AM2302 only works after hard power cycle

chrismetcalf commented 2 years ago

The problem

I have a handfull of AM2302/DH22 sensors wired up to ESP01 boards around my house. They work great after a hard power cycle (remove USB power and plug back in) but after awhile, or after I do an esphome run to upload an updated program over OTA, they start reporting:

[00:11:21][W][dht:167]: Requesting data from DHT failed!
[00:11:21][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number).
[00:11:21][D][sensor:113]: 'Shed Temperature': Sending state nan °C with 1 decimals of accuracy
[00:11:21][D][sensor:113]: 'Shed Humidity': Sending state nan % with 0 decimals of accuracy

I've tried various other options for model but none seem to make a difference. And it works great on first boot. The AM2302s and ESP01 are powered off of 3.3v via a little step-down board.

Which version of ESPHome has the issue?

2021.12.2

What type of installation are you using?

pip

Which version of Home Assistant has the issue?

2021.12.4

What platform are you using?

ESP32

Board

ESP01

Component causing the issue

AM2302

Example YAML snippet

## ESP01 Temperature Sensor
#
# Connections:
# - 5V PWR -> Conv VIN 
# - 5V GND -> Conv GND -> AM2302 - -> ESP GND
# - Conv VOUT (3.3v) -> ESP VCC -> AMC2302 +
# - ESP VCC -> 10K resistor -> ESP CHPD
# - ESP GP2 -> AM2302 Middle
# - 
esphome:
  name: shed-temp
  platform: ESP8266
  board: esp01_1m

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

  # # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "shed-temp-fallback"
    password: !secret esphome_password

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: !secret esphome_password

ota:
  password: !secret esphome_password

web_server:
  port: 80

sensor:
  - platform: dht
    pin: GPIO2
    model: AM2302
    temperature:
      name: Shed Temperature
      force_update: true
      filters:
        - offset: -2.0667
    humidity:
      name: Shed Humidity
      force_update: true

  - platform: uptime
    name: Shed ESP Uptime

  - platform: wifi_signal
    name: Shed ESP Signal Strength

text_sensor:
  - platform: wifi_info
    ip_address:
      name: Shed ESP IP Address

Anything in the logs that might be useful for us?

~/src/github.com/esphome(master*) » esphome run shed-temp.yaml
INFO Reading configuration shed-temp.yaml...
INFO Generating C++ source...
INFO Compiling app...
*********************************************************************************************************************************
Obsolete PIO Core v5.2.2 is used (previous was 5.2.4)
Please remove multiple PIO Cores from a system:
https://docs.platformio.org/page/faq.html#multiple-platformio-cores-in-a-system
*********************************************************************************************************************************
Processing shed-temp (board: esp01_1m; framework: arduino; platform: platformio/espressif8266 @ 2.6.3)
---------------------------------------------------------------------------------------------------------------------------------
HARDWARE: ESP8266 80MHz, 80KB RAM, 1MB Flash
Dependency Graph
|-- <ESPAsyncTCP-esphome> 1.2.3
|-- <ESPAsyncWebServer-esphome> 2.1.0
|   |-- <ESPAsyncTCP-esphome> 1.2.3
|   |-- <Hash> 1.0
|   |-- <ESP8266WiFi> 1.0
|-- <DNSServer> 1.1.1
|-- <ESP8266WiFi> 1.0
|-- <ArduinoJson-esphomelib> 5.13.3
|-- <ESP8266mDNS> 1.2
Compiling .pioenvs/shed-temp/src/main.cpp.o
Linking .pioenvs/shed-temp/firmware.elf
Building .pioenvs/shed-temp/firmware.bin
RAM:   [====      ]  39.4% (used 32240 bytes from 81920 bytes)
Flash: [====      ]  41.8% (used 427656 bytes from 1023984 bytes)
================================================= [SUCCESS] Took 10.81 seconds =================================================
INFO Successfully compiled program.
INFO Resolving IP address of shed-temp.local
INFO  -> 192.168.1.206
INFO Uploading .esphome/build/shed-temp/.pioenvs/shed-temp/firmware.bin (431808 bytes)
INFO Compressed to 298869 bytes
Uploading: [============================================================] 100% Done...

