ESP32-C3_Supermini with LD2420 v2.1 Not Working - UART Fail

ESPHome
1

Hi everyone, need help troubleshoot an fix the issue where I am not able to make LD2420 v2.1 work with ESP32-C3-Supermini and ESPHOME. I connected the TX and RX pins correctly and ran a test program also using Arduino IDE to check if sensor is good. the sensor responds and sends RAW data when connected and flashed with Arduino IDE HardwareSerial.

However, when i upload the firmware from ESPHome, it says,

[20:03:53][VV][esp32.preferences:071]: nvs_get_blob: key: 233825507, len: 4
[20:03:53][C][safe_mode:079]: There have been 1 suspected unsuccessful boot attempts
[20:03:53][VV][esp32.preferences:040]: s_pending_save: key: 233825507, len: 4
[20:03:53][D][esp32.preferences:114]: Saving 1 preferences to flash...
[20:03:53][VV][esp32.preferences:123]: Checking if NVS data 233825507 has changed
[20:03:53][V][esp32.preferences:126]: sync: key: 233825507, len: 4
[20:03:53][D][esp32.preferences:143]: Saving 1 preferences to flash: 0 cached, 1 written, 0 failed
[20:03:53][I][app:029]: Running through setup()...
[20:03:53][V][app:030]: Sorting components by setup priority...
[20:03:53][VV][scheduler:063]: set_interval(name='', interval=60000, offset=14055)
[20:03:53][C][uart.arduino_esp32:077]: Setting up UART...
[20:03:53][C][ld2420:114]: Setting up LD2420...
[20:03:53][D][ld2420:564]: Sending set config enable command: FF
[20:03:56][E][ld2420:116]: LD2420 module has failed to respond, check baud rate and serial connections.
[20:03:56][E][component:119]: Component ld2420 was marked as failed.
[20:03:56][E][component:164]: Component ld2420 set Error flag: unspecified
[20:03:56][C][wifi:047]: Setting up WiFi...
[20:03:56][C][wifi:060]: Starting WiFi...
[20:03:56][C][wifi:061]: Local MAC: D8:3B:DA:34:B0:90
[20:03:56][V][esp32.preferences:059]: nvs_get_blob('3685851552'): ESP_ERR_NVS_NOT_FOUND - the key might not be set yet
[20:03:56][V][wifi_esp32:066]: Enabling STA.
[20:03:56][ 3193][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFI_READY
[20:03:56][V][wifi_esp32:485][arduino_events]: Event: WiFi ready
[20:03:56][ 3225][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
[20:03:56][ 3226][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_START
[20:03:56][V][wifi_esp32:496][arduino_events]: Event: WiFi STA start
[20:03:56][W][wifi_esp32:500][arduino_events]: esp_netif_set_hostname failed: ESP_ERR_INVALID_ARG
[20:03:56][D][wifi:481]: Starting scan...
[20:03:56][VV][scheduler:226]: Running interval '' with interval=60000 last_execution=4294893425 (now=3238)
[20:03:56][W][component:157]: Component wifi set Warning flag: scanning for networks

And I tried other pins also UART1 and UART0 both but same error. here’s my ESPHome YAML code.

esphome:
  name: bedroompresencedetection
  friendly_name: BedroomPresenceDetection

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


# Enable logging
logger:
  level: VERY_VERBOSE

# Enable Home Assistant API
api:
  encryption:
    key: "Vrl8Pf0RMKFf+E="

ota:
  - platform: esphome
    password: "25e4a3c3a496aa1"

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

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Bedroompresencedetection"
    password: "nbdjkhgfhgd877hdfb7"

captive_portal:

uart:
  id: ubus
  tx_pin: GPIO21  # Change based on your wiring
  rx_pin: GPIO20  # Change based on your wiring
  baud_rate: 115200  # Use 256000 for firmware < v1.5.3
  parity: NONE
  stop_bits: 1   


ld2420:

text_sensor:
  - platform: ld2420
    fw_version:
      name: LD2420 Firmware
sensor:
  - platform: ld2420
    moving_distance:
      name: "Moving Distance"
      id: moving_distance

select:
  - platform: ld2420
    operating_mode:
      name: "Operating Mode"

number:
  - platform: ld2420
    presence_timeout:
      name: "Detection Presence Timeout"
    min_gate_distance:
      name: "Detection Gate Minimum"
    max_gate_distance:
      name: "Detection Gate Maximum"
    gate_select:
      name: "Select Gate to Set"
    still_threshold:
      name: "Set Still Threshold Value"
    move_threshold:
      name: "Set Move Threshold Value"
    gate_move_sensitivity:
      name: "Move Calibration Sensitivity Factor"
    gate_still_sensitivity:
      name: "Still Calibration Sensitivity Factor"

button:
  - platform: ld2420
    apply_config:
      name: "Apply Config"
    factory_reset:
      name: "Factory Reset"
    restart_module:
      name: "Restart Module"
    revert_config:
      name: "Undo Edits"
2

You could try setting the baud_rate of the logger component to 0 see if the logger is interfering with.

3

I could not get it to work with gpio 20 and 21, on an esp32-c3, no matter what I tried. Switching to gpio 6 and 7 worked though.

1 Like
4

It worked for me with the following configuration

esphome:
  name: presencia-despacho
  friendly_name: Presencia Despacho

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

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: !secret api_key_presencia

ota:
  - platform: esphome
    password: !secret ota_presencia

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  fast_connect: True
  power_save_mode: NONE
  manual_ip: 
    static_ip: 192.168.1.28
    gateway: 192.168.1.1
    subnet: 255.255.255.0

captive_portal:

uart:
  id: ubus
  tx_pin: GPIO20  # Change based on your wiring
  rx_pin: GPIO21  # Change based on your wiring
  baud_rate: 115200  # Use 256000 for firmware < v1.5.3
  parity: NONE
  stop_bits: 1   


ld2420:

text_sensor:
  - platform: ld2420
    fw_version:
      name: LD2420 Firmware

sensor:
  - platform: ld2420
    moving_distance:
      name : Moving Distance

binary_sensor:
  - platform: ld2420
    has_target:
      name: Presence

select:
  - platform: ld2420
    operating_mode:
      name: Operating Mode

number:
  - platform: ld2420
    presence_timeout:
      name: Detection Presence Timeout
    min_gate_distance:
      name: Detection Gate Minimum
    max_gate_distance:
      name: Detection Gate Maximum
    # See "Number" section below for detail
    gate_select:
      name: Select Gate to Set
    still_threshold:
      name: Set Still Threshold Value
    move_threshold:
      name: Set Move Threshold Value

button:
  - platform: ld2420
    apply_config:
      name: Apply Config
    factory_reset:
      name: Factory Reset
    restart_module:
      name: Restart Module
    revert_config:
      name: Undo Edits
5

This sensor is garbage. I just bricked three of them trying to calibrate them. my f/w is 1.5.6 and the sequence used was calibrate > apply config > restart module. After about third cycle, it stops responding even after full reboots.

6

clear

127 / 5.000

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I built two that have firmware v1.6.1 and have had them running for 2 months without any issues. Here is a link to my github: https://github.com/JVRMTS/Detectores__Presencia_Esp32C_SuperMini_HomeAssistant