If I try your Rain per hour sensor, I get the following error in the log:
homeassistant.exceptions.TemplateError: TypeError: '>' not supported between instances of 'NoneType' and 'int'
I have done some changes and my template is now like this:
rain_today:
friendly_name: Regn i dag
unit_of_measurement: mm
value_template: >-
{% set count = states('sensor.regnsensor_vippe') | int %}
{% if states.sensor.date_time_iso.last_changed - states.sensor.regn_i_dag.last_changed > timedelta(minutes=60) %}
{% set mm_per_pulse = 0.303 %}
{% else %}
{% set mm_per_pulse = 0.30303 %}
{% endif %}
{% set mm = count * mm_per_pulse %}
{% if states('sensor.regnsensor_vippe') != 'unknown' %}
{{ mm }}
{% else %}
{{ states('sensor.regn_i_dag') }}
{% endif %}
regn_pr_hour:
friendly_name: "Regn pr time"
unit_of_measurement: 'mm/h'
value_template: >-
{% if state_attr('binary_sensor.regn','gradient') != None and state_attr('binary_sensor.regn','gradient') > 0 and state_attr('binary_sensor.regn','gradient') < 0.0278 %}
{{ (state_attr('binary_sensor.regn','gradient')*3600) | round(1) }}
{% else %}
0
{% endif %}
- platform: trend
sensors:
rain:
entity_id: sensor.rain_today
min_gradient: 0.000138889
max_samples: 3
The trend sensor doesn’t update when it stops raining so I made a change to the tamplate to handle that. You can use sensor.time or sensor.date_time_iso as I did.
2 Likes
That’s A LOT of rain! Most I’ve had here was like 16mm a day. Good to hear it works great 
@bergasha by the way, how accurate is it compared to your weather station?
If I wanted to change the rain tips sensor to record from 9am for 24 hours could you suggest what the code is please?
My local govt weather reports since 9am and the previous 24 hour periods for up to a week.
NB… I am a horrible coder, but like to tinker.
This should work
sensor:
- platform: history_stats
name: Raingauge tips
entity_id: binary_sensor.raingauge_on_off
state: 'off'
type: count
start: '{{ now().replace(hour=9, minute=0, second=0) }}'
duration:
hours: 24
1 Like
Hi all. I made the rain gauge and used the yaml code at the top of this thread. It works as intended but I noticed a lag of quite some time between the Xiaomi binary sensor (open/close/open) and the two sensors (history_stats and calculation to mm). In my example it’s about 24 seconds.
Does anybody noticed that also? And does anybody has an explanation for this behaviour?
Hi, I also have a small delay now and then. But thats like 3 seconds. Does not really matter for me.
The delay is probably caused by the history sensor. I don’t know how HA handles the updates of the history sensor.
Mine also has a slight delay (under 10 sec) I did notice if it tips again before it updates it will add the two tips onto the history do I don’t believe it misses any.
For those interested, here is a card to see the rainfall of the past days, made with mini-graph-card.
type: 'custom:mini-graph-card'
icon: 'mdi:weather-rainy'
aggregate_func: max
hours_to_show: 730
group_by: date
show:
graph: bar
entities:
- entity: sensor.regenval_vandaag
color: aqua
I keep my history for a month (730 hours) but if you keep yours less it might show less bars.
8 Likes
Thanks for this guide. I’ve bought the same bucket, and as I already have a ESP 8266 running Konnected.io nearby, I simply connected the two wires coming out of the bucket into that. After configuring the HA konnected plugin, it’s working immediately, with the bucket acting as the reed switch and HA in “rain” mode acting as a pulse counter.
1 Like
Pretty sure this was working fine until recent updates to HA. Now, on every restart, I get 0.3mm added. Even the reset at midnight started at 0.3mm yesterday …
- platform: history_stats
name: Raingauge tips
entity_id: binary_sensor.zb_rain_sensor
state: 'off'
type: count
start: '{{ now().replace(hour=0, minute=0, second=0) }}'
end: '{{ now() }}'
- platform: template
sensors:
rainfall_today:
friendly_name: Rainfall today
unit_of_measurement: mm
value_template: >-
{% set count = states('sensor.raingauge_tips') | int %}
{% set mm_per_pulse = 0.30303 %}
{% set mm = count * mm_per_pulse %}
{{ mm|round(1, 'floor') }}
1 Like
Have you tried the retain option? (if you use z2m)
Am using ZHA …
Just tested it on my instance, I don’t have this behavior… ZHA with conbee II
Am on ZHA with Sonoff Tasmota ZB-Bridge … I zero’d it out manually (via dev > state) and restarted (I didn’t zero out the tips though)
… it’s now at 1.5mm … 
state: "off" was my issue, I think. Makes sense for this to be state: "on" to count tips. I was getting a count at midnight reset and then off state was triggered again on restart.