My son has a Freestyle Libre2 bloodsugar sensor, which has no direct integration into HA AFAIK. He shares his values with me. When he scans, I receive a notification on my phone.
Via the HA mobile app, it is possible to catch this message via the Last Notification which looks like this:
I was able to make an automation, in combination with an input_number helper, where the value is extracted from the state when the post time changes and the following requirements are fulfilled:
the state starts with the word âGlucosewaardeâ
attribute channel_id=default_channel
alias: "Get Freestyle BG value"
description: ""
trigger:
- platform: state
entity_id:
- sensor.telefoon_bart_last_notification
attribute: post_time
condition:
- condition: state
entity_id: sensor.telefoon_bart_last_notification
attribute: channel_id
state: default_channel
- condition: template
value_template: >-
{{ states.sensor.telefoon_bart_last_notification.state.split(':')[0] == "Glucosewaarde" }}
action:
- service: input_number.set_value
data:
value: >-
{% set value = states.sensor.telefoon_bart_last_notification.state %}
{% set pattern = '\d+.?\d+' %}
{{ (value | regex_findall_index(pattern)) if value is search(pattern) else null }}
target:
entity_id: input_number.bg
mode: single
This is in principle not a safe or elegant method, as the input_number can be changed/manipulated manually.
I would like to convert it into a template sensor , however I am getting stuck with setting the trigger and validating the conditions. Is this possible at all, and if yes, can you help me further?
- sensor:
- name: "Freestyle BG"
icon: mdi-water
unit_of_measurement: "mmol/l"
state_class: measurement
state: >-
{% set value = states.sensor.telefoon_bart_last_notification.state %}
{% set pattern = '\d+.?\d+' %}
{{ (value | regex_findall_index(pattern)) if value is search(pattern) else null }}
Difference with your example and my automation is that mine initiates on a change in post-date and then starts validating. Further, my sonâs app also generates other messages over other channels, hence I would be validating the channel_id as well to make sure I have the right message.
I am curious to understand whether that will also trigger in case two consecutive measurements would produce the same value.
Unfortunately it does not seem to work as expected/hoped for. My automation does consistently show latest values, but the sensor does not show measurements. I think indeed that no new trigger is generated in the case that there are two consecutive messages that are the like, e.g. âGlucosewaarde: 5.7 mmol/l ââ followed by âGlucosewaarde: 6.7 mmol/l ââ does not result in a trigger.
Fiddling in the templates shows that:
The regex statement {{ states('sensor.telefoon_bart_last_notification') | regex_findall('Glucosewaarde: \d+.?\d+ mmol/l' ) | count | bool }} does result in a true
The regex of the sensor does extract the value correctly.
The complexity may be that you need to fire a trigger in a AND like manner when:
the Last Notification changes AND
the Last Notification fulfills the format rule.
However, I donât know whether that is possible. A list of triggers is rather OR focused:
You are absolutely correct. I had not consider consecutive messages but I played around with it this morning⌠the following is working for me catching consecutive messages and skipping messages that donât meet the regex criteria. The only caveat is that Iâm testing using email-derived notifications since I can easily manipulate those YMMV .
- trigger:
- platform: state
entity_id:
- sensor.telefoon_bart_last_notification
not_to:
- unknown
- unavailable
sensor:
- name: "Freestyle BG"
icon: mdi-water
unit_of_measurement: "mmol/l"
state_class: measurement
state: >-
{% set current = this.state %}
{% set value = trigger.to_state.state %}
{% set pattern = '\d+.?\d+' %}
{% if not (value | regex_findall('Glucosewaarde: '~pattern~' mmol/l')
| count | bool) %}{{ current | default('-1.0') }}
{% else %}{{ value | regex_findall_index(pattern) }}{% endif %}
You could also include your channel criteria if desired
Template with channel criteria
{% set current = this.state %}
{% set value = trigger.to_state.state %}
{% set ch_id_bool = trigger.to_state.attributes.channel_id == 'default_channel' %}
{% set pattern = '\d+.?\d+' %}
{% if not ch_id_bool or not
(value | regex_findall('Glucosewaarde: '~pattern~' mmol/l') | count | bool) %}
{{ current | default('-1.0') }}
{% else %}
{{ value | regex_findall_index(pattern) }}
{% endif %}
current stores the value of the sensorâs state before it is set/changed by the rest of the template. When a value comes in from the last_notification, it is rejected if that value doesnât
fit the regex and freestyle_bg keeps the value from current.
You will likely never see the default value manifest, but I included it in case something goes wrong. You could use a non-numeric string instead of what I used, but a sensor with a unit of measurement expects a numeric value. IIRC, it would just go to âunknownâ if it defaulted to a non-numeric string. With a negative number, you have a value that is both unique and is impossible IRL, so it can be used as a trigger for a warning notification.
Trying it out now! Impressive and resourceful skills you have!
Just for the context: this can contribute to my sonâs health e.g. by sending him a reminder, after say 1 hour, once his levels tested too high. You are the hero of the day!
