Is it harmful to set the update interval to 2 seconds?
Or is there another way to be informed from the RG-15 immediately
When the update interval is set to 60 seconds, the awning is already wet 
No personal experience, but I’d love to see ESPhome support the RG-15! Maybe someone else can chime in, or we could collaborate on porting the Arduino code.
Hello @kobelka … I have done similar. However, I run the automation in Home Assistant. I have created a template and as soon as the rain sensitivity is over 0.1mm it is raining. Otherwise I find that the sensor can be too sensitive and be triggered by sunlight, mist, spray, dirt etc etc. I record rain a long time before my Velux roof windows start shutting (a seperate Velux sensor)
I note that on the RG-15 facts page it suggests that the Rain Event can be used as trigger rather than intensity. I assume there is an algorithm in the RG-15 only starts a Rain Event when a level of intensity over a period of time is being recorded (which perhaps might be closer to 0.1mm rain intensity; but I have not tested it)
The unit is running constantly in recording rain events and total rain. So I am guessing setting update_interval to say 1s is irrelevant; all it is doing is checking in with RG-15 to see the current sensor state. I would suggest 10s would be fine?
Have you set up Utility Meter in HA to record rain total for hour, day, week, month?
Edit 1: page of faq
Out of interest using Utility Meter, Apex Charts and weather forecasts to show past and future rainfall in one chart
Edit 1: Note that rain intensity as highest resolution returns data but it does NOT trigger a Rain Event in RG-15. As it should be.
Hi @JulianDH ,
I don’t know how that works for you. It rained here this morning, but the values displayed were always below 0.1. So it wouldn’t have been rain with your automation.
This shows what my sensor was reporting today:
The rain event starts on the first 0.01mm rain, accumulates the rain events over time and resets to zero after some time. I don’t know what is the time until the reset, it is not the same for all rain events.
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The event ends 60 minutes after the last raindrop.
Thank you, good to know.
I have created a template and as soon as the rain sensitivity is over 0.1mm it is raining
@JulianDH do you really mean 0,1mm ? I had a day light rain with 0,01mm.
Which update intervall do you have ?
Indeed 0.1mm. I have sensitivity set to 0.02mm and found that condensation would trigger it. I think it is entirely down to what the automation requires. My velux and hunter Hydrawise sensors I suspect are closer to 0.1mm but I will test over the summer. At the moment the only thing the template does is a warning conditional tile flag on my dashboard that is raining. On my to do list to investigate a bit more.
Can you please explain to me the main difference between the RG-9 and the RG-15. I want to measure the amount of rain in mm/h.
FYI, I gave up on the RG-9 when it suddenly died and I could no longer get serial comms to/from it.
I have since switched to a WeatherFlow Station which already has a good integration in HA but does depend on the cloud at this time. I’ve been using it for over a year and it is great.
Only thing I needed to do is put the base station on a smart outlet and have an automation cycle power to reset it once a week.
Hi, i’m intrested in what are you done with RG-15 and i need to to something like this in my home. Can you share with us more information, like the yaml file and other things?
Thank you
Hello he posted his yaml above (post 56) and I have posted my Apex Charts I am using above if that is what you would like?
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In addition i created utility helpers for the hourly, daily and monthly rainfall.
for utility meter option
The input sensor is the rain event sensor of the RG-15 device (see yaml).
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Thank you very much
I have had a RG-15 sensor in my possession for a few years… I finally reworked my ESPHome Weather Station to include it and replace a faulty BME280 sensor.
Here is my working configuration using ESP32Dev board, absent my include that does all the things for ESPHome and HomeAssistant. Pictures attached as well.
Pictures:
Yes, I know the bird feeders are empty… and yes, those are mini slinkys to keep squirrels away!
