Hello,
does someone has a code for the D1 Mini for a rain detection sensor?
Thank you!!
Some stuff here should help. But the bigger issue will be the corrosion on that sensor will render it next to useless after a few weeks in the rain.
yes, but its not the code for a D1
All you have to change is the analogue input pin assignment and the board type.
could you tell me how depending on the connection scheme at the image? that would be great. thank you in advance!!
Just change the lines
pin: GPIOxx
To whatever GPIO pin you have them connected to.
I wonder if you can just hook these up directly as a GPIO binary sensor without the intermediate hardware similar to the door sensor set-up?
For the board type:
esphome:
name: rain-sensor
platform: ESP8266
board: d1_mini
For the pin allocation change this section to use the correct pin for the D1 as per below.
- platform: adc
pin: A0
name: "Rain Sensor"
attenuation: 11db
internal: true
Which should be avoidable by not permanently connecting DC voltage to the sensor but only turning it on when taking a measurement - this and other improvements can be found here 
Hi. Could you finish your project? Can you write your latest working config pls? I would like to make the same rain sensor, but i couldn’t get the right code for it.
My Solution:
esphome:
name: wetterstation
friendly_name: wetterstation
platform: ESP8266
board: d1_mini
logger:
api:
encryption:
key: "xxx"
ota:
password: "xxx"
wifi:
ssid: xxx
password: xxx
domain: ".fritz.box"
ap:
ssid: "Wetterstation Fallback Hotspot"
password: "xxx"
web_server:
local: true
time:
- platform: homeassistant
timezone: Europe/Berlin
id: homeassistant_time
switch:
- platform: restart
name: "Restart Wetterstation"
text_sensor:
- platform: version
name: Wetterstation Version
sensor:
- platform: adc
pin: A0
name: "Regen Wert"
id: RegenWert
internal: true
update_interval: 10s
accuracy_decimals: 1
unit_of_measurement: 'V'
- platform: template
name: "Regen Sensor Volt"
unit_of_measurement: "V"
lambda: return id(RegenWert).state;
update_interval: 10s
binary_sensor:
- platform: gpio
pin:
number: D1
inverted: true
name: "Regensensor"
Regen Sensor Volt:
1V = No Rain
if below 1V than its raining
Regensensor = Rain / No Rain