Thanks, for this post!
Finally, got my Freestyle libre3 data into my home assistant!
In addition to get âalwaysâ the actual glucose level in ha
I am using an old table that has been unused and forgotten
plugged it to power for always running
and using the link up app there
setting the alarm levels to the absolute max/mins, so it will continuously send alerts and updates to ha.
(I prefer to use this extern device because you have to shut down this annoying alarm noise for the freestyle libre 3 - which canât be configured in playback-sound and volume anymore)
catch the alarm and parse out the glucose level as float and trend to use in ha
SO - here is my first screenshot (dont worry, my suggar is fine - the chart has just started and showing wrong numbers)
Hello all,
I am also a Freestyle Libre 3 user. and I would also love to be able to see blood glucose in HomeAssistant. The idea with a tablet and the FreeStyle Link app seems to be the best solution so far. However, it would be great if the developers could somehow make it so that an integration for this is already provided.
Can someone help me how to get this feature to the developers?
This Python code gets current Libre data from the Libre server directly. It would be great to have a custom component that does this.
LIBRELINKUP_USERNAME = 'email@address'
LIBRELINKUP_PASSWORD = 'password'
LIBRELINKUP_URL = 'https://api-au.libreview.io' or other country server
LIBRELINKUP_VERSION = '4.7.0'
LIBRELINKUP_PRODUCT = 'llu.ios'
import requests, sys, os, json, time
from datetime import datetime
LIBRELINKUP_HEADERS = {
"version": LIBRELINKUP_VERSION,
"product": LIBRELINKUP_PRODUCT,
}
LIBRELINKUP_TOKEN = None
script_dir = os.path.dirname(__file__)
auth_token_path = os.path.join(script_dir, 'librelinkup-authtoken.txt')
if os.path.isfile(auth_token_path):
with open(auth_token_path) as json_file:
auth = json.load(json_file)
if auth['expires'] > time.time():
LIBRELINKUP_TOKEN = auth['token']
if LIBRELINKUP_TOKEN is None:
try:
response = requests.post(f'{LIBRELINKUP_URL}/llu/auth/login',
headers=LIBRELINKUP_HEADERS, json = {'email': LIBRELINKUP_USERNAME, 'password': LIBRELINKUP_PASSWORD})
response.raise_for_status()
except requests.exceptions.HTTPError as err:
print("HTTP request failed")
sys.exit(1)
data = response.json()
if data['status'] == 4:
print("Log out of LibreLinkUp. Log in again and accept new terms of use.")
sys.exit(1)
if not 'authTicket' in data['data']:
print("Authentication failed")
sys.exit(1)
with open(auth_token_path, 'w') as outfile:
json.dump(data['data']['authTicket'], outfile)
LIBRELINKUP_TOKEN = data['data']['authTicket']['token']
LIBRELINKUP_HEADERS['Authorization'] = 'Bearer ' + LIBRELINKUP_TOKEN
try:
response = requests.get(f'{LIBRELINKUP_URL}/llu/connections', headers=LIBRELINKUP_HEADERS)
print(response.text)
response.raise_for_status()
except requests.exceptions.HTTPError as err:
print("HTTP request failed")
sys.exit(1)
connections = response.json()
if not 'data' in connections or len(connections['data']) < 1:
print("Accept an invitation in the mobile app first.")
sys.exit(1)
try:
response = requests.get(f'{LIBRELINKUP_URL}/llu/connections/{connections["data"][0]["patientId"]}/graph', headers=LIBRELINKUP_HEADERS)
response.raise_for_status()
except requests.exceptions.HTTPError as err:
print("HTTP request failed")
sys.exit(1)
data = response.json()
print(response.text)
Hi, thank you for that. I am new in this selection of HA, can you give me an example where i import/write thie Code in HA so i get this Data to a Sensor in HA? I hope you understand me, what i mean.
This may help someone. This is a simple Automation using Android Last Notification as a trigger. When the Low Glucose Alarm in the Freestyle Libre3 app triggers, a notification is sent to a specific phone via home assistant mobile app.
main_phone has to have the official Freestyle Libre3 app installed with the Low Glucose Alarm setup. Automations can also be setup for the Urgent Low Glucose Alarm, High Glucose Alarm, Signal Loss Alarm.
Hi I Have the following configuration running :
3 docker images
For the connection with Freestyle i use a docker container :
timoschlueter/nightscout-librelink-up:latest
This sends the data to :
docker container : nightscout/cgm-remote-monitor:latest
Nightscout save the data in :
docker container : mongo:4.4.9
And home assistant has a Nightscout integration.
This will create an entity : sensor.blood_sugar
with measurrment mg/dL.
then i created a template sensor in the helper section with the following :
Hallo, Iâm very interested in your solution. Would you please specify how you got this work together?
Do you have an docker-compose.yml? How did you get the data from one to another container etc.?
Thank you!
Hi Philipp, is there any chance you share your configuration with us, it would be very helpful and could be live changing for me and my sugar. Thank you so much.
.
