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RS485 Configuration

RS485 Selection​

rs485 selection

  • RS485 & Analog Mode Switching
    To connect a sensor, first select the appropriate mode — either RS485 or Analog — depending on the sensor type.

  • RS485 Address Configuration
    Once RS485 mode is selected, navigate to the RS485 Address section to configure the device address and other communication parameters required for the sensor to function correctly.

Power Output & Initialization Settings - RS485​

power output

  • Power Output
    Select the appropriate output power level from the list based on your sensor’s operating voltage or current requirements. This determines how much power the device supplies to the connected sensor.

  • Sensor Initialization Time
    Enter the initialization time (range: 0–2000 ms) required by your sensor to stabilize and begin operating after power is applied.

note

Power Consumption : The connected sensor will draw power directly from the device

note

Sensor Warmup Time: Some sensors need a brief warm-up period before they can start sending accurate data.

Baud Rate​

baud rate

Select the baud rate that matches your sensor or device’s communication speed. Using the correct baud rate ensures proper data transmission over RS485 or similar serial interfaces.

  • Common values:
    9600 , 19200 ,38400,115200, - (check your sensor’s datasheet).

Parity​

baud rate

Choose the parity type — None, Even, or Odd — based on your sensor’s communication protocol. Parity is used for basic error detection in serial communication.

Refer to your sensor’s documentation to select the correct setting. Mismatched parity can result in failed or corrupted data transfers.

RS485 Field Setup​

Follow the steps below to configure RS485-based sensors or devices through the Maya app:

baud rate

01. Enable RS485 Field

  • Toggle the “Enable Field” switch to activate RS485 configuration for a specific channel.

01. Enable RS485 Field

  • Toggle the “Enable Field” switch to activate RS485 configuration for a specific channel.

02. Parameter Name (Optional)

  • Assign a custom parameter name for easier identification in reports or the Maya app.
    Example: Soil_Moisture, Energy_Meter_KW

03. Slave ID

  • Enter the Slave ID of the RS485 device.
    Example: 1, 2, 10 (Check your device's Modbus documentation)

04. Function Code
Select the appropriate Modbus Function Code:

  • 0x03 – Read Holding Registers
  • 0x04 – Read Input Registers

05. Data Type

  • Choose the correct data format expected from the device:
  • INT16, UINT16, INT32, FLOAT32, etc.
    Make sure this matches the sensor’s Modbus register definition.

06. Register Address

  • Enter the starting register address to read from.
    Refer to your device’s Modbus register map.

07. Number of Parameters (Group Read)

  • Define how many registers to read in a single request.
    Example: 2 for FLOAT32, 1 for INT16

08. Check Values

  • Click the “Check” button to verify that the device is returning valid data using the selected configuration.