Gathering data from different sensors

ChrisKolan · June 24, 2021, 9:19am

It appears that refreshing the serial sensor is a known problem:

github.com/home-assistant/core

readline() will not read serial data without newline ending

opened 08:23PM - 17 Apr 21 UTC

closed 08:04PM - 29 Sep 21 UTC

jensjakob

integration: serial stale

### The problem The main problem is that the readline() function can't handle s…erial data without a line ending. readline() is used here: https://github.com/home-assistant/core/blame/dev/homeassistant/components/serial/sensor.py#L192 This has been a problem that a user found in 2018: https://community.home-assistant.io/t/using-serial-sensor-for-reading-json-output-from-arduino/50798/10 I'm trying to connect a Victron BMV 712 battery monitor who sends data in this format: > The device transmits blocks of data at 1 second intervals. Each field is sent using the following > format: > <Newline><Field-Label><Tab><Field-Value> > > The identifiers are defined as follows: > <Newline> A carriage return followed by a line feed (0x0D, 0x0A). > <Field-Label> An arbitrary length label that identifies the field. Where applicable, this will > be the same as the label that is used on the LCD. > <Tab> A horizontal tab (0x09). > <Field-Value> The ASCII formatted value of this field. The number of characters > transmitted depends on the magnitude and sign of the value. Unfortunately I can't edit the way they send their data. The data is correctly received when using Raspberry Pi OS with minicom, so it shouldn't be a problem with the connection. The log actually says "Serial device /dev/ttyAMA0 connected", so I guess I found the real problem. ### What is version of Home Assistant Core has the issue? core-2021.4.3 ### What was the last working version of Home Assistant Core? _No response_ ### What type of installation are you running? Home Assistant OS ### Integration causing the issue serial ### Link to integration documentation on our website https://www.home-assistant.io/integrations/serial/ ### Example YAML snippet _No response_ ### Anything in the logs that might be useful for us? ```txt 2021-04-17 21:38:03 INFO (MainThread) [homeassistant.components.serial.sensor] Serial device /dev/ttyAMA0 connected ...then nothing more is shown. "Received: %s" is expected. ``` ### Additional information _No response_