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.
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 may be late to the party, but would like to enquire if someone could please assist me.
I have a generic china heatpump, with s Chiller-300 controller, which also has RS485. Has someone maybe been able to hack the modbus of this Chiller-300 controller?
It is paired with the AquaTemp WiFi module (white plug 3-pin) however, I cannot seem to get it working correctly, constantly have the flashing RS485 communication error light.
Next best idea was to go direct and use modbus and a Pi to control the unit.
I’m not sure if anyone has seen this but someone else is doing Modbus on a heat pump via node red and a small RS485 to ethernet controller - no aquatemp controller if I read it correctly.
I was looking at it and thinking I could maybe wire the ethernet controller the same way and then trying via home assistant modbus integration from that point. I’ve not got time to play around with it now, but posting this here in-case it helps move anyone else forward in the mean-time.