INFO Waiting for result...
INFO OTA successful
INFO Successfully uploaded program.
INFO Starting log output from shed-temp.local using esphome API
INFO Successfully connected to shed-temp.local
[00:07:51][I][app:102]: ESPHome version 2021.12.2 compiled on Dec 29 2021, 00:07:15
[00:07:51][C][dht:017]: DHT:
[00:07:51][C][dht:018]:   Pin: GPIO2
[00:07:51][C][dht:024]:   Model: DHT22 (or equivalent)
[00:07:51][C][dht:027]:   Update Interval: 60.0s
[00:07:51][C][dht:029]:   Temperature 'Shed Temperature'
[00:07:51][C][dht:029]:     Device Class: 'temperature'
[00:07:51][C][dht:029]:     State Class: 'measurement'
[00:07:51][C][dht:029]:     Unit of Measurement: '°C'
[00:07:51][C][dht:029]:     Accuracy Decimals: 1
[00:07:51][C][dht:030]:   Humidity 'Shed Humidity'
[00:07:51][C][dht:030]:     Device Class: 'humidity'
[00:07:51][C][dht:030]:     State Class: 'measurement'
[00:07:51][C][dht:030]:     Unit of Measurement: '%'
[00:07:51][C][dht:030]:     Accuracy Decimals: 0
...
[00:08:21][W][dht:167]: Requesting data from DHT failed!
[00:08:21][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number).
[00:08:21][D][sensor:113]: 'Shed Temperature': Sending state nan °C with 1 decimals of accuracy
[00:08:21][D][sensor:113]: 'Shed Humidity': Sending state nan % with 0 decimals of accuracy

Additional information

No response

Weissnix4711 commented 2 years ago

Same here. Had the issue for a while now, but just kinda forgot about it.

My logs:

[20:37:04][I][app:102]: ESPHome version 2021.12.2 compiled on Dec 26 2021, 10:33:51
---
[20:37:04][C][dht:017]: DHT:
[20:37:04][C][dht:018]:   Pin: GPIO4
[20:37:04][C][dht:024]:   Model: DHT22 (or equivalent)
[20:37:04][C][dht:027]:   Update Interval: 60.0s
[20:37:04][C][dht:029]:   Temperature 'Bathroom Temperature'
[20:37:04][C][dht:029]:     Device Class: 'temperature'
[20:37:04][C][dht:029]:     State Class: 'measurement'
[20:37:04][C][dht:029]:     Unit of Measurement: '°C'
[20:37:04][C][dht:029]:     Accuracy Decimals: 1
[20:37:04][C][dht:030]:   Humidity 'Bathroom Humidity'
[20:37:04][C][dht:030]:     Device Class: 'humidity'
[20:37:04][C][dht:030]:     State Class: 'measurement'
[20:37:04][C][dht:030]:     Unit of Measurement: '%'
[20:37:04][C][dht:030]:     Accuracy Decimals: 0
---
[20:37:45][W][dht:167]: Requesting data from DHT failed!
[20:37:45][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number).
[20:37:45][D][sensor:113]: 'Bathroom Temperature': Sending state nan °C with 1 decimals of accuracy
[20:37:45][D][sensor:113]: 'Bathroom Humidity': Sending state nan % with 0 decimals of accuracy

Also running the AM2302 off 3v3, with a 4k7 resistor between data and 3v3.

In previous versions of ESPHome, I've had the same issue, but I'd occasionally get a different error.

[11:26:41][W][dht:167]: Falling edge for bit 40 failed!
[11:26:41][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number).

Edit: #2553 might be relevant

probot-esphome[bot] commented 2 years ago

Hey there @ottowinter, mind taking a look at this issue as it has been labeled with an integration (dht) you are listed as a code owner for? Thanks! _{^{(message by CodeOwnersMention)}}

D130 commented 2 years ago

Had the same problem Resolved by using GPIO3 not GPIO2 Works a treat now

sensor:

platform: dht model: DHT22_TYPE2 pin: GPIO3 temperature: name: "Hot Water Tank Temperature" force_update: true update_interval: 60s

esphome / issues