New firmware for Railduino v1.3, v2.0 and v2.1 based on official firmware from Pavel Sedláček
- Download the archive from http://myarduinoprojects.com/modbus.html
- Extract the MgsModbus-v0.1.1.zip into libraries folder
- Clone https://github.com/jecrespo/simple-modbus repository
- Copy simple-modbus/Modbus RTU libraries for Arduino/SimpleModbusSlaveV10 folder into libraries folder
- Clone https://github.com/jbechter/arduino-onewire-DS2438
- Move to the libraries folder named
You can install the following libraries via Manage Libraries feature of Arduino IDE:
- OneWire
| Description | Message to server |
|---|---|
| DS18B20 1wire sensor packet | rail1 1w 2864fc3008082 25.44 |
| DS2438 1wire sensor packet | rail1 1w 2612c3102004f 25.44 1.23 0.12 |
| digital input state | rail1 di1 1 |
| analog input state | rail1 ai1 250 |
| Description | Message from server |
|---|---|
| relay on command | rail1 ro12 on |
| relay off command | rail1 ro5 off |
| high side switch on command (Railduino v2.0+) | rail1 ho2 on |
| high side switch off command (Railduino v2.0+) | rail1 ho4 off |
| low side switch on command (Railduino v2.0+) | rail1 lo1 on |
| low side switch off command (Railduino v2.0+) | rail1 lo2 off |
| pwm output command (Railduino v1.3) | pwm1 255 |
| analog output command (Railduino v2.0+) | rail1 ao1 180 |
| status command | rail1 stat10 |
| reset command | rail1 rst |
| Cycle | Tim beetween checks |
|---|---|
| 1wire cycle | 30000 ms |
| analog input cycle | 10000 ms |
| heart beat cycle(only RS485) | 60000 ms |
- MODBUS TCP commands: FC1 - FC16
- MODBUS RTU commands: FC3, FC6, FC16
| register number | description |
|---|---|
| 0 | relay outputs 1-8 |
| 1 | relay outputs 9-12 |
| 2 | digital outputs HSS 1-4, LSS 1-4 |
| 3 | analog output 1 |
| 4 | analog output 2 |
| 5 | digital inputs 1-8 |
| 6 | digital inputs 9-16 |
| 7 | digital inputs 17-24 |
| 8 | analog input 1 0-256 |
| 9 | analog input 2 0-256 |
| 10 | service - reset (bit 0) |
| 11 | 1st DS2438 Temp (value multiplied by 100) |
| 12 | 1st DS2438 Vad (value multiplied by 100) |
| 13 | 1st DS2438 Vsens (value multiplied by 100) |
| - | |
| 39 | DS2438 values (up to 10 sensors) |
| 40-50 | DS18B20 Temperature (up to 10 sensors) (value multiplied by 100) |
Combination of 1wire sensors must be up to 10pcs maximum (DS18B20 or DS2438)
Using RS485 the UDP syntax must have \n symbol at the end of the command line