Hya,
i have the nodemcu-32s with esphome. a DHT sensor on gpio13.
# temparature and humidity
- platform: dht
pin: GPIO13
temperature:
name: "DHT Temperature"
id: dht_temperature
humidity:
name: " DHT Humidity"
id: dht_humidity
update_interval: 15s
no errors, but no output. shows NA.
By measuring the tensions, nodemcu by USB, 5V present, 3V3 present and by gpio13 (connected to DHT) 3V9.
Is it normal? And why does it shows NA?
Thx for any advise.
Do you need to add a 4K7 to 10K Ohm resistor?
Also not using the default auto device model can help:
# temparature and humidity
- platform: dht
model: DHT22 # <---- add the correct model
pin: GPIO13
temperature:
name: "DHT Temperature"
id: dht_temperature
humidity:
name: " DHT Humidity"
id: dht_humidity
update_interval: 15s
You don’t mention which model DHT you are using. The valid options for model are listed here: DHT Temperature+Humidity Sensor — ESPHome
Thx for the answer.
Yes, i have a 10K pullup between gpio13 (pin2 dht) and 3V3 (pin 1 nodemcu).
Voltage by gpio13 is 3V9… normal?
And DHT model AM2302.
DHT22 devices are often marked with AM2302. Try specifying DHT22 as the model.
How long are the cables to the DHT device?
Yes the voltage on GPIO13 is normal. It is being pulled up by the resistor. If you had a meter that reacted fast enough (or an oscilloscope) you would see this pulled to ground as data was transferred.
cable lenght: none. soldered to protoboard, next to the nodemcu.
I fixed the code to:
- platform: dht
model: AM2302
pin: GPIO13
temperature:
name: "DHT Temperature"
id: dht_temperature
humidity:
name: " DHT Humidity"
id: dht_humidity
update_interval: 15s
I get:
[17:05:16][W][dht:169]: Requesting data from DHT failed!
[17:05:16][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number).
[17:05:26][C][dht:017]: DHT:
[17:05:26][C][dht:018]: Pin: GPIO13
[17:05:26][C][dht:024]: Model: DHT22 (or equivalent)
[17:05:26][C][dht:027]: Update Interval: 15.0s
[17:05:26][C][dht:029]: Temperature 'DHT Temperature'
[17:05:26][C][dht:029]: Device Class: 'temperature'
[17:05:26][C][dht:029]: State Class: 'measurement'
[17:05:26][C][dht:029]: Unit of Measurement: '°C'
[17:05:26][C][dht:029]: Accuracy Decimals: 1
[17:05:26][C][dht:030]: Humidity ' DHT Humidity'
[17:05:26][C][dht:030]: Device Class: 'humidity'
[17:05:26][C][dht:030]: State Class: 'measurement'
[17:05:26][C][dht:030]: Unit of Measurement: '%'
[17:05:26][C][dht:030]: Accuracy Decimals: 0
fixed to model: DHT22,
output:
[17:14:27][W][dht:169]: Requesting data from DHT failed!
[17:14:27][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number).
cable lenght: none. soldered to protoboard, next to the nodemcu.
Double check your wiring.
already did. it’s all ok. no shorts. pin 1 from dht to 3V3, pin 2 to gpio13, pin 4 to gnd and 10K resistor between pin 2 and pin 1 (pullup). 
Pin numbering left to right looking at the front of the device (with the vent holes)?
If so, then you may have a dead sensor. Where did you buy it?
yes, sir.
i had it on my desk. how do i test if it’s alive or dead?
You pretty much just did.
tried another DHT22. same error.
replaced by a ds18b20, replacing the 10K by a 4.7K, and… nothing…
is the GPIO13 useable by ESPHome?
I’m using this board.
Yeah I did check that earlier, it is fine. See: ESP32 Pinout Reference: Which GPIO pins should you use? | Random Nerd Tutorials
[19:55:19][C][dallas.sensor:075]: DallasComponent:
[19:55:19][C][dallas.sensor:076]: Pin: GPIO13
[19:55:19][C][dallas.sensor:077]: Update Interval: 60.0s
[19:55:19][W][dallas.sensor:080]: Found no sensors!
this is what i get.
What board definition are you using?
