ESP32-C3 consumptions and internal temperature peak

[Rihan9]

The problem

Hi all, I'm not sure if here is the correct plate to write about it. I recently bought some devKit for ESP32-C3 (SuperMini version with and without led, you can easily find them on aliexpress) to use them as brain on my multi-sensor device (presence, light, temperature and humidity). I then noticed that the temperature sensor have some strange peaks of temperature and realize that the problem was on the esp board. I remove all the attached sensor, write a simple yaml configuration and let the esp run alone through the night. I didn't solve the issue, so something is strange on the esp itself. I'm posting here* the code and here** the screenshot of the internal temperature monitoring.

I have already tried to change the device. The results showed here are from the second device

I'm going to disable one peripheral at a time and restart the monitoring. I'll post in this issue the results.

*

esphome:
  name: esp32c3-test
  friendly_name: Esp32-C3 Test
  platformio_options:
    board_build.f_cpu: 80000000L

esp32:
  board: esp32-c3-devkitm-1
  framework:
    type: arduino

# Enable logging
logger:
  level: DEBUG

# Enable Home Assistant API
api:
  encryption:
    key: **OMITTED**

ota:
  password: **OMITTED**

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Esp32-C3-Test Fallback Hotspot"
    password: **OMITTED**

captive_portal:

uart:
  id: uart_bus
  rx_pin: 
    number: GPIO20
    mode:
      input: true
      pullup: true
  tx_pin: 
    number: GPIO21
    mode:
      input: true
      pullup: true
  baud_rate: 256000
  parity: NONE
  stop_bits: 1
  data_bits: 8

i2c:
  sda: GPIO10
  scl: GPIO09
  scan: false
  id: bus_a

sensor:
  - platform: internal_temperature
    name: "Internal Temperature"
    entity_category: "diagnostic"

light:
  - platform: status_led
    name: "Status Led"
    pin:
      number: GPIO08
      inverted: true

**

Which version of ESPHome has the issue?

2024.5.5

What type of installation are you using?

Docker

Which version of Home Assistant has the issue?

2024.6.4

What platform are you using?

ESP32

Board

esp32-c3-devkitm-1

Component causing the issue

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

No response

Additional information

No response

[Rihan9]

Hi, I completed the tests with UART and I2C disabled, with the same behavior. I noticed that 2 board with a different start time have the consumption peak at the same hour

[gabest11]

This always helps me. Altough you need to use the esp-idf framework for it.

esp32:
  board: esp32-c3-devkitm-1
  variant: esp32c3
  framework:
    type: esp-idf
    version: recommended
    sdkconfig_options:
      CONFIG_BT_CTRL_MODEM_SLEEP: y

[Rihan9]

I'll check. This is the first time i've changed the framework, so I don't know the impact of this change. I'll do more test if the framework change resolve the issue. Thank.

P.S. I checked if the power_safe_mode for the wifi change this issue but no, some behavior

[Rihan9]

Hi, another consumption/temperature peak registered at 13:35 GMT+2. The config option suggested wasn't the answer.

I start to think that there is some sort of problem on the wifi module, like the router pinging all the devices for some sort of reason or something like this. I don't want to set a sniffer on my entire network, it will be a nightmare, but I don't see anithing in the device log even in VERY VERBOSE debug level.

I'll try to set up a different AP and check this, but the routing table to keep the 2 network separated without losing the monitoring is going to be a problem. I'll update this issue with the results if I find a way to doing it

[Rihan9]

Hi all! The problem seems to be related to my Wi-Fi setup. I used the project esp32_nat_router and it works perfectly. I'll do some other tests to find why this strange behavior, but I'm not an expert in the Wi-Fi protocol. In the screenshot below you can clearly see the moment when I switched the WiFi

[Rihan9]

Hi, I completed my tests using another wifi6 network and the problem exposed in this defect does not accour. I think there is some kind of problem in my router.

The router itself does not have a decent way to debug the problem, so I'm closing this issues because I don't have other tests that can maybe be useful for other people, and the problem is not related tu the Esp32-c3 or ESPHome.

Have a good day!