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Nodered not connecting to local emoncms

I am trying to connect from nodered running on a Raspberry Pi to my emonpi (so another pi) running low-write 10.2.6.
I installed the emoncms in node.
Base url: tried the ip of the emonpi and ip/emoncms

However it does not seem to connect: a debug node shows nothing
Any ide what i am doning wrong?