RS484 Wind Speed and Wind Direction on the same bus

this is how it is look like:

type: custom:compass-card
header:
 title:
   value: Wind
indicator_sensors:
 - sensor: sensor.YOUR WIND DIRECTION SENSOR
   indicator:
     type: arrow_inward
value_sensors:
 - sensor: sensor.YOUR WIND SPEED SENSOR
compass:
 north:
   show: true
 east:
   show: true
 west:
   show: true
 south:
   show: true
language: hu

sorry made a mistake SENSOR WIND SPEED SEN0483 slave address 2 and RS485 Wind Direction Transmitter SKU SEN0482 slave address 3 :-)

modbus_controller:

  - id: wind_direction_meter

    address: 3  # győződj meg róla, hogy a szenzor címe valóban 1

    modbus_id: modbus1

    command_throttle: 200ms

    update_interval: 1s

  - id: wind_speed_meter

    address: 2  # ← ez a SEN0483 címe

    modbus_id: modbus1

    command_throttle: 220ms

    update_interval: 2s

how to use SEN0483 (address 3) and SEN0482 (address 2) on a same RS485 bus in esphome
esphome:
 name: wind-station
 friendly_name: Wind station

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

logger:
 baud_rate: 0

api:
 encryption:
   key: "system generated"

ota:
 - platform: esphome
   password: "system generated"

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

 ap:
   ssid: "Wind-Station Fallback Hotspot"
   password: "system generated"

captive_portal:

uart:
 id: uart_bus
 tx_pin: GPIO21 # DI
 rx_pin: GPIO20 # RO
 baud_rate: 9600
 stop_bits: 1

modbus:
 id: modbus1
 uart_id: uart_bus
 flow_control_pin: GPIO4  # connect DE/RE to GPIO5 MAX485-M

# Wind direction szenzor beállításai
modbus_controller:
 - id: wind_direction_meter
   address: 3 # ← ez a SEN0482 címe
   modbus_id: modbus1
   command_throttle: 200ms
   update_interval: 1s

 - id: wind_speed_meter
   address: 2  # ← ez a SEN0483 címe
   modbus_id: modbus1
   command_throttle: 220ms
   update_interval: 2s

sensor:
 - platform: modbus_controller
   modbus_controller_id: wind_direction_meter
   name: "Wind direction degree"
   icon: mdi:compass-rose
   register_type: holding
   address: 0
   value_type: U_WORD
   accuracy_decimals: 0
   unit_of_measurement: "°"
   state_class: measurement
   filters:
     - multiply: 0.1

 - platform: modbus_controller
   id: Wind_direction_gear
   modbus_controller_id: wind_direction_meter
   name: "Wind direction gear"
   register_type: holding
   address: 1       # égtáj kód regisztere (0-7)
   value_type: U_WORD
   icon: mdi:compass
   state_class: measurement

 - platform: modbus_controller
   modbus_controller_id: wind_speed_meter
   name: "Szélsebesség"
   register_type: holding
   address: 0
   value_type: U_WORD  # 32 bites float, két regisztert olvas: 0 és 1
   unit_of_measurement: "m/s"
   accuracy_decimals: 1
   state_class: measurement
   icon: mdi:weather-windy

   update_interval: 1s

this is how to use RS485 Wind Direction Transmitter SKU SEN0482 and SENSOR WIND SPEED SEN0483 on a same RS485 bus in home assistant
i used ESP32-C3 + MAX485-M 

// hi Guys,  this is working… changed RS485 Wind Direction Transmitter SKU SEN0482 slave address from 2 to 3 few minutes ago have fun :-)

#include <SoftwareSerial.h>

// ---------------------------------------
// SoftwareSerial beállítások (RS485, auto-direction)
// Arduino UNO + Bestep rs485_ttl (or similar)
// ---------------------------------------
// UNO pin 10 ← FT232RL RO   (szenzor → Arduino RX)
// UNO pin 11 → FT232RL DI   (Arduino TX → szenzor)

#define RS485_RX 10
#define RS485_TX 11
SoftwareSerial rs485(RS485_RX, RS485_TX);

byte address_ref_frame[] = {0x00, 0x10, 0x10, 0x00, 0x00, 0x01, 0x02, 0x00, 0x03, 0xFA, 0x00};
byte buf[11];

void setup(){   
Serial.begin(9600);   
Serial.println("Serial started");
rs485.begin(9600);

Serial.println("-----------------------------------------------");    
Serial.println("Send");   
delay(1000);   
rs485.write(address_ref_frame, sizeof(address_ref_frame));   
rs485.flush();   
rs485.readBytes(buf, 11);   
delay(1000);

Serial.println("Buffer");   
Serial.println(buf[0], HEX);   
Serial.println(buf[1], HEX);   
Serial.println(buf[2], HEX);   
Serial.println(buf[3], HEX);   
Serial.println(buf[4], HEX);   
Serial.println(buf[5], HEX);   
Serial.println(buf[6], HEX);   
Serial.println(buf[7], HEX);   
Serial.println(buf[8], HEX);   
Serial.println(buf[9], HEX);   
Serial.println(buf[10], HEX);   
Serial.println(buf[11], HEX);      
Serial.flush();

}

void loop(){
  
}

@Isidro.NavarroMaybe to late for you.You can write onmy one sketch, include both libraries and read both sensors.But first, you have to chand the address of at least one of them, so that you have 2 different addresses on the ModBus.