Configuration:
#####################################################################
# Weather Station
#
# - BME280 (Outside)
# - Temperature
# - Humidity
# - Pressure
# - Dallas
# - Temperature (Case)
# - Hydreon rg15
# - Rain
# - Rain Event
# - Rain Total
# - Rain Intensity
#
#####################################################################
########################
# Variable Substitutions
########################
substitutions:
device_name: "weather-station"
entity_prefix: "esphome_weather_station"
entity: "weather_station"
esphome_board: esp32dev
log_level: DEBUG
########################
# Package Includes
########################
packages:
default: !include include/default_esp32.yaml
########################
# ESPHome Status LED
########################
status_led:
pin: GPIO32
########################
# OneWire Bus
########################
one_wire:
- platform: gpio
id: one_wire_bus_0
pin: GPIO23
########################
# I2C Bus
########################
i2c:
id: i2c_bus_0
sda: GPIO21 # ESP32 Default
scl: GPIO22 # ESP32 Default
scan: false
frequency: 50kHz
########################
# Hydreon RG15 UART
########################
uart:
id: rg15_uart
tx_pin: GPIO17
rx_pin: GPIO16
baud_rate: 9600
debug:
direction: BOTH
dummy_receiver: false
after:
delimiter: "\n"
sequence:
- lambda: UARTDebug::log_string(direction, bytes);
########################
# Binary Sensors
########################
binary_sensor:
- platform: hydreon_rgxx
hydreon_rgxx_id: "hydreon_rg15"
lens_bad:
name: "Hydreon RG15 Lens Bad"
id: hydreon_rg15_lens_bad
entity_category: "diagnostic"
publish_initial_state: true
em_sat:
name: "Hydreon RG15 Emitter Saturated"
id: hydreon_rg15_em_sat
entity_category: "diagnostic"
publish_initial_state: true
# Updated from hydreon_rgxx component
- platform: template
name: "Rain"
id: binary_sensor_rain
device_class: moisture
icon: mdi:weather-rainy
publish_initial_state: true
########################
# Text Sensors
########################
text_sensor:
# Updated from hydreon_rgxx component
- platform: template
name: "Rain Intensity Class"
id: text_sensor_rain_intensity_class
icon: mdi:weather-pouring
########################
# Sensors
########################
sensor:
# Hydreon RG15
- platform: hydreon_rgxx
id: "hydreon_rg15"
model: RG_15
uart_id: rg15_uart
update_interval: 60s
resolution: high
acc:
name: "Rain"
id: sensor_rain
accuracy_decimals: 4
on_value:
then:
- if:
condition:
sensor.in_range:
id: sensor_rain
above: 0.0001
then:
binary_sensor.template.publish:
id: binary_sensor_rain
state: true
else:
binary_sensor.template.publish:
id: binary_sensor_rain
state: false
event_acc:
name: "Rain Event"
id: sensor_rain_event
accuracy_decimals: 4
total_acc:
name: "Rain Total"
id: sensor_rain_total
accuracy_decimals: 4
r_int:
name: "Rain Intensity"
id: sensor_rain_intensity
accuracy_decimals: 4
# https://en.wikipedia.org/wiki/Rain#Intensity
on_value:
- if:
condition:
sensor.in_range:
id: sensor_rain_intensity
below: 0.00001
then:
- text_sensor.template.publish:
id: text_sensor_rain_intensity_class
state: "Clear"
- if:
condition:
sensor.in_range:
id: sensor_rain_intensity
above: 0.00001
below: 2.5
then:
- text_sensor.template.publish:
id: text_sensor_rain_intensity_class
state: "Light Rain"
- if:
condition:
sensor.in_range:
id: sensor_rain_intensity
above: 2.5
below: 7.6
then:
- text_sensor.template.publish:
id: text_sensor_rain_intensity_class
state: "Moderate Rain"
- if:
condition:
sensor.in_range:
id: sensor_rain_intensity
above: 7.6
below: 50
then:
- text_sensor.template.publish:
id: text_sensor_rain_intensity_class
state: "Heavy Rain"
- if:
condition:
sensor.in_range:
id: sensor_rain_intensity
above: 50
then:
- text_sensor.template.publish:
id: text_sensor_rain_intensity_class
state: "Violent Rain"
# Case temperature using Dallas 1-Wire Sensor
- platform: dallas_temp
id: case_temperature
one_wire_id: one_wire_bus_0
resolution: 12
address: 0x800316A279D2D828
name: "${entity_prefix}_case_temperature"
icon: mdi:home-thermometer-outline
entity_category: "diagnostic"
filters:
- offset: -0.22
- sliding_window_moving_average:
window_size: 10
send_every: 2
send_first_at: 2
# BME280 Temperature, Humidity and Pressure
- platform: bme280_i2c
i2c_id: i2c_bus_0
address: 0x76
update_interval: 1min
temperature:
id: outside_temperature
name: "Outside Temperature"
pressure:
id: outside_pressure
name: "Outside Pressure"
humidity:
id: outside_humidity
name: "Outside Humidity"
- platform: template
name: "Outside Altitude"
lambda: |-
const float STANDARD_SEA_LEVEL_PRESSURE = 1013.2074890666767; //in hPa, see note
return ((id(outside_temperature).state + 273.15) / 0.0065) *
(powf((STANDARD_SEA_LEVEL_PRESSURE / id(outside_pressure).state), 0.190234) - 1); // in meter
update_interval: 15s
icon: 'mdi:signal'
unit_of_measurement: 'm'
device_class: distance
filters:
- sliding_window_moving_average:
window_size: 10
send_every: 2
send_first_at: 2
- platform: absolute_humidity
name: "Outside Absolute Humidity"
temperature: outside_temperature
humidity: outside_humidity
- platform: template
name: "Outside Dew Point"
lambda: |-
return (243.5*(log(id(outside_humidity).state/100)+((17.67*id(outside_temperature).state)/
(243.5+id(outside_temperature).state)))/(17.67-log(id(outside_humidity).state/100)-
((17.67*id(outside_temperature).state)/(243.5+id(outside_temperature).state))));
unit_of_measurement: °C
icon: 'mdi:thermometer-alert'
device_class: temperature
filters:
- sliding_window_moving_average:
window_size: 10
send_every: 2
send_first_at: 2
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