I made my own Mqtt to speech thingy in the past. Sending a text to a mqtt topic would be picked up by my domoticz raspberry and using a bash script the topic payload was converted to speech and being played on a connected speaker.
LD2410 is a high-sensitivity 24GHz human presence status sensing module developed by Hi-link. Its working principle is to use FMCW frequency-modulated continuous waves to detect human targets in the set space. Combined with radar signal processing and precise human body sensing algorithms, it realizes high-sensitivity human presence status sensing, and can identify human bodies in motion and stationary states. And auxiliary information such as the distance of the target can be calculated.
This product is mainly used in indoor scenes to sense whether there is a moving or micro-moving human body in the area, and output the detection results in real time. The farthest sensing distance can reach 5 meters, and the distance resolution is 0.75m. Provides a visual configuration tool, which can easily configure the sensing distance range, sensing sensitivity in different intervals and unmanned delay time, etc., to adapt to different specific application needs.
Support GPIO and UART output, plug and play, and can be flexibly applied to different smart scenarios and terminal products.
There are 3 versions: Without Bluetooth, with Bluetooth (B version) and a C version which uses the standard pin distance. The other ones are a pain in the *ss to solder!
Got a Bluetooth version? See end of post!
When searching for examples, I noticed that many had issues getting this working. Let me be clear, it wasn’t working for me the first time. Things i’ve learned:
Flash the first initial ESPHome using a USB cable, after that you can connect the module and flash OTA
Do not use the standard Uart RX/TX, it didn’t work for me. And messes-up the logging over USB (See baudrate: 0 to turn this off)
When connecting D7/D8 and this signal gets pulled down, the wemos won’t boot. (Running wifi connections gets interrupted) This is also a sign that RX/TX is switched around!
Measure and make sure you have a good, stable 5V power to your LD2410
Here is a post about the RCWL-0516, a similar project, but this one can’t measure distances and person detection won’t work when a person is not moving.
Parts i’ve changed: board: Changed from esp-1?? to d1_mini logger: baud_rate: 0 tx_pin and rx_pin
esphome:
name: ld2410-1
friendly_name: ld2410-1
esp8266:
board: d1_mini
# Enable logging
logger:
baud_rate: 0
# Enable Home Assistant API
api:
encryption:
key: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx="
ota:
password: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Ld2410-1 Fallback Hotspot"
password: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
captive_portal:
ld2410:
id: ld2410_radar
uart:
tx_pin: GPIO15
rx_pin: GPIO13
baud_rate: 256000
parity: NONE
stop_bits: 1
number:
- platform: ld2410
timeout:
name: Radar Timeout
max_move_distance_gate:
name: Radar Max Move Distance
max_still_distance_gate:
name: Radar Max Still Distance
g0:
move_threshold:
name: g0 move threshold
still_threshold:
name: g0 still threshold
g1:
move_threshold:
name: g1 move threshold
still_threshold:
name: g1 still threshold
g2:
move_threshold:
name: g2 move threshold
still_threshold:
name: g2 still threshold
g3:
move_threshold:
name: g3 move threshold
still_threshold:
name: g3 still threshold
g4:
move_threshold:
name: g4 move threshold
still_threshold:
name: g4 still threshold
g5:
move_threshold:
name: g5 move threshold
still_threshold:
name: g5 still threshold
g6:
move_threshold:
name: g6 move threshold
still_threshold:
name: g6 still threshold
g7:
move_threshold:
name: g7 move threshold
still_threshold:
name: g7 still threshold
g8:
move_threshold:
name: g8 move threshold
still_threshold:
name: g8 still threshold
binary_sensor:
- platform: ld2410
has_target:
name: Radar Target
id: radar_has_target
has_moving_target:
name: Radar Moving Target
has_still_target:
name: Radar Still Target
button:
- platform: ld2410
factory_reset:
name: "factory reset"
restart:
name: "restart"
query_params:
name: query params
sensor:
- platform: ld2410
moving_distance:
name: Radar Moving Distance
id: moving_distance
still_distance:
name: Radar Still Distance
id: still_distance
moving_energy:
name: Radar Move Energy
still_energy:
name: Radar Still Energy
detection_distance:
name: Radar Detection Distance
id: radar_detection_distance
g0:
move_energy:
name: g0 move energy
still_energy:
name: g0 still energy
g1:
move_energy:
name: g1 move energy
still_energy:
name: g1 still energy
g2:
move_energy:
name: g2 move energy
still_energy:
name: g2 still energy
g3:
move_energy:
name: g3 move energy
still_energy:
name: g3 still energy
g4:
move_energy:
name: g4 move energy
still_energy:
name: g4 still energy
g5:
move_energy:
name: g5 move energy
still_energy:
name: g5 still energy
g6:
move_energy:
name: g6 move energy
still_energy:
name: g6 still energy
g7:
move_energy:
name: g7 move energy
still_energy:
name: g7 still energy
g8:
move_energy:
name: g8 move energy
still_energy:
name: g8 still energy
Bluetooth:
I’ve connected this HLK-DL2410B to Home Assistant before using Bluetooth. But I wanted to get them connected using Wifi.
You can install an App on your phone to connect to the sensor when powered on. This way you can test the device, but also upgrade the firmware and make adjustments!
Just enable engineering mode and click more.
Testing another baud rate and upgrading the firmware:
Posted because I could not find a good example on the interwebs.
Below creates a virtual HA button which toggles a blinking led. (button and variables are called eprint for another function, change to something meaningful. )
Home Assistant virtual mqtt switch (configuration.yml)
I’m using domoticz as a 433->mqtt bridge, and some virtual devices i can toggle with curl (bash scripts)
I needed to make a custom 433 door sensor in Home Assistant with toggles to OFF after a few seconds. (There is NO off signal in this cheap sensor i’m using)
I’m changing the payload complete, to have a payload which matches the device class for door: (state with on/off) It was nvalue = 0/1
(Whenever the IDX changes, I only have to update this Nodered part) HA won’t notice the change.
var nvalue = msg.payload.nvalue;
msg.payload = {};
if(nvalue == 1)
{
msg.payload.state = "ON";
return msg;
}
AND after 5 seconds
msg.payload = {};
msg.payload.state = "OFF";
return msg;
