DHT22 - Sensor not working - Socket operation failed: HANDSHAKESTATE_READ_FAILED errno=11

ESPHome
1

Hi, my DHT22 Sensor not working - getting the below error message

Code
"

sensor:

  • platform: dht
    pin: 3
    temperature:
    name: “Living Room Temperature”
    humidity:
    name: “Living Room Humidity”
    update_interval: 60s
    "

Error Message

option.
[18:11:45][D][sensor:094]: ‘Living Room Temperature’: Sending state nan °C with 1 decimals of accuracy
[18:11:45][D][sensor:094]: ‘Living Room Humidity’: Sending state nan % with 0 decimals of accuracy
[18:12:11][D][api:102]: Accepted 192.168.1.13
[18:12:11][W][api.connection:083]: 192.168.1.13: Socket operation failed: HANDSHAKESTATE_READ_FAILED errno=11
[18:12:45][W][dht:169]: Requesting data from DHT failed!
[18:12:45][W][dht:060]: Invalid readings! Please check your wiring (pull-up resistor, pin number) and consider manually specifying the DHT model using the model option.
[18:12:45][D][sensor:094]: ‘Living Room Temperature’: Sending state nan °C with 1 decimals of accuracy
[18:12:45][D][sensor:094]: ‘Living Room Humidity’: Sending state nan % with 0 decimals of accuracy
[18:12:47][I][ota:117]: Boot seems successful, resetting boot loop counter.
[18:12:47][D][esp32.preferences:114]: Saving 1 preferences to flash…
[18:12:47][D][esp32.preferences:143]: Saving 1 preferences to flash: 0 cached, 1 written, 0 failed
[18:13:11][D][api:102]: Accepted 192.168.1.13
[18:13:11][W][api.connection:083]: 192.168.1.13: Socket operation failed: HANDSHAKESTATE_READ_FAILED errno=11

wire connection
Capture

2

Looks like you need a pull up resistor, That’s something like 4k7 or 10k from signal to VCC.

1 Like
4

Could you please confirm on which PIN (sensor) i need to put the resistor on ?

5

It needs to be connected between the pins on the sensor. This can be done either where it is connected to.the esp or directly on the sensor. So gpio3 to vcc.

1 Like
6

okay, i will put the 10k resistor Gpio3 to vcc and do the testing again. will get back
Thanks suggestion

7

It’s also in the docs.

IMG_2689
IMG_26891125×1980 319 KB

8

It also tells you in the log line 18:12:45. When ever I get that message just adding a resistor sorts it out. But the easy way is to buy you sensors already mounted on a small board as they have the pull up built in.

9

i have connected the resistor between VCC and Data PIN - this time is got the temperature value but socket error still coming

[15:52:05][C][mdns:116]: Hostname: dht-temperature
[15:52:05][C][ota:097]: Over-The-Air Updates:
[15:52:05][C][ota:098]: Address: dht-temperature.local:3232
[15:52:05][C][ota:101]: Using Password.
[15:52:05][C][api:139]: API Server:
[15:52:05][C][api:140]: Address: dht-temperature.local:6053
[15:52:05][C][api:142]: Using noise encryption: YES
[15:52:31][D][api:102]: Accepted 192.168.1.13
[15:52:31][W][api.connection:092]: : Socket operation failed: HANDSHAKESTATE_READ_FAILED errno=11
[15:52:58][D][dht:048]: Got Temperature=20.8°C Humidity=41.7%
[15:52:58][D][sensor:094]: ‘Living Room Temperature’: Sending state 20.80000 °C with 1 decimals of accuracy
[15:52:58][D][sensor:094]: ‘Living Room Humidity’: Sending state 41.70000 % with 0 decimals of accuracy
[15:53:31][D][api:102]: Accepted 192.168.1.13
[15:53:31][W][api.connection:092]: : Socket operation failed: HANDSHAKESTATE_READ_FAILED errno=11
[15:53:58][D][dht:048]: Got Temperature=20.6°C Humidity=42.3%
[15:53:58][D][sensor:094]: ‘Living Room Temperature’: Sending state 20.60000 °C with 1 decimals of accuracy
[15:53:58][D][sensor:094]: ‘Living Room Humidity’: Sending state 42.30000 % with 0 decimals of accuracy
[15:54:31][D][api:102]: Accepted 192.168.1.13
[15:54:31][W][api.connection:092]: : Socket operation failed: HANDSHAKESTATE_READ_FAILED errno=11
[15:54:58][D][dht:048]: Got Temperature=20.5°C Humidity=42.0%

10

In my experience, just reboot and that will disappear, may take a couple of boots. This is assuming you have set the api in the code and connected that to HA with said API code.

I have just been having this issue with one of my d1 minis Every time I update it it does this fault a few times but settles down soon. I either just leave it for an hour or so before i look again at its output or reboot it a few times.

11

Finally, it working – Socker error will not fix - there might be some bug or compatibility issue
Manually discover the Device in ESPhome with ip add of sensor

Below link i have used for reference
New device won’t show in HA? - ESPHome - Home Assistant Community (home-assistant.io)