WHAT am i doing wrong - RS485 Modbus

luisn · March 2, 2023, 8:09pm

Ive been at this for over a week with no way of getting data back. I have this little RS485 modbus

and using a ESP32-WROVER board with the following below. maybe i dont have the right register or doc for it? the manufacturer did not send any details so i had to googles it. hopefully its the right one

uart:
 id: mod_bus
 tx_pin: GPIO01
 rx_pin: GPIO03
 baud_rate: 9600
 stop_bits: 1

modbus:
 id: modbus1
 flow_control_pin: 4
 
modbus_controller:
 - id: reader1
   address: 0x01
   modbus_id: modbus1
   setup_priority: -10
   update_interval: 3s

sensor:
  - platform: modbus_controller
    modbus_controller_id: reader1
    name: "soil_meter"
    # id: flow
    register_type: holding
    address: 0x01
    # register_count: 1
    # response_size: 2
    # accuracy_decimals: 3
    value_type: U_WORD
    unit_of_measurement: "VWC"

trying to read from this device

[15:06:54][C][logger:293]: Logger:
[15:06:54][C][logger:294]:   Level: DEBUG
[15:06:54][C][logger:295]:   Log Baud Rate: 0
[15:06:54][C][logger:296]:   Hardware UART: UART0
[15:06:54][C][uart.arduino_esp32:108]: UART Bus 0:
[15:06:54][C][uart.arduino_esp32:109]:   TX Pin: GPIO1
[15:06:54][C][uart.arduino_esp32:110]:   RX Pin: GPIO3
[15:06:54][C][uart.arduino_esp32:112]:   RX Buffer Size: 256
[15:06:54][C][uart.arduino_esp32:114]:   Baud Rate: 9600 baud
[15:06:54][C][uart.arduino_esp32:115]:   Data Bits: 8
[15:06:54][C][uart.arduino_esp32:116]:   Parity: NONE
[15:06:54][C][uart.arduino_esp32:117]:   Stop bits: 1
[15:06:54][C][modbus:143]: Modbus:
[15:06:54][C][modbus:144]:   Flow Control Pin: GPIO4
[15:06:54][C][modbus:145]:   Send Wait Time: 250 ms
[15:06:54][C][modbus:146]:   CRC Disabled: NO
[15:06:54][C][modbus_controller.sensor:010]: modbus_controller.sensorModbus Controller Sensor 'soil_meter'
[15:06:54][C][modbus_controller.sensor:010]: modbus_controller.sensor  State Class: ''
[15:06:54][C][modbus_controller.sensor:010]: modbus_controller.sensor  Unit of Measurement: 'VWC'
[15:06:54][C][modbus_controller.sensor:010]: modbus_controller.sensor  Accuracy Decimals: 0
[15:06:54][C][captive_portal:088]: Captive Portal:
[15:06:54][C][mdns:108]: mDNS:
[15:06:54][C][mdns:109]:   Hostname: monitor01
[15:06:54][C][ota:093]: Over-The-Air Updates:
[15:06:54][C][ota:094]:   Address: monitor01.local:3232
[15:06:54][C][ota:097]:   Using Password.
[15:06:54][C][api:138]: API Server:
[15:06:54][C][api:139]:   Address: monitor01.local:6053
[15:06:54][C][api:141]:   Using noise encryption: YES
[15:06:54][C][modbus_controller:275]: ModbusController:
[15:06:54][C][modbus_controller:276]:   Address: 0x01
[15:06:56][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:06:59][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:07:03][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:07:05][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue

Dujith · March 2, 2023, 8:15pm

I’m not seeing register 0x01 in that list? Isnt it supposed to be 0x0001
And is the device at address 0x01 on the bus? Should be a dipswitch for that.

luisn · March 2, 2023, 8:24pm

I tried 1, 0x0001 and nothing. i will output the details in a sec. HA is updating atm

Dujith · March 2, 2023, 8:32pm

Looked at the device image and it says its slave address is 0x0200?

luisn · March 2, 2023, 8:45pm

Sorry, not sure what slave means ( still learning this)
I changed sensor address back to 0x0001

