Why am I getting Log Output on my ESP32-S2 Soft UART?

ESPHome
1

I have defined a “soft uart” to interface with “Device X”. However, it seems that during the ESP32-S2 startup, I am getting unexpected output on this UART? This is my YAML:

esphome:
  name: esp32-s2
  friendly_name: ESP32-s2
  

esp32:
  board: lolin_s2_mini #esp32-s2-saola-1
  framework:
    type: arduino

# Enable logging
logger:
  #hardware_uart: USB_CDC # TX=19, RX=20 (via USB connector)
  #hardware_uart: UART0 # TX=43, RX=44 (pins not brought to edge connectors) 
  hardware_uart: UART1 # TX=17, RX=18
  level: VERBOSE
  #logs:
  #  WiFiGeneric.cpp: NONE

# Enable Home Assistant API
api:
  
ota:
  id: my_ota_pw
  password: !secret ota_password
  

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

captive_portal:

uart:
  - id: my_uart
    tx_pin: GPIO37 #marked as 37 on WeMOS S2 board
    rx_pin: GPIO39 #marked as 39 on WeMOS S2 Board
    baud_rate: 115200
    stop_bits: 1
    parity: none

time:
  - platform: sntp
    on_time:
      - seconds: /5
        then:
         - uart.write:
            id: my_uart
            data: "\n\rhello world"

… and this is the output on my soft uart (my_uart):

[206810][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SS8
[206811][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_D
[206818][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 8 - ASSOC_LEAVE
[206826][V][WiFiGeneric.cpp:341] _arduino_event_cb(): STA Stopped
[206830][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 3 - STA_P
[  1075][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFIY
[  1112][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
[  1113][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_T
[  7142][V][WiFiGeneric.cpp:381] _arduino_event_cb(): SCAN Done9
[  7142][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 1 - SCANE
[  8876][V][WiFiGeneric.cpp:353] _arduino_event_cb(): STA ConneK
[  8877][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 4 - STA_D
[  9859][V][WiFiGeneric.cpp:367] _arduino_event_cb(): STA Got New IP:192.10
[  9859][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 7 - STA_P
[  9862][D][WiFiGeneric.cpp:991] _eventCallback(): STA IP: 192.168.0.80, M1

hello world
hello world
hello world
hello world
test string continues...

Any suggestions on how to stop this unwanted output because it is sending “Device X” into a very confused state!
Regards, Martin

2

Do you actually need an uart logger?
If not, just disable it with:

logger:
  baud_rate: 0
3

No I don’t NEED a uart logger. But it is useful sometimes. And I think the log output should be on UART1 not on my_uart.
However, I did try the baud_rate: 0. But I still get the spurious output on the soft uart!
And what sort of log information is it anyway? Compiler output?
Regards, M.

4

Good question. I’ve never seen those, either.

5

Maybe it’s possible to suppress that one component.

logger:
  level: DEBUG
  logs:
    WiFiGeneric.cpp: NONE
6

Nope. Tried that. See sample YAML (although it is Rem’d out)

Regards, M.

1 Like
7

I see now lol

Did you try any variations like WIFi.component or WiFiGeneric.component

8

No?
But I have now… And no luck :frowning_face: