Data display application for Weather Station The weather station controller implements a Modbus RTU Slave protocol over RS485 port. The config parameters for the port are available on the CLI port.
All modbus RTU object type with standard addresses are implemented : Coils, Discrete Inputs, Input registers, Holding registers.
Acces level Read/Write, Size 1 bit
| Device function | Modbus Address | Description |
|---|---|---|
| COIL_START_CALIB_CMD | 0x01 | Write 1 to start calibration with the last values from the calibration registers |
| COIL_COUNT_RST | 0x02 | Write 1 to reset the pulse counter |
Access level Read Only, Size 1 bit
| Device function | Register Address | Modbus Address | Description |
|---|---|---|---|
| DI_CALIB_PROGRESS | 0x01 | 10001 | Calibration in progress flag |
| DI_CALIB_DONE | 0x01 | 10002 | Calibration done flag |
| DI_CALIB_ERROR | 0x01 | 10003 | Calibration error flag |
| DI_EXT_SNS_ERROR | 0x01 | 10004 | External pressure sensor (BME280) error flag |
| DI_INT_SNS_ERROR | 0x01 | 10005 | Internal pressure sensor error flag |
| DI_ACC_ERROR | 0x01 | 10006 | Acceleration sensor error flag |
Access level Read Only, Size 16 bits
| Device function | Register Address | Description | Measurement Unit |
|---|---|---|---|
| IR_4_20MA_IN_HI1 | 30001 | 4-20mA Input 1 high word of float | |
| IR_4_20MA_IN_LO1 | 30002 | 4-20mA Input 1 low word of float | |
| IR_4_20MA_IN_HI2 | 30003 | 4-20mA Input 2 high word of float | |
| IR_4_20MA_IN_LO2 | 30004 | 4-20mA Input 2 low word of float | |
| IR_0_5V_IN_HI | 30005 | 0-5V Input high word | |
| IR_0_5V_IN_LO | 30006 | 0-5V Input low word | |
| IR_RTD_HI | 30007 | Temperature of PT1000 RTD sensor high word | °C |
| IR_RTD_HI | 30008 | Temperature of PT1000 RTD sensor low word | °C |
| IR_PULSE_COUNTER | 30009 | Counter for digital inpiut | |
| IR_PHOTO_HI | 30010 | Photo sensor high word | |
| IR_PHOTO_LO | 30011 | Photo sensor low word | |
| IR_INT_PRESS_HI | 30012 | Internal pressure sensor high word of float | Pa |
| IR_INT_PRESS_LO | 30013 | Internal pressure sensor low word of float | Pa |
| IR_INT_TEMP_HI | 30014 | Internal temperature sensor high word | °C |
| IR_INT_TEMP_LO | 30015 | Internal temperature sensor low word | °C |
| IR_PITCH_HI | 30016 | Inclination angle, pitch high word | ° |
| IR_PITCH_LO | 30017 | Inclination angle, pitch low word | ° |
| IR_ROLL_HI | 30018 | Inclination angle, roll high word | ° |
| IR_ROLL_LO | 30019 | Inclination angle, roll low word | ° |
| IR_EXT_PRESS_HI | 30020 | Ext BME280 pressure high word of float | Pa |
| IR_EXT_PRESS_LO | 30021 | Ext BME280 pressure low word of float | Pa |
| IR_EXT_TEMP_HI | 30022 | Ext BME280 temperature high word | °C |
| IR_EXT_TEMP_LO | 30023 | Ext BME280 temperature low word | °C |
| IR_EXT_HUM_HI | 30024 | Ext BME280 humidity high word | % |
| IR_EXT_HUM_LO | 30025 | Ext BME280 humidity low word | % |
| IR_PULSE_H | 30026 | Pulses per hour for rain sensor | |
| IR_PULSE_24H | 30027 | Pulses per day for rain sensor | |
| IR_0_100MV_IN_HI | 30028 | 0-100mV Input high word | |
| IR_0_100MV_IN_LO | 30028 | 0-100mV Input low word |
Access level Read/Write, Size 16 bits
| Device function | Register Address | Modbus Address | Measurement Unit | Range | Comment |
|---|---|---|---|---|---|
| HR_CALIB_VALUE_HI | 40001 | 0x00 | Calibration value as a floating point number | ||
| HR_CALIB_VALUE_LO | 40002 | 0x01 | Calibration value as a floating point number | ||
| HR_CALIB_CH | 40002 | 0x02 | Calibration works only from command line | ||
| HR_BAUDRATE | 40003 | 0x03 | hz/100 | 12..9216 | |
| HR_ADDRESS | 40004 | 0x04 | 1..254 |
- Read Coils (0x01)
- Read Discrete Inputs (0x02)
- Read Holding Registers (0x03)
- Read Input Registers (0x04)
- Write Single Coil (0x05)
- Write Single Register (0x06)
- Write Multiple Coils (0x0f)
- Write Multiple registers (0x10)
Notes: The calibration can be done and monitored only from CLI, so the variables calibration related are not implemented