Getting data from inverters via an RS485 connection

Applications
161

Works ok on it’s own, I mean it also works ok when both are connected.
The issue is that the inverter’s wifi logger is acting up when both are connected :frowning:

162

What do you have connected to the USB side of the RS-485 adapter?

163

Connected to my windows 10 laptop and also to the raspberry pi4 that runs Home Assistant, same happens on either.

164

Have you tried running it with the USB side not connected to anything?
It sounds like something from the USB side is getting fed to the RS-485 side.

165

You mean the USB rs485 connected to the wifi logger but not connected to anything on the other end (i.e. unplugged from the pi)? Well then nothing happens since only the official logger is active?

166

Yes. i.e. the RS-485 side of the interface is connected, but nothing is attached to the USB
connector.

What is producing the graphs?

167

When I have both RS485 adapter and wifi logger connected and both are receiving data - the bogus data happens.
When I have both connected but I am not reading any data from the RS485 adapter the bogus data does not get logged from the wifi logger.

168

OK. Got it.

What controls the queries that are going to the wi-fi logger. i.e. where are they coming from?

169

That controls itself once configured, I plug it into the inverter, set up the wifi on the logger to connect to my home network and then it automatically sends data to the cloud every 1 minute.
I can’t see what it is doing.

170

No way to control it? No web interface via the inverter, etc?

171

It does but absolutely nothing useful or that can be set more or less:

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172

Nothing on the advanced page?
You were posting your pic while I was typing. :wink:

173

I did find this hidden config, not sure if anything is helpful:

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No idea what the modes mean:
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174

AP and STA usually refer to wi-fi Access Point and STAtion modes of operation.
WRT Transparency, I have no idea what they’re referring to.

175

How often are you polling the RS-485/USB interface?

176

I had 3 sensors, one every 15 secs and two every 60 secs.

177

Are those devices all connected to the same USBus?

178

They are virtual sensors in Home Assistant which get created like so:

modbus:
  - name: hub1
    type: serial
    baudrate: 9600
    bytesize: 8
    method: rtu
    parity: N
    port: /dev/ttyUSB0
    stopbits: 1
    sensors:
      - name: InverterTemp
        slave: 1
        address: 33093
        unit_of_measurement: °C
        input_type: input
        count: 1
        precision: 1
        scale: 0.1
        scan_interval: 60
      - name: GenerationToday
        slave: 1
        address: 33035
        unit_of_measurement: kW
        input_type: input
        count: 1
        precision: 1
        scale: 0.1
        scan_interval: 60
      - name: HouseLoad
        slave: 1
        address: 33147
        unit_of_measurement: W
        input_type: input
        count: 1        
        scan_interval: 15

So HA sends read register commands to the inverter via the usb rs485 adapter

179

Almost sounds like HA is “stepping on” the datalogger.

180

Yes that is what I think since on their own they both operate correctly. Question is why?
No idea how @craigcurtin managed to get it working, he is doing the exact same thing as I am with the same type of inverter and wifi logger.
Maybe the usb rs485 adapter matters also, who knows.