ESP8266 SR04 M-2 ultrasonic Problem

ESPHome
1

hi,

I have a ESP8266 and a SR04 ultrasonic sensor, but i can’t get them to work.

My Conections
5v - Vin
RX | Trig - D5
TX | Echo - D6
GND - GND

My Code:

esphome:
  name: esphome-web-887b4a

esp8266:
  board: esp01_1m

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:


wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esphome-Web-887B4A"
    password: "YQA708yGImRg"

captive_portal:
    # Water Level Sensor
    
sensor:
  - platform: wifi_signal
    name: "WiFi Signal Sensor"
    update_interval: 60s         
    
  - platform: ultrasonic
    trigger_pin: GPIO14
    echo_pin: GPIO12
    unit_of_measurement: "%"
    icon: "mdi:water-percent"
    accuracy_decimals: 0
    update_interval: 300000ms
    name: "Sweet Water storage"             
    
   
    
    filters:
      - lambda: return (1-((x-.10)/1.10))*100;
      - filter_out: nan
      
  - platform: ultrasonic
    trigger_pin: GPIO14
    echo_pin: GPIO12
    update_interval: 20000ms    
    name: "Remaining Water in Tank"
    unit_of_measurement: "l"
    accuracy_decimals: 0
    
    filters:
      - lambda: return (1-((x-.10)/1.10))*1000;
      - filter_out: nan

And get this log

INFO Reading configuration /config/esphome/esphome-web-887b4a.yaml...
INFO Starting log output from esphome-web-887b4a.local using esphome API
INFO Successfully connected to esphome-web-887b4a.local
[16:51:05][I][app:102]: ESPHome version 2022.10.0 compiled on Oct 24 2022, 16:40:19
[16:51:05][C][wifi:502]: WiFi:
[16:51:05][C][wifi:360]:   Local MAC: E8:9F:6D:88:7B:4A
[16:51:05][C][wifi:361]:   SSID: 'POCO F3_plus_2'[redacted]
[16:51:05][C][wifi:362]:   IP Address: 192.168.1.40
[16:51:05][C][wifi:363]:   BSSID: C0:9F:E1:8A:1D:4F[redacted]
[16:51:05][C][wifi:365]:   Hostname: 'esphome-web-887b4a'
[16:51:05][C][wifi:367]:   Signal strength: -50 dB ▂▄▆█
[16:51:05][C][wifi:371]:   Channel: 2
[16:51:05][C][wifi:372]:   Subnet: 255.255.255.0
[16:51:05][C][wifi:373]:   Gateway: 192.168.1.1
[16:51:05][C][wifi:374]:   DNS1: 213.228.128.99
[16:51:05][C][wifi:375]:   DNS2: 213.228.129.67
[16:51:05][C][logger:275]: Logger:
[16:51:05][C][logger:276]:   Level: DEBUG
[16:51:05][C][logger:277]:   Log Baud Rate: 115200
[16:51:05][C][logger:278]:   Hardware UART: UART0
[16:51:05][C][ultrasonic.sensor:045]: Ultrasonic Sensor 'Sweet Water storage'
[16:51:05][C][ultrasonic.sensor:045]:   State Class: 'measurement'
[16:51:05][C][ultrasonic.sensor:045]:   Unit of Measurement: '%'
[16:51:05][C][ultrasonic.sensor:045]:   Accuracy Decimals: 0
[16:51:05][C][ultrasonic.sensor:045]:   Icon: 'mdi:water-percent'
[16:51:05][C][ultrasonic.sensor:046]:   Echo Pin: GPIO12
[16:51:05][C][ultrasonic.sensor:047]:   Trigger Pin: GPIO14
[16:51:05][C][ultrasonic.sensor:048]:   Pulse time: 10 µs
[16:51:05][C][ultrasonic.sensor:049]:   Timeout: 11661 µs
[16:51:05][C][ultrasonic.sensor:050]:   Update Interval: 300.0s
[16:51:05][C][ultrasonic.sensor:045]: Ultrasonic Sensor 'Remaining Water in Tank'
[16:51:05][C][ultrasonic.sensor:045]:   State Class: 'measurement'
[16:51:05][C][ultrasonic.sensor:045]:   Unit of Measurement: 'l'
[16:51:05][C][ultrasonic.sensor:045]:   Accuracy Decimals: 0
[16:51:05][C][ultrasonic.sensor:045]:   Icon: 'mdi:arrow-expand-vertical'
[16:51:05][C][ultrasonic.sensor:046]:   Echo Pin: GPIO12
[16:51:05][C][ultrasonic.sensor:047]:   Trigger Pin: GPIO14
[16:51:05][C][ultrasonic.sensor:048]:   Pulse time: 10 µs
[16:51:05][C][ultrasonic.sensor:049]:   Timeout: 11661 µs
[16:51:05][C][ultrasonic.sensor:050]:   Update Interval: 20.0s
[16:51:05][C][captive_portal:088]: Captive Portal:
[16:51:05][C][mdns:100]: mDNS:
[16:51:05][C][mdns:101]:   Hostname: esphome-web-887b4a
[16:51:05][C][ota:089]: Over-The-Air Updates:
[16:51:05][C][ota:090]:   Address: esphome-web-887b4a.local:8266
[16:51:05][C][api:138]: API Server:
[16:51:05][C][api:139]:   Address: esphome-web-887b4a.local:6053
[16:51:05][C][api:143]:   Using noise encryption: NO
[16:51:05][C][wifi_signal.sensor:009]: WiFi Signal 'WiFi Signal Sensor'
[16:51:05][C][wifi_signal.sensor:009]:   Device Class: 'signal_strength'
[16:51:05][C][wifi_signal.sensor:009]:   State Class: 'measurement'
[16:51:05][C][wifi_signal.sensor:009]:   Unit of Measurement: 'dBm'
[16:51:05][C][wifi_signal.sensor:009]:   Accuracy Decimals: 0
[16:51:24][D][ultrasonic.sensor:036]: 'Remaining Water in Tank' - Distance measurement timed out!
[16:51:44][D][ultrasonic.sensor:036]: 'Remaining Water in Tank' - Distance measurement timed out!
[16:52:00][D][sensor:126]: 'WiFi Signal Sensor': Sending state -44.00000 dBm with 0 decimals of accuracy
[16:52:04][D][ultrasonic.sensor:036]: 'Remaining Water in Tank' - Distance measurement timed out!

IMG_20221024_164049
IMG_20221024_1640491920×3413 369 KB

Anyone able to help me solve the problem?
Thanks

2

i got same problem. did you resolve it? can you give me some advices?

3

Have the exact same sensor and exact same problem. I think this particular sensor is crap, will try another make,

4

I read somewhere that the default pulse interval doesn’t work well with this sensor. Unfortunately, I am not able to recover the source for this information. However a pulse interval of 20 us works for me.

sensor:
  - platform: ultrasonic 
    trigger_pin: GPIO17
    echo_pin: GPIO 16
    pulse_time: 20 us
    update_interval: 10s
    name: “Ultrasonic Sensor”

Still I often get wrong distance measurements which seems to be connected wit not having the sensor positioned perfectly. Any ideas how to best position the sensor for accurate readings?

Best regards,
Dominik