What kind of soldering iron did you use? I find it best to use an iron on low heat with a small pointed tip. You can get a decent one that you can adjust the heat on for around $15
I used one bought in Aliexpress where you can adjust temperature from 200 to 400°c.
Would you have any reference to share ?
And at what temperature should be done ?
Thanks
I didn’t really know how to write comments in Jinja2 (I assumed it was just #comment, but its {# comment #})
I’ve updated my code, but you should be ok to just delete the #replace 0.1 with your mm of rain per tip value comment
Other note is my setup is configured so the binary sensor reads on half the time, and off half the time, the default configuration is a momentary on on each tip.
If you would like to set it up in this configuration change the trigger as follows:
- trigger:
- platform: state
entity_id: binary_sensor.rain_sensor
from: 'off'
to: 'on'
(untested)
Depends on the solder you are using, best to consult the datasheet. Here’s a quick reference chart: Soldering Temperature Chart
60/40 lead solder tends to be the easiest to start out with, I personally use Kester K100LD lead free (it’s almost as easy to work with). As with any solder make sure you clean your hands and clean your workspace after working, don’t inhale the fumes.
If you can purchase some perfboard it may be worth practicing soldiering and desoldering wires or other cheap components from it until you get the hang of it.
Good morning, another stupid question. Does anyone have an idea for an automation that tells you whether it’s raining or not and doesn’t constantly change every few minutes? Best regards 
Something like this might be more suitable for detecting rain.
You might also be able to hook it up to an aqara sensor instead of an ESP.
1 Like
I’ve made a small jig to hold the aquara sensor in the same form factor as the original sensor. The reed switch is still 90deg from the optimal orientation but it works fine for me. This is placed so the reed switch is closed half the time, not momentarily every tip.
https://www.printables.com/model/823854-rain-gauge-aquara-holder
3 Likes
Hi All
I 3D printed this one / Used Aqara sensor SS4H-RG Smart Rain Gauge – DIY project based on ESP32 and ESPHome – Smart Solutions for Home
But I need some help, this is my config. But for some reason when there is no rain it still reports 0.5mm for the day
I cant seem to workout what is wrong with my code? I want to get this fixed because its adding approx 15mm to every months rainfall total.
sensor:
- platform: history_stats
name: "Aqara Rainsensor flips/on"
entity_id: binary_sensor.rainmeter_opening
state: "on"
type: count
start: "{{ now() - timedelta(hours=24)}}"
end: "{{ now() }}"
- platform: history_stats
name: "Aqara Rainsensor flips/off"
entity_id: binary_sensor.rainmeter_opening
state: "off"
type: count
start: "{{ now() - timedelta(hours=24)}}"
end: "{{ now() }}"
template:
- sensor:
- name: Rainfall [day]
state_class: measurement
unique_id: rainfall_day
unit_of_measurement: mm
icon: mdi:weather-pouring
state: >-
{% set count = (states('sensor.aqara_rainsensor_flips_on') | int(0)) + (states('sensor.aqara_rainsensor_flips_off') | int(0)) %}
{% set mm = count * 0.52615 %}
{% if count >= 0 %}
{{ mm|round(1, 'floor') }}
{% endif %}
Does anyone have any ideas (this is my first experience with HA so I am new to the code)
thanks
Your rain gauge works differently than the one in the original post. The original post only counts the on states, this one counts both states.
I suspect that the history_stats sensor binary_sensor.rainmeter_opening counts 1 if the current state is either on or off, regardless if it changed or not. Or do you restart HA every night or something like that, causing a state change?
It looks like @ekainz uses the same counting method, perhaps he can share his config 
Unfortunately, nothing works anymore 
What could be the problem?
Is this a HomeAssistant bug?
@ekainz Can you please share your actual config? 
It means that zwischenTropfen has no value. Print all the variables there to see what is wrong.
HA server is only restarted when there is a power outage.
I wonder if the state is resetting itself on its own?
I don’t understand that. That’s all there is to it. What else should I add?
