Need help with ESPHome, binary sensor, and NodeMCU ESP32

ESPHome
1

Hello, I purchased https://www.amazon.com/gp/product/B0718T232Z

I connected GPIO13 to 3.3v using 2.2k resistor as it shown here:
image

I am trying to setup binary sensor for my door. This is the configuration that I use:

esphome:
  name: ring_and_salt_system
  platform: ESP32
  board: nodemcu-32s

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

captive_portal:

# Enable logging
logger:
  baud_rate: 0

uart:
  rx_pin: RX
  baud_rate: 4800

# Enable Home Assistant API
api:

ota:

binary_sensor:
  - platform: gpio
    pin:
      number: GPIO13
      mode: INPUT_PULLUP
      inverted: True
    name: "Front Door"
    device_class: door

It does not work for me. It always show that the door is closed.
Can someone help me with this?

2

From your wiring picture and the fact that you have internal pull-ups enabled, your GPIO pin will always be at 3.3v. Pull-up is at 3.3v and your switch connects it to 3.3v when closed.

Remove the external GPIO resistor.

Re-wire your door switch to short the the GPIO to GND.

Leave the configuration of esphome as you have it. It is correct.

1 Like
3

This is correct, switch should go to ground , not 3.3v.

4

Basically, you are telling me that GPIO should have either GND or 3.3V connection, is this correct? I tried it too and it is always closed.

I use solderless breadboard and move cable that is connected to GPIO13 between GND and 3.3V connections, but status does not change.

Anything else should I try? I watched this video and it says that I have to have resistor: https://www.youtube.com/watch?v=c0tMGlJVmkw

5

Then you have the wrong pin.

I didn’t watch it but they’re wrong. Enabling pull-ups does the same thing as an external resistor (all be it a lot weaker).

6

Interesting. It started working. I removed connection to 3.3v and connect GPIO pin to GND pin only.

Basically, GPIO pin either connected to GND or not. Nothing else. Is it normal? Can I leave it like this?

Thank you for your help.

7

Yes. That is exactly what I said in my last post.

8

Sorry but f I wanted to be sure because that video tells me that I have to have connection to 3.3V.

Again, thank you very much for your help.

1 Like
9

Don’t believe everything you read - or watch on YouTube :slight_smile:

10

hi, gays, i have a problem similar to that i have a door sensor i connect it to gnd then to the door sensor, and to d1 but when it changes from on to off it gets stuck on off.
but when i use the same code and wiring for rx or tx pin its works properly

captive_portal:

binary_sensor:

  - platform: gpio

    name: "test1"

    pin:

      number: 10

    id: test_1