connect ground to db9 pin 5.

Re: serial settings otg version 1 b

PostPosted: Sat Oct 07, 2017 12:32 pm
by labium
i used this diagram

digi rj45 to db9 serial.PNG
voor de vertaling van db9 naar rj45
digi rj45 to db9 serial.PNG (97.78 KiB) Viewed 2708 times


kleurcodering draden db9 rj45 converter.PNG
voor de betekenis van de kleuren van de draden
kleurcodering draden db9 rj45 converter.PNG (9.49 KiB) Viewed 2707 times

Re: serial settings otg version 1 b

PostPosted: Sat Oct 07, 2017 12:43 pm
by hvxl
So then connect rj45 pin 6 (SG, signal ground) to db9 pin 5.

Re: serial settings otg version 1 b

PostPosted: Sat Oct 07, 2017 12:54 pm
by hvxl
I also believe you have the red and green wire the wrong way around. If I understand the pictures correctly, red is TxD from the digi port server. That should be connected to RxD of the OTGW, which is db9 pin 3. Green is RxD on the digi port server. That must be connected to TxD of the OTGW, db9 pin 2.

Re: serial settings otg version 1 b

PostPosted: Sat Oct 07, 2017 5:26 pm
by labium
hvxl you are correct changing the red and green wire works with th yellow rj45 pin 6 wire in the db9 pin 5.

thanks