pasquale_system_june_2011
Pasquale - Downing Place Sensor Network
Pasquale is a temperature, humidity and voltage sensor board with an RS485 network interface. The CPU sensor board is a slave on a Master/Slave RS485 network. The slave devices perform environmental monitoring. The monitored data is reported upon request by the Network Master.
Each client has a unique 8 bit address. The addresses are