Pull up on A8 - Printable Version

Pull up on A8 - Printable Version

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+--- Thread: Pull up on A8 (/showthread.php?tid=7492)

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Pull up on A8 - heffneil - 01-27-2025

I am using ESPHome and I am seeing a lot of problems with the floating input. Can someone tell me if I can specify pullup? I tried with esphome normally and it doesn't like it so I am stuck?

RE: Pull up on A8 - admin - 01-27-2025

which port you are using? take a photo. because the 1-wire ports, it already have pull up resistance on PCB.

RE: Pull up on A8 - heffneil - 01-28-2025

I am using the ports directly to the right of the power input:

picture here:

https://imgur.com/a/FLl1CRC

RE: Pull up on A8 - admin - 01-28-2025

[Image: KC868-A8-1_03.jpg]

see this photo. S1, S2, S3, S4 ports all have pull up resistance on PCB.

RE: Pull up on A8 - heffneil - 01-28-2025

(01-28-2025, 01:01 AM)admin Wrote:
see this photo. S1, S2, S3, S4 ports all have pull up resistance on PCB.

But I am using the inputs on the top left ground to input off the one chip

[color=oklab(0.89908 -0.00192907 -0.0048306)] - platform: gpio
name: "Water Closet Door Sensor"
pin:
pcf8574: pcf8574_hub_in_1
number: 1
mode: INPUT
filters:
- delayed_on: 0.5s[/color]

Do these have pull up resistors? I am seeing significant bouncing?

RE: Pull up on A8 - admin - 01-28-2025

digital input ports ONLY use for dry contact signal.
they are without pull up resistors, because of they not connect with ESP32's pin directly, there are PCF8574 chip's pin.

RE: Pull up on A8 - heffneil - 01-28-2025

I am sorry I don't understand what you are saying. Are you saying I need pull up resistors?

RE: Pull up on A8 - admin - 01-28-2025

(01-28-2025, 01:15 AM)heffneil Wrote:
(01-28-2025, 01:01 AM)admin Wrote:
see this photo. S1, S2, S3, S4 ports all have pull up resistance on PCB.

But I am using the inputs on the top left ground to input off the one chip

[color=oklab(0.89908 -0.00192907 -0.0048306)] - platform: gpio
name: "Water Closet Door Sensor"
pin:
pcf8574: pcf8574_hub_in_1
number: 1
mode: INPUT
filters:
- delayed_on: 0.5s[/color]

Do these have pull up resistors? I am seeing significant bouncing?

these port can't use pull up resistor. they are not connect with ESP32 pin directly. i suggest you test with S1,S2,S3 or S4 port.

RE: Pull up on A8 - heffneil - 01-28-2025

(01-28-2025, 01:30 PM)admin Wrote:
(01-28-2025, 01:15 AM)heffneil Wrote:
(01-28-2025, 01:01 AM)admin Wrote:
see this photo. S1, S2, S3, S4 ports all have pull up resistance on PCB.

But I am using the inputs on the top left ground to input off the one chip

[color=oklab(0.89908 -0.00192907 -0.0048306)] - platform: gpio
name: "Water Closet Door Sensor"
pin:
pcf8574: pcf8574_hub_in_1
number: 1
mode: INPUT
filters:
- delayed_on: 0.5s[/color]

Do these have pull up resistors? I am seeing significant bouncing?

these port can't use pull up resistor. they are not connect with ESP32 pin directly. i suggest you test with S1,S2,S3 or S4 port.

RE: Pull up on A8 - heffneil - 01-29-2025

what are these ports typically used for? This is closed contact testing and shouldnt flap.