Here again the whole part from the configuration.yml:
- sensor:
- name: "Regen Intensitaet"
unique_id: regen_intensitaet
state: >
{% set letzterTropfen = (as_timestamp(now()) - as_timestamp(states.binary_sensor.diy_zigbee_regenmesser_contact.last_changed)) %}
{% set zwischenTropfen = states('sensor.regen_sensor_zeit_zwischen_tropfen') | as_timedelta %}
{% set max_zeit = max(letzterTropfen, zwischenTropfen.total_seconds()) %}
{{ (0.30303 / (max_zeit / 3600)) | round(1, default=0) }} {# replace 0.30303 with your mm of rain per tip value #}
state_class: measurement
device_class: precipitation_intensity
unit_of_measurement: "mm/h"
- trigger:
- platform: state
entity_id: binary_sensor.diy_zigbee_regenmesser_contact
- sensor:
- name: Regen Sensor Zeit zwischen Tropfen
unique_id: regen_sensor_zeit_zwischen_tropfen
state: >
{{ (now() - trigger.states.binary_sensor.diy_zigbee_regenmesser_contact.last_changed).total_seconds() }}
state_class: measurement
unit_of_measurement: "s"
- sensor:
- name: Regen Heute
unit_of_measurement: mm
state_class: total_increasing
unique_id: regen_heute
state: >-
{% set count = states('sensor.regensensor_flips') | int(0) %}
{% set mm = count * 0.30303 %}
{% if count >= 0 %}
{{ mm|round(1, 'floor') }}
{% endif %}
# If you have issues with the history sensor doubling after restarting HA, add the line below
availability: "{{ (states('sensor.regensensor_flips') not in ('unknown', 'unavailable')) }}"
- sensor:
- platform: history_stats
name: Regensensor flips
entity_id: binary_sensor.diy_zigbee_regenmesser_contact #The aqara sensor
state: 'off'
type: count
start: '{{ now().replace(hour=0, minute=0, second=0) }}'
end: '{{ now() }}'
There’s really not much more to my config, I have an automation that increments counter.rain_sensor_tips on each tip and resets at midnight, a template to convert those values to mm, and some statistics sensors.
I recommend starting with my code verbatim, getting that to work, then editing the variable names.
sensor:
- platform: statistics
name: 60 Second Rainfall
unique_id: rainfall_60sec
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
seconds: 60
- platform: statistics
name: 5 Minute Rainfall
unique_id: rainfall_5min
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
minutes: 5
- platform: statistics
name: 15 Minute Rainfall
unique_id: rainfall_15min
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
minutes: 15
- platform: statistics
name: 60 Minute Rainfall
unique_id: rainfall_60min
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
hours: 1
- platform: statistics
name: 6 Hour Rainfall
unique_id: rainfall_6hour
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
hours: 6
- platform: statistics
name: 24 Hour Rainfall
unique_id: rainfall_24hour
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
hours: 24
- platform: statistics
name: 7 Day Rainfall
unique_id: rainfall_7day
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
days: 7
- platform: statistics
name: 30 Day Rainfall
unique_id: rainfall_30day
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
days: 30
- platform: statistics
name: 365 Day Rainfall
unique_id: rainfall_365day
entity_id: sensor.rainfall_today
state_characteristic: sum_differences_nonnegative
max_age:
days: 365
template:
- sensor:
- name: "Rainfall Today"
unit_of_measurement: mm
state_class: total_increasing
unique_id: rainfall_today
state: >-
{% set count = states('counter.rain_sensor_tips') | int(0) %}
{% set mm = count * 0.1 %}
{% if count >= 0 %}
{{ mm|round(1, 'floor') }}
{% endif %}
availability: "{{ (states('counter.rain_sensor_tips') not in ('unknown', 'unavailable')) }}"
- name: "Rain Intensity"
unique_id: rain_intensity
state: >
{% set lastTip = (as_timestamp(now()) - as_timestamp(states.binary_sensor.rain_sensor.last_changed)) %}
{% set betweenTips = states('sensor.rain_sensor_time_between_tips') | as_timedelta %}
{% set max_time = max(lastTip, betweenTips.total_seconds()) %}
{{ (0.1 / (max_time / 3600)) | round(1, default=0) }}
state_class: measurement
device_class: precipitation_intensity
unit_of_measurement: "mm/h"
- trigger:
- platform: state
entity_id: binary_sensor.rain_sensor
sensor:
- name: Rain Sensor time between tips
unique_id: rain_sensor_time_between_tips
state: >
{{ (now() - trigger.from_state.last_changed).total_seconds() }}
state_class: measurement
unit_of_measurement: "s"
Heres the automation:
alias: Rain Sensor
description: ""
trigger:
- platform: state
entity_id:
- binary_sensor.rain_sensor
from: "on"
to: "off"
id: "0"
- platform: state
entity_id:
- binary_sensor.rain_sensor
from: "off"
to: "on"
id: "0"
- platform: time
at: "00:00:00"
id: "1"
condition: []
action:
- choose:
- conditions:
- condition: trigger
id:
- "0"
sequence:
- service: counter.increment
metadata: {}
data: {}
target:
entity_id: counter.rain_sensor_tips
- conditions:
- condition: trigger
id:
- "1"
sequence:
- service: counter.reset
metadata: {}
data: {}
target:
entity_id: counter.rain_sensor_tips
mode: single
1 Like
I personally just found it easier to count flips with a counter helper and an automation to increment, that way home assistant restarts don’t affect my values. I find it generally less confusing.
