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.