huawei_solar.huawei_solar.ReadException: could not read register value, is an other device already connected? about huawei_solar HOT 3 CLOSED

: As I already said to you in #3 <#3>: The inverter closes the connection instead of answering the query after issuing a read_register (0x03) command, so having an open 502 port to connect to is clearly not enough. The device will always close the previous connection when another connection is made to that 502 modbus port. So make sure that nothing else is trying to connect to the inverter via Modbus. This can also cause the behavior that you're seeing. To debug, you should verify that you can succesfully retrieve a value via Modbus from the inverter. I've only worked with Modbus directly via Python. A minimal example to debug: from pymodbus.client.sync import ModbusTcpClient as ModbusClient client = ModbusClient('<ip>', port=502) client.connect() client.read_holding_register(address=30000, count=15 ,unit=0) If you want to use a GUI to query, you'll have to search for yourself (maybe http://www.minaandrawos.com/tcp-modbus-examiner-tool/ works for you?) — Reply to this email directly, view it on GitHub <#13 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AWXEGKJKCMKVKFE7MFFVMWTUU4N3RANCNFSM5LO2UNFA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you authored the thread.Message ID: ***@***.***>