HI,I bought 2 wind sensors from another seller, they look very similar to those sold by DFROBOT.

The commands are the same, I am indeed able to read both using the default address.

But even if the command for changing the address seems to be accepted (the sensor answers correctly), no address change is done.Does anyone have a clue why this could happen ?

Thanks,

HI,

Interesting post, as I'm to buy both wind speed and direction sensors. 

Does the device keep the modified address or does it have to be reconfigured at each startup ?

Thanks,

Hi! Please modify the check digit of the command: 03 03 00 00 00 01 85 E8

Hi,

I am having a hard time reading the sensor after changing the address. I also cant change the address to anything other than slave address =0x03. When I use address =0x03 I get the slave response 00 10 10 00 00 01 04 D8 as expected according to the documentation. Indicating that the modification was successful. However now I cant read wind direction data.

I changed the reference frame to the new address.  {0x03, 0x03, 0x00, 0x00, 0x00, 0x01, 0x84, 0x39}

Before I attempted to change the address and I was using {0x02, 0x03, 0x00, 0x00, 0x00, 0x01, 0x84, 0x39}; it was working well.

Please find the code that I am using to change the address  below:

byte address_ref_frame[] = {0x00, 0x10, 0x10, 0x00, 0x00, 0x01, 0x02, 0x00, 0x03, 0xFA, 0x00};byte buf[11];

void setup(){   Serial.begin(9600);   Serial.println("Start");}

void loop(){//    Serial.println("-----------------------------------------------");//    //    Serial.println("Send");   delay(1000);   Serial.write(address_ref_frame, sizeof(address_ref_frame));   Serial.flush();   Serial.readBytes(buf, 11);   delay(1000);

   Serial.println("Buffer");   Serial.println(buf[0], HEX);   Serial.println(buf[1], HEX);   Serial.println(buf[2], HEX);   Serial.println(buf[3], HEX);   Serial.println(buf[4], HEX);   Serial.println(buf[5], HEX);   Serial.println(buf[6], HEX);   Serial.println(buf[7], HEX);   Serial.println(buf[8], HEX);   Serial.println(buf[9], HEX);   Serial.println(buf[10], HEX);   Serial.println(buf[11], HEX);      Serial.flush();   delay (600000);}

Please find the code that I am using to read the sensor  below:

byte wind_direction_ref_frame[] = {0x03, 0x03, 0x00, 0x00, 0x00, 0x01, 0x84, 0x39};byte buf[8];int wind_direction;static const char *direction_list[] = {"North", "Northeast by North", "Northeast", "Northeast by East", "East", "Southeast by East", "Southeast", "Southeast by South", "South", "Southwest by South", "Southwest", "Southwest by West", "West", "Northwest by West", "Northwest", "Northwest by North", "Invalid reading"};  

void setup(){   Serial.begin(9600);   Serial.println("Start");}

void loop(){

   Serial.println("-----------------------------------------------");   Serial.println("Sending read request");   delay(2000);   Serial.write(wind_direction_ref_frame, sizeof(wind_direction_ref_frame));   Serial.flush();   Serial.readBytes(buf, 8);   delay(1000);

   wind_direction = buf[3], DEC;   Serial.println("");   Serial.print("Wind Direction: ");   Serial.println(direction_list[wind_direction]);

   Serial.println("Buffer");   Serial.println(buf[0], HEX);   Serial.println(buf[1], HEX);   Serial.println(buf[2], HEX);   Serial.print(buf[3], HEX);   Serial.println(" !");   Serial.println(buf[4], HEX);   Serial.println(buf[5], HEX);   Serial.println(buf[6], HEX);

   Serial.flush();   delay (3000);}

Many thanks

Hi,

you may have found the answer already, anyway:

yes, you have to send once the command to change the address of the RS485 device. Per default, they are both set to address = 0x02. You can connect either of the two and send to slave address 0x00 = (broadcast to all devices) the command to change the address (0x00 0x10 0x10 0x00 0x00 0x01 0x02 0x00 0x03 0xFA 0x00 sets slave address =0x03).  Afterwards, you can connect both again and command them individually with the set slave address (in this example on would be 0x02, the other 0x03). Its is also described in the wiki.