2 Likes
Is it possible to use this method but with wifi instead of Zigbee?
Yes, you can, with an ESP32 or ESP8266. However it would probably be need to be wired to a power outlet, as wifi consumes a lot of power compared to zigbee. That’s why I used zigbee for this. For comparison, the aqara sensor has been using the same battery since I created this post. (3+ years!)
1 Like
yea. My setup will be 2 years come this June. Still reads 100% battery life which I find very strange, but it still tipping. 6.6mm of rain in the last 3 hrs as I am writing this post.
1 Like
Sadly I got this error in log file:
- Template variable error: ‘None’ has no attribute ‘total_seconds’ when rendering ‘{% set lastTip = (as_timestamp(now()) - as_timestamp(states.binary_sensor.diy_zigbee_regenmesser_contact.last_changed)) %} {% set betweenTips = states(‘sensor.regen_sensor_zeit_zwischen_tropfen’) | as_timedelta %} {% set max_time = max(lastTip, betweenTips.total_seconds()) %} {{ (0,30303 / (max_time / 3600)) | round(1, default=0) }}’
And the intensity is always at 0,0mm/h also when its raining heavy
Do you know why?
I’ve recently set-up the rain gauge and am very thankful for the contribution.
I don’t think the Daily Rainfall function is working and I don’t know why.
There are currently 74 sensor flips but no daily rainfall amount. Rainfall today = unknown, same for weekly, monthly and annual, of course.
Here is an exerpt of my configuration.yaml -
group: !include groups.yaml
automation: !include automations.yaml
script: !include scripts.yaml
scene: !include scenes.yaml
sensor: !include sensors.yaml
#template: !include templates.yaml
# Example configuration.yaml entry
utility_meter:
energy:
source: sensor.pixel_4a_steps_sensor
name: Daily Steps
cycle: daily
rain_week:
source: sensor.rainfall_today
cycle: weekly
unique_id: rainfall_week
rain_month:
source: sensor.rainfall_today
cycle: monthly
unique_id: rainfall_month
rain_year:
source: sensor.rainfall_today
cycle: yearly
unique_id: rainfall_year
template:
- sensor:
- name: Rainfall Today
device_class: precipitation
unit_of_measurement: in
state_class: total_increasing
unique_id: rainfall_today
state: >-
{% set count = states('sensor.rainsensor_flips') | int(0) %}
{% set in = count * 0.01193 %}
{% if count >= 0 %}
{{ in|round(1, 'floor') }}
{% endif %}
# If you have issues with the history sensor doubling after restarting HA, add the line below (@BigG)
#availability: "{{ (states('sensor.rainsensor_flips') not in ('unknown', 'unavailable')) }}"
sensors.yaml exerpt below -
- platform: history_stats
name: Rain sensor flips
entity_id: binary_sensor.rain_sensor_on_off
state: 'off'
type: count
start: '{{ now().replace(hour=0, minute=0, second=0) }}'
end: '{{ now() }}'
Input is appreciated.
Thanks!