Problem with connection?

[jfornander]

I have a Mitsubishi Electric LN35 HERO and I have connected an ESP8266 to the pump. Used the "full configuration" and the ESP is connected but not without problem. I can turn on the pump and choose different modes but the current temperature is N/A (-1 in HA). Changes like temperature/fan speed seems to work (pump is changing) but all of a sudden the ESP displays "OFF" and the pump goes back to some "start state". Log is displaying:

21:08:16 | [W] | [CN105:092] | could not write as asked, because UART is not connected
21:08:16 | [I] | [CN105:008] | setupUART() with baudrate 2400
21:08:16 | [W] | [CN105:094] | delaying packet writing because we need to reconnect first...
21:08:16 | [I] | [CN105:386] | --> Heatpump did reply: connection success! <--
21:08:25 | [W] | [CN105:009] | Cycle timeout, reseting cycle...
21:08:25 | [I] | [CYCLE:052] | 6: Cycle ended in 9.0 seconds (with timeout?: YES)
21:08:29 | [I] | [CYCLE:039] | 1: Cycle start

IIt seems like the pump/ESP is disconnecting frequently? Don’t know where to start, anybody?

[echavet]

Could you look at your device diagnostic sensors in the esphome integration page and make a screen shot ?

[echavet]

You can also screen the uptime connection sensor graph (going to historical view)
This graph should be linear and continuous.

Mine is continuous which means no connection loss.

[jfornander]

This is what my diagnostic looks like last 3h. Started the pump via the esp 3h ago and it crashed that's why all the numbers got reset.

My uptime looks like that, it crashes when I try to send commands

[echavet]

It looks like your unit does not reply to the esp requests.
Do you have any state information on the home assistant ui component ? Like temperature, mode...
Because you have 0% of complete cycle.
I'm surprised you esp manage to get any connection response.
So either it is a bug, or your uart connection is unstable.
You should double check the wires or test with a power regulator. There are threads on this project that deal with such regulators.
You could also test with an esp32 which uart is far more reliable

[jfornander]

I switched to an ESP32 ad now it is working, thanks