Try another GPIO, and try configuring a GPIO input to GPIO13 to test it with 3.3v and gnd.
connected to gpio27.
dallas:
pin:
number: 27
inverted: true
mode:
input: true
output: true
[20:24:31][C][dallas.sensor:075]: DallasComponent:
[20:24:31][C][dallas.sensor:076]: Pin: GPIO27
[20:24:31][C][dallas.sensor:077]: Update Interval: 60.0s
[20:24:31][W][dallas.sensor:080]: Found no sensors!
i just don’t understand.
my entire yaml. maybe i’m doing something terrible wrong. All the i2c devices are working. I’m just not being able to make a sensor work.
substitutions:
esphome_name: weather-station
friendly_name: "Weather Station"
esphome_comment: Weather Station
esphome_project_name: PJW.Weather_Station_ESP32
software_version: 2023 12 29 V01
esphome_project_version: Weather Station ESP32, $software_version
devicename: weather_station
upper_devicename: "Weather Station"
log_level: debug # Enable levels logging https://esphome.io/components/logger.html
# none, error, warn, info, debug (default), verbose, very_verbose
esphome:
name: $esphome_name
platform: ESP32
board: nodemcu-32s
project:
name: $esphome_project_name
version: $esphome_project_version
# on_boot:
# priority: -10
# then:
# - script.execute: flashing
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "${name} Fallback"
password: !secret fallback_hotspot_password
captive_portal:
ota:
password: !secret esphome_ota_password
api:
encryption:
key: !secret esphome_api_encrypt_key
reboot_timeout: 0s
web_server:
port: 80
sun:
latitude: !secret latitude
longitude: !secret longitude
time:
- platform: sntp
timezone: UTC-3
logger:
level: ${log_level}
logs:
text_sensor: WARN
i2c:
frequency: 100kHz
sda: GPIO26
scl: GPIO25
ads1115:
- address: 0x48
dallas:
pin:
number: 27
inverted: true
mode:
input: true
output: true
binary_sensor:
- platform: gpio
pin:
number: 13
mode:
input: true
pullup: true
name: ds18b20
sensor:
# analog to digital 4 channels
- platform: ads1115
name: "${friendly_name} ADS1115-0"
multiplexer: 'A0_GND'
id: ads1115_A0
gain: 6.144
- platform: ads1115
name: "${friendly_name} ADS1115-1"
multiplexer: 'A1_GND'
id: ads1115_A1
gain: 6.144
- platform: ads1115
name: "${friendly_name} ADS1115-2"
multiplexer: 'A2_GND'
id: ads1115_A2
gain: 6.144
- platform: ads1115
name: "${friendly_name} ADS1115-3"
multiplexer: 'A3_GND'
id: ads1115_A3
gain: 6.144
# anemometer - wind speed detector - in VCC 10 to 14V, out 0 to 5V * 6 = meters / second , meters / second * 3.6 = km/h
- platform: ina226
address: 0x40
shunt_resistance: 0.1 ohm
current:
name: "${friendly_name} wind speed current"
power:
name: "${friendly_name} wind speed power"
bus_voltage:
name: "${friendly_name} wind speed voltage"
id: wind_speed_voltage
filters:
- calibrate_linear:
datapoints:
- 0.0 -> 0.0
- 5.0 -> 30.0
shunt_voltage:
name: "${friendly_name} wind speed shunt voltage"
max_current: 3.2A
update_interval: 5s
- platform: copy
name: '${friendly_name} wind speed (km/h)'
id: wind_speed_kmh
source_id: wind_speed_voltage
unit_of_measurement: 'km/h'
icon: 'mdi:weather-windy'
filters:
- multiply: 3.6
- platform: copy
name: '${friendly_name} wind speed average'
icon: 'mdi:weather-windy'
id: wind_speed_avg
source_id: wind_speed_voltage
unit_of_measurement: 'm/s'
filters:
- throttle_average: 5s
- platform: copy
name: '${friendly_name} wind speed average (km/h)'
icon: 'mdi:weather-windy'
id: wind_speed_kmh_avg
source_id: wind_speed_voltage
unit_of_measurement: 'km/h'
filters:
- multiply: 3.6
on_value:
lambda: |-
if (x < 1) {
id(wind_scale_code).publish_state("0");
id(wind_scale).publish_state("Calm");
} else if (x >= 1 && x < 6) {
id(wind_scale_code).publish_state("1");
id(wind_scale).publish_state("Light Air");
} else if (x >= 6 && x < 12) {
id(wind_scale_code).publish_state("2");
id(wind_scale).publish_state("Light Breeze");
} else if (x >= 12 && x < 20) {
id(wind_scale_code).publish_state("3");
id(wind_scale).publish_state("Gentle Breeze");
} else if (x >= 20 && x < 29) {
id(wind_scale_code).publish_state("4");
id(wind_scale).publish_state("Moderate Breeze");
} else if (x >= 29 && x < 39) {
id(wind_scale_code).publish_state("5");
id(wind_scale).publish_state("Fresh Breeze");
} else if (x >= 39 && x < 50) {
id(wind_scale_code).publish_state("6");
