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
serial settings otg version 1 b
Moderator: hvxl
Re: serial settings otg version 1 b
The db9 chassis is not connected to anything. You have to connect ground to db9 pin 5.
Schelte
Re: serial settings otg version 1 b
i used this diagram
Re: serial settings otg version 1 b
So then connect rj45 pin 6 (SG, signal ground) to db9 pin 5.
Schelte
Re: serial settings otg version 1 b
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.
Schelte
Re: serial settings otg version 1 b
hvxl you are correct changing the red and green wire works with th yellow rj45 pin 6 wire in the db9 pin 5.
thanks
thanks