Hi all,
i’m replacing a broken ilon e3 with home-assistant. I need to read (and after write but it’s another story… ) some data via a serial rs485/modbus.
I connect to raspberry via a usb/serial converter that raspberry saw as ttyUSB0
I set this config but i have no reply message
2018-05-28 09:05:00 ERROR (SyncWorker_8) [homeassistant.components.sensor.modbus] No response from modbus slave 2, register 512
modbus:
type: serial
method: rtu
port: /dev/ttyUSB0
baudrate: 9600
stopbits: 1
bytesize: 8
parity: N
sensor:
platform: modbus
registers:
- name: Sensor1
unit_of_measurement: °C
slave: 2
register: 512
count: 2
Tonight i will check cables!!!
I upload some printscreen about how it was set on ilon
Thanks
is it correct?
ok , i made some step ahead!!!
I’m able to read the value and display to HA with code:
- name: Sensor3
unit_of_measurement: °C
slave: 4
register: 514
count: 1
The problem is that value that i receive is a value without comma (for example i see 215 that mean 21.5 °C) so i change the code to
- name: Sensor3
unit_of_measurement: °C
slave: 4
register: 514
count: 1
scale: 0.1
data_type: float
but the result is that I have 0 as result instead 21.5
If I remove data_type i see 21 without the value after comma
Where is the error?
Thanks
ok, found the error too
- name: Sensor3
unit_of_measurement: °C
slave: 4
register: 514
count: 1
precision: 1
scale: 0.1
Next question is:
I have a digital value that is 1 if a pump is runnig, 0 if not. Is it possible to display ON or OFF instead 1/0 ?
Use Modbus Binary Sensor instead of Modbus Sensor:
Or maybe not!
I haven’t used these and just figured it would be like other components that have both sensor and binary_sensor options.
If that doesn’t work for you then you could make a Template Binary Sensor out of your Modbus Sensor:
no luck with binary, it report always OFF
Could you expand on that? E.g., what does the configuration for this sensor (that shows 1 & 0) look like, and what binary configuration did you try?
If you have a sensor (any sensor) whose state is always shown as 1 or 0, you can make a binary sensor from it by doing something like this:
binary_sensor:
- platform: template
sensors:
bin_sens:
value_template: "{{ is_state('sensor.zero_one_sens', '1') }}"
So if sensor.zero_one_sens is showing 1, then binary_sensor.bin_sens willl show on, and if sensor.zero_one_sens is showing 0, then binary_sensor.bin_sens will show off.
thanks,
i resolve the issue using template as you suggest (I stayed on sensor instead binary_sensor but it’s the same), and now it works like a charm
sensor:
- platform: template
sensors:
#PDC
compressorepdc2:
friendly_name: "Compressore"
value_template: >-
{% if is_state('sensor.compressorepdc', '1') %}
ON
{% else %}
OFF
{% endif %}
icon_template: >-
{% if is_state('sensor.compressorepdc', '1') %}
mdi:power-plug
{% else %}
mdi:power-plug-off
{% endif %}
I’m using RTUoverTCP (modbus component) and I have some problem with reading data.
In general when HA try to read temperature is not able to do that, but when I start reading temperature outside (external software) it gets right data. I have no idea what is happening 
To check if I made all OK I have made switch. And with switch I do not have any problem. I can On/Off without any problems. So looks connection is OK.
Below is my code:
modbus:
name: RS485
type: rtuovertcp
host: 192.168.0.7
port: 1234
switch:
platform: modbus
registers:
- name: Switch2
hub: RS485
slave: 1
register: 0
command_on: 1
command_off: 0
sensor:
platform: modbus
scan_interval: 30
registers:
- name: CzujnikTest
hub: RS485
slave: 1
register: 1
unit_of_measurement: °C
count: 1
precision: 1
scale: 0.1
offset: 0
data_type: integer
Did you ever got this solved?
I’m having a similar situation, the documentation for me is too confusing.