id(wind_scale).publish_state("Strong Breeze");
} else if (x >= 50 && x < 62) {
id(wind_scale_code).publish_state("7");
id(wind_scale).publish_state("Near Gale");
} else if (x >= 62 && x < 75) {
id(wind_scale_code).publish_state("8");
id(wind_scale).publish_state("Gale");
} else if (x >= 75 && x < 89) {
id(wind_scale_code).publish_state("9");
id(wind_scale).publish_state("Severe Gale");
} else if (x >= 89 && x < 103) {
id(wind_scale_code).publish_state("10");
id(wind_scale).publish_state("Storm");
} else if (x >= 103 && x < 118) {
id(wind_scale_code).publish_state("11");
id(wind_scale).publish_state("Violent Storm");
} else if (x >= 118) {
id(wind_scale_code).publish_state("12");
id(wind_scale).publish_state("Hurricane Force");
} else {
ESP_LOGD("main", "It shouldn't happen (wind_speed_kmh_avg: %f)", x);
}
# wind direction indicator
- platform: ina226
address: 0x41
shunt_resistance: 0.1 ohm
current:
name: "${friendly_name} wind direction current"
power:
name: "${friendly_name} wind direction power"
bus_voltage:
name: "${friendly_name} wind direction voltage"
id: wind_direction_voltage
shunt_voltage:
name: "${friendly_name} wind direction shunt voltage"
max_current: 3.2A
update_interval: 5s
# wind direction sensor voltage decoding
- platform: copy
name: '${friendly_name} wind direction heading'
id: wind_direction_heading
source_id: wind_direction_voltage
on_value_range:
- below: 0.70
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "N"
- sensor.template.publish:
id: wind_heading
state: 0.0
- above: 0.70
below: 1.42
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "NE"
- sensor.template.publish:
id: wind_heading
state: 45.0
- above: 1.42
below: 2.14
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "E"
- sensor.template.publish:
id: wind_heading
state: 90.0
- above: 2.14
below: 2.84
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "SE"
- sensor.template.publish:
id: wind_heading
state: 135.0
- above: 2.84
below: 3.56
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "S"
- sensor.template.publish:
id: wind_heading
state: 180.0
- above: 3.56
below: 4.27
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "SW"
- sensor.template.publish:
id: wind_heading
state: 225.0
- above: 4.27
below: 4.99
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "W"
- sensor.template.publish:
id: wind_heading
state: 270.0
- above: 4.99
then:
- text_sensor.template.publish:
id: wind_dir_card
state: "NW"
- sensor.template.publish:
id: wind_heading
state: 315.0
- platform: template
name: "${friendly_name} wind heading"
id: wind_heading
unit_of_measurement: "°"
# rain volume - tippet bucket - reed switch (pulse)
- platform: pulse_counter
pin: # Don't forget to add a pulling resistor 10K, . 3V3 ---10 K----(gpio 38)-- reed swicth from tippet bucket--- GND
number: GPIO38
mode: INPUT
unit_of_measurement: 'mm'
name: "${friendly_name} rain gauge"
icon: 'mdi:weather-rainy'
id: rain_gauge
internal: true
count_mode:
rising_edge: DISABLE
falling_edge: INCREMENT
internal_filter: 13us
update_interval: 60s
filters:
# Each 0.011" (0.2794mm) of rain causes one momentary contact closure
- multiply: 0.2794
accuracy_decimals: 4
- platform: integration
name: "${friendly_name} rainfall per min"
id: rain_per_min
time_unit: min
unit_of_measurement: 'mm'
icon: 'mdi:weather-rainy'
sensor: rain_gauge
- platform: total_daily_energy
name: "${friendly_name} total daily rain"
power_id: rain_gauge
unit_of_measurement: 'mm'
icon: 'mdi:weather-rainy'
# x60 To convert to aggregated rain amount
filters:
- multiply: 60
# temparature and humidity
# dallas or dht
# temparature, pressure and humidity
- platform: bme280
address: 0x76
temperature:
name: "${friendly_name} temperature"
id: bme280_temperature
pressure:
name: "${friendly_name} pressure"
id: bme280_pressure
humidity:
name: "${friendly_name} relative humidity"
id: bme280_humidity
update_interval: 10s
- platform: template
name: "Altitude"
lambda: |-
const float STANDARD_SEA_LEVEL_PRESSURE = 1013.25; //in hPa, see note
return ((id(bme280_temperature).state + 273.15) / 0.0065) *
(powf((STANDARD_SEA_LEVEL_PRESSURE / id(bme280_pressure).state), 0.190234) - 1); // in meter
update_interval: 15s
icon: 'mdi:signal'
unit_of_measurement: 'm'
- platform: absolute_humidity
