Implementation of Aqua Temp controlle

I’ve got esphome and a TTL-to-RS485 adaptor hooked up to the RS485 port on my EVO270-1. I’m currently mucking about with modbus, trying to talk to the heat pump controller as if I were the wifi dongle. Using the control panel I’ve set parameter H30 (Unit address) to 50, but I’m unable to talk to the controller via RS485. I put a logic analyser on the bus and could only see my transmissions, no response from the controller. I do see a blip to ground every 650ms or so.

I’ve tried with/without a termination resistor, with/without flow control, and a couple dozen other variations of wiring and baud rate, with no success. If I had one of the wifi controllers I could sniff the comms, but they ain’t cheap.

Can anyone advise if it is possible to have two logins. One for the app and one for the integration. I have setup two different logins but they both work only on the app.
If i dont login to the app i can use either on the integration.
Im sure i previously had this working perhaps something changed. Thanks for advice.

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I was also wondering this. Because if I use the app it seems ok, then in HA it will either stay or disappear. I was thinking it may not like multiple logins?

I suspect the hosting service is really poor. The login process and sharing confuses itself.