Rain drop sensor with digital gpio binary sensor not working

ESPHome
1

Hi,

I am trying to make a digital Rain drop sensor on D8 of a Wemos D1. This should be a digital in/out.
I attached a Rain drop sensor, which includes a LM393. I created the following code in esphome:

binary_sensor:
  - platform: gpio
    pin: 
      number: D8
    name: ${display_name} Rain
    device_class: moisture

But it is not working. I can turn the sensor on with the potentionmeter, led is on, but no log on the esphome output log and no change in HA.

Who has an idea?

2

Sounds like a wiring fault. How did you power and connect the sensor to the ESP?

3

Just simple. Vcc to 3,3v, ground to ground, and d0 of the lm393 to d8 of the wemos.

1 Like
4

See here: perhaps rewire and recode for one of the pins labelled OK for input.

5

d8 is “ pulled to GND” according to link. Should I make a change in esphome? To e.g. INPUT_PULLDOWN?

6

No you should wire the sensor to

1 Like
7

Strange; testing on D5 is working now, i tested D7 and that is working not either. D5 is working so fine to me.

1 Like
8

Would you mind helping me?

my code is as follows

esphome:

name: rain-sensor



esp8266:

board: d1_mini



# Enable logging

logger:



# Enable Home Assistant API

api:



ota:

password: !secret otapassword



wifi:

ssid: !secret wifi_ssid

password: !secret wifi_password

fast_connect: true



# Enable fallback hotspot (captive portal) in case wifi connection fails

ap:

ssid: "Rain-Sensor Fallback Hotspot"

password: !secret rain_sensor_password



captive_portal:



switch:

- platform: gpio

pin: D0

name: "Rain sensor power"



sensor:

- platform: adc

id: source_sensor

pin: A0



- platform: resistance

sensor: source_sensor

id: real_resistance_sensor

name: "${friendly_name} rain"

configuration: DOWNSTREAM

resistor: 5.1kOhm

reference_voltage: 3.3V

internal: true

icon: "mdi:omega"

on_value:

then:

- if:

condition:

lambda: |-

return (

id(real_resistance_sensor).state > 100

);

then:

- sensor.template.publish:

id: real_resistance_sensor

state: !lambda 'return ON;'

But i get a compile error 'Unable to find action with the name ‘sensor.template.publish’ ’