name: "Absolute Humidity"
temperature: bme280_temperature
humidity: bme280_humidity
- platform: template
name: "Dew Point"
lambda: |-
return (243.5*(log(id(bme280_humidity).state/100)+((17.67*id(bme280_temperature).state)/
(243.5+id(bme280_temperature).state)))/(17.67-log(id(bme280_humidity).state/100)-
((17.67*id(bme280_temperature).state)/(243.5+id(bme280_temperature).state))));
unit_of_measurement: °C
icon: 'mdi:thermometer-alert'
# ambient light
- platform: tsl2561
address: 0x39
name: "${friendly_name} tsl 2561 ambient light"
id: tsl_2561_ambient_light
is_cs_package: false
update_interval: 4s
integration_time: 14ms
gain: 1x
# UV and Ambient Light
- platform: ltr390
address: 0x53
uv_index:
name: "${friendly_name} ltr390 uv index"
id: ltr390_uv_index
uv:
name: "${friendly_name} ltr390 uvs"
id: ltr390_uvs
filters:
lambda: |-
float wfac = 1.0; // wfac
float gain = 3.0; // gain
return ( ((id(ltr390_uvs).state * wfac) / 2300) * 4 * ( 18 / gain ));
# - multiply: 0.010434782608695652173913 # UVI = ( uv / 2300 * wfac ) * 4 * ( 18 / gain ); gain=3, wfac=1
# - sliding_window_moving_average:
# window_size: 15
# send_every: 1
light:
name: "${friendly_name} ltr390 light"
id: ltr390_light
# filters:
# - sliding_window_moving_average:
# window_size: 12
# send_every: 6
ambient_light:
name: "${friendly_name} ltr390 ambient light"
id: ltr390_ambient_light
resolution: 18
gain: X3
window_correction_factor: 1.0 # wfac
update_interval: 4s
text_sensor:
- platform: version # Expose ESPHome version as sensor.
name: $esphome_name ESPHome Version
hide_timestamp: false
- platform: wifi_info
ip_address:
name: "$esphome_name IP"
ssid:
name: "$esphome_name SSID"
bssid:
name: "$esphome_name BSSID"
- platform: template
name: "${friendly_name} wind cardinal direction"
id: wind_dir_card
- platform: template
name: '${friendly_name} Beaufort wind scale'
icon: 'mdi:tailwind'
id: wind_scale
update_interval: never
- platform: template
name: '${friendly_name} Beaufort wind scale code'
icon: 'mdi:tailwind'
id: wind_scale_code
display:
- platform: ssd1306_i2c
model: "SSD1306 128x64"
address: 0x3C
lambda: |-
// Print the string "Weather Station" at [1,11]
//it.print(0, 10, id(roboto), "Weather Station");
if (id(bme280_temperature).has_state()) {
it.printf(0, 0, id(roboto), "%.1f°", id(bme280_temperature).state);
}
if (id(bme280_humidity).has_state()) {
it.printf(35, 0, id(roboto), "%.1f %%", id(bme280_humidity).state);
}
if (id(bme280_pressure).has_state()) {
it.printf(70, 0, id(roboto), "%.2f kpa", id(bme280_pressure).state);
}
if (id(wind_speed_voltage).has_state()) {
it.printf(0, 13, id(roboto), "%.2f V-1", id(wind_speed_voltage).state);
}
if (id(wind_direction_voltage).has_state()) {
it.printf(0, 25, id(roboto), "%.2f V-2", id(wind_direction_voltage).state);
it.printf(54, 25, id(roboto), "%.1f", id(wind_heading).state);
it.printf(90, 25, id(roboto), "%s", id(wind_dir_card).state.c_str());
}
if (id(wind_speed_kmh_avg).has_state()) {
it.printf(0, 38, id(roboto), "%.2f V-2", id(wind_speed_kmh_avg).state);
it.printf(54, 38, id(roboto), "%.1f", id(wind_scale_code).state);
it.printf(90, 38, id(roboto), "%s", id(wind_scale).state.c_str());
}
# if (id(dht_temperature).has_state()) {
# it.printf(0, 51, id(roboto), "%.1f°", id(dht_temperature).state);
# }
# if (id(battery_voltage).has_state()) {
# it.printf(0, 47, id(roboto), "%.1f V", id(battery_voltage).state);
# }
font:
- file: "fonts/Roboto-Regular.ttf"
id: my_font
size: 10
# gfonts://family[@weight]
- file: "gfonts://Roboto"
id: roboto
size: 10
- file:
type: gfonts
family: Roboto
weight: 900
id: font2
size: 10
This might be why your dallas component is not working:
dallas:
pin:
number: 27
inverted: true
mode:
input: true
output: true
Should only be:
dallas:
pin:
number: 27
There should also be a 4K7 pull-up resistor to 3.3V on this GPIO.
Did your GPIO13 binary sensor work?
this i how it was, and yes, with a 4k7 pull-up from signal to 3V3 and GPIO.
after your advise regarding digging gpio binary sensor, i tried the conf with input, output… nothing is working.
gpio13 did not work either. from gpio 13 to gnd voltmeter shows 4V2.
?
It’s an input.
Short it to 3.3v and it should turn on. Short it to GND and it should turn off.
Floating it could be anything.