but same output

[15:42:54][C][logger:293]: Logger:
[15:42:54][C][logger:294]:   Level: DEBUG
[15:42:54][C][logger:295]:   Log Baud Rate: 0
[15:42:54][C][logger:296]:   Hardware UART: UART0
[15:42:54][C][uart.arduino_esp32:108]: UART Bus 0:
[15:42:54][C][uart.arduino_esp32:109]:   TX Pin: GPIO1
[15:42:54][C][uart.arduino_esp32:110]:   RX Pin: GPIO3
[15:42:54][C][uart.arduino_esp32:112]:   RX Buffer Size: 256
[15:42:54][C][uart.arduino_esp32:114]:   Baud Rate: 9600 baud
[15:42:54][C][uart.arduino_esp32:115]:   Data Bits: 8
[15:42:54][C][uart.arduino_esp32:116]:   Parity: NONE
[15:42:54][C][uart.arduino_esp32:117]:   Stop bits: 1
[15:42:55][C][modbus:143]: Modbus:
[15:42:55][C][modbus:144]:   Flow Control Pin: GPIO4
[15:42:55][C][modbus:145]:   Send Wait Time: 250 ms
[15:42:55][C][modbus:146]:   CRC Disabled: NO
[15:42:55][C][modbus_controller.sensor:010]: modbus_controller.sensorModbus Controller Sensor 'soil_meter'
[15:42:55][C][modbus_controller.sensor:010]: modbus_controller.sensor  State Class: ''
[15:42:55][C][modbus_controller.sensor:010]: modbus_controller.sensor  Unit of Measurement: 'VWC'
[15:42:55][C][modbus_controller.sensor:010]: modbus_controller.sensor  Accuracy Decimals: 0
[15:42:55][C][captive_portal:088]: Captive Portal:
[15:42:55][C][mdns:108]: mDNS:
[15:42:55][C][mdns:109]:   Hostname: monitor01
[15:42:55][C][ota:093]: Over-The-Air Updates:
[15:42:55][C][ota:094]:   Address: monitor01.local:3232
[15:42:55][C][ota:097]:   Using Password.
[15:42:55][C][api:138]: API Server:
[15:42:55][C][api:139]:   Address: monitor01.local:6053
[15:42:55][C][api:141]:   Using noise encryption: YES
[15:42:55][C][modbus_controller:275]: ModbusController:
[15:42:55][C][modbus_controller:276]:   Address: 0x01
[15:42:56][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:42:57][D][api:102]: Accepted ::FFFF:192.168.1.55
[15:42:57][D][api:102]: Accepted ::FFFF:192.168.1.55
[15:42:58][D][api.connection:918]: Home Assistant 2023.3.0 (::FFFF:192.168.1.55): Connected successfully
[15:42:58][D][api.connection:918]: Home Assistant 2023.3.0 (::FFFF:192.168.1.55): Connected successfully
[15:42:59][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:43:02][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:43:06][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:43:08][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue
[15:43:11][D][modbus_controller:032]: Modbus command to device=1 register=0x01 countdown=0 no response received - removed from send queue

luisn · March 2, 2023, 8:57pm

And dipswitch where? =|

Dujith · March 2, 2023, 9:00pm

Still trying to talk to register 0x01 instead of 0x0001

luisn · March 2, 2023, 9:02pm

yes thats what i kept noticing, not sure how to fix that

Dujith · March 2, 2023, 9:02pm

Some devices have those. Yours might not.

Dujith · March 2, 2023, 9:04pm

luisn:

sensor:
  - platform: modbus_controller
    modbus_controller_id: reader1
    name: "soil_meter"
    # id: flow
    register_type: holding
    address: 0x01
    # register_count: 1
    # response_size: 2
    # accuracy_decimals: 3
    value_type: U_WORD
    unit_of_measurement: "VWC"

Did you change that or the device address?

luisn · March 2, 2023, 9:06pm

found the pdf online

i downloaded it awhile back and couldnt find it

luisn · March 2, 2023, 9:09pm

yea

  - platform: modbus_controller
    modbus_controller_id: reader1
    name: "soil_meter"
    # id: flow
    register_type: holding
    address: 0x0001
    # register_count: 1
    # response_size: 2
    # accuracy_decimals: 3
    value_type: U_WORD
    unit_of_measurement: "VWC"

Dujith · March 2, 2023, 9:22pm

So, taking back a few steps, lets look at the hardware.
Is everything connected correctly? A connected to A? ect?

luisn · March 2, 2023, 9:30pm

From sensor:
Yellow to A and White to B, then Red to + Black to - (Not connected to the MAX485 but directly to ESP32 5V and GND)
Green says its “SET” but can be added to + as well so i tried both connected and disconnected from +.

DE+RE on the modbus controller and RE-> GPIO4 (flow control pin), on ESP32
DI modbus to → GPIO01 TX ESP32
RO modbus to → GPIO03 RX ESP32

To TEST i added 5V + GND to the MAX485 board and i see RX lite Yellow and TX random green on the ESP32 board.

But reseting board still no data back from device

luisn · March 2, 2023, 9:43pm

i used this to guide me for wiring

luisn · March 2, 2023, 10:49pm

I just dont understand why when i change the address HEX to 0x0001 its not taking it. even when i add a diff address of ex: 0x0007 it shows it as 0x07 in the logs. i tried to do a debug but the about is gibberish to me.

luisn · March 3, 2023, 2:54pm

Progress! i think i just needed to step away.

[09:52:45][D][modbus_controller.sensor:025]: Sensor new state: 4945.00
[09:52:45][D][sensor:127]: 'soil_meter_moisture': Sending state 49.45000 VWC with 0 decimals of accuracy
[09:52:45][D][uart_debug:158]: <<< "\x01\x04\x02\x13Qu\xFC"
[09:52:47][D][modbus_controller.sensor:025]: Sensor new state: 4945.00
[09:52:47][D][sensor:127]: 'soil_meter_moisture': Sending state 49.45000 VWC with 0 decimals of accuracy

but now i have to figure out what i need to do with the incoming data bc its suppose to be from 0-10000

Data Range 0-10000 For 0-100% Default: N/A

But i am not sure what filter or lambda i need to fill out to get there. right now i have the sensor 100% submerged into water and it SHOULD read 10000 no?

luisn · March 3, 2023, 3:00pm

The change i made to make it work was the

    update_interval: 2s

on the controller

luisn · March 3, 2023, 8:27pm

Any thoughts?

Dujith · March 4, 2023, 3:58pm

Isnt that dependant on the Soiltype?