The base topic, as configured in the web GUI is prepended to all follwing topics.
General topics
Topic
R / W
Description
Value / Unit
dtu/ip
R
IP address of OpenDTU
IP address
dtu/hostname
R
Current hostname of the dtu (as set in web GUI)
dtu/rssi
R
WiFi network quality
db value
dtu/status
R
Indicates whether OpenDTU network is reachable
online / offline
dtu/temperature
R
Temperature of the ESP32
°C
dtu/uptime
R
Time in seconds since startup
seconds
dtu/heap/free
R
Available heap
Bytes
dtu/heap/size
R
Total heap size
Bytes
dtu/heap/minfree
R
Lowest level of free heap since boot
Bytes
dtu/heap/maxalloc
R
Largest block of heap that can be allocated at once
Bytes
Inverter total topics
Enabled inverter means, that only inverters with "Poll inverter data" enabled are considered.
Topic
R / W
Description
Value / Unit
ac/power
R
Sum of AC active power of all enabled inverters
W
ac/yieldtotal
R
Sum of energy converted to AC since reset watt hours of all enabled inverters
Kilo watt hours (kWh)
ac/yieldday
R
Sum of energy converted to AC per day in watt hours of all enabled inverters
Watt hours (Wh)
ac/is_valid
R
Indicator whether all enabled inverters where reachable
0 or 1
dc/power
R
Sum of DC power of all enabled inverters
Watt (W)
dc/irradiation
R
Produced power of all enabled inverter stripes with defined irradiation settings divided by sum of all enabled inverters irradiation
%
dc/is_valid
R
Indicator whether all enabled inverters where reachable
0 or 1
Inverter specific topics
serial will be replaced with the serial number of the inverter.
Topic
R / W
Description
Value / Unit
[serial]/name
R
Name of the inverter as configured in web GUI
[serial]/device/bootloaderversion
R
Bootloader version of the inverter
[serial]/device/fwbuildversion
R
Firmware version of the inverter
[serial]/device/fwbuilddatetime
R
Build date / time of inverter firmware
[serial]/device/hwpartnumber
R
Hardware part number of the inverter
[serial]/device/hwversion
R
Hardware version of the inverter
[serial]/radio/tx_request
R
Amount of sent packet requests
[serial]/radio/tx_re_request
R
Amount of sent fragment resend requests
[serial]/radio/rx_success
R
Amount of successfull received packets
[serial]/radio/rx_fail_nothing
R
Amount of failed packets, nothing was received
[serial]/radio/rx_fail_partial
R
Amount of failed packets, some fragments where missing
[serial]/radio/rx_fail_corrupt
R
Amount of failed packets, payload corrupt
[serial]/radio/rssi
R
RSSI of last received packet (Inverters with NRF24 module only support 2 states. > -64dBm and < -64dBm. In the first case -30 dBm is shown, in the second one -80 dBm)
dBm
[serial]/status/reachable
R
Indicates whether the inverter is reachable
0 or 1
[serial]/status/producing
R
Indicates whether the inverter is producing AC power
0 or 1
[serial]/status/last_update
R
Unix timestamp of last inverter statistics udpate
seconds since JAN 01 1970 (UTC)
AC channel / global specific topics
Topic
R / W
Description
Value / Unit
[serial]/0/current
R
AC current in ampere
Ampere (A)
[serial]/0/efficiency
R
Ratio AC Power over DC Power in percent
%
[serial]/0/frequency
R
AC frequency in hertz
Hertz (Hz)
[serial]/0/power
R
AC active power in watts
Watt (W)
[serial]/0/powerdc
R
DC power in watts
Watt (W)
[serial]/0/powerfactor
R
Power factor in percent
%
[serial]/0/reactivepower
R
AC reactive power in VAr
VAr
[serial]/0/temperature
R
Temperature of inverter in degree celsius
Degree Celsius (°C)
[serial]/0/voltage
R
AC voltage in volt
Volt (V)
[serial]/0/yieldday
R
Energy converted to AC per day in watt hours
Watt hours (Wh)
[serial]/0/yieldtotal
R
Energy converted to AC since reset watt hours
Kilo watt hours (kWh)
DC input channel topics
[1-4] represents the different inputs. The amount depends on the inverter model.
Topic
R / W
Description
Value / Unit
[serial]/[1-4]/current
R
DC current of specific input in ampere
Ampere (A)
[serial]/[1-4]/name
R
Name of the DC input channel as configured in web GUI
[serial]/[1-4]/irradiation
R
Ratio DC Power over set maximum power (in web GUI)
%
[serial]/[1-4]/power
R
DC power of specific input in watt
Watt (W)
[serial]/[1-4]/voltage
R
DC voltage of specific input in volt
Volt (V)
[serial]/[1-4]/yieldday
R
Energy converted to AC per day on specific input
Watt hours (Wh)
[serial]/[1-4]/yieldtotal
R
Energy converted to AC since reset on specific input
Kilo watt hours (kWh)
Inverter limit specific topics
cmd topics are used to set values. Status topics are updated from values set in the inverter.
Topic
R / W
Description
Value / Unit
[serial]/status/limit_relative
R
Current applied production limit of the inverter
% of total possible output
[serial]/status/limit_absolute
R
Current applied production limit of the inverter
Watt (W)
[serial]/cmd/limit_persistent_relative
W
Set the inverter limit as a percentage of total production capability. The value will survive the night without power. The updated value will show up in the web GUI and limit_relative topic immediatly.
%
[serial]/cmd/limit_persistent_absolute
W
Set the inverter limit as a absolute value. The value will survive the night without power. The updated value will set immediatly within the inverter but show up in the web GUI and limit_relative topic after around 4 minutes. If you are using a already known inverter (known Hardware ID), the updated value will show up within a few seconds.
Watt (W)
[serial]/cmd/limit_nonpersistent_relative
W
Set the inverter limit as a percentage of total production capability. The value will reset to the last persistent value at night without power. The updated value will show up in the web GUI and limit_relative topic immediatly. The value must be published non-retained, otherwise it will be ignored!
%
[serial]/cmd/limit_nonpersistent_absolute
W
Set the inverter limit as a absolute value. The value will reset to the last persistent value at night without power. The updated value will set immediatly within the inverter but show up in the web GUI and limit_relative topic after around 4 minutes. If you are using a already known inverter (known Hardware ID), the updated value will show up within a few seconds. The value must be published non-retained, otherwise it will be ignored!