Anyone had trouble with a LTR390-UV sensor and later model ESP32S3's

ESPHome
1

Hi,

I’m having some issues getting a LTR390-UV sensor working with a XIAO ESP32S3 card.

image
image1394×476 116 KB

The problem occurs after I upload a configuration yaml to enable the sensor (see below). The device drops on and off the API and I am unable to view logs, see whats up.

i2c:
  sda: GPIO5
  scl: GPIO6
  scan: true

sensor:
  - platform: ltr390
    uv_index:
      name: "UV Index"
      id: uv_sensor_uv_index
    light:
      name: "Ambient Light"
      id: uv_sensor_ambient_light
    gain: "X3"
    resolution: 18
    window_correction_factor: 1.0
    update_interval: 1s

i’ve tried setting a bus id (ESPs have two). no banana.

any thoughts?

2

In the diagram you posted the gpios are sda<->6 scl<->7

In your code you have sda<->5 scl<->6

3

yes, apologies, i had seen that error. this is what i have currently:

i2c:
    id: bus_a
    sda: GPIO6
    scl: GPIO7
    scan: true

sensor:
  - platform: ltr390
    uv:
      name: "UV Index"
    light:
      name: "Light"

i’m thinking it might be because i’m not using the ‘absolute’ board type in my YAML, just the generic one. there is a work around i haven’t implemented.

board: esp32-s3-devkitc-1

either-way, its dropping off the API when i try to upload a new config.

this issue:

4

The issue is the lack of support in ESPHome with the XIAO ESP32S3. I’m rebuilding with an ESP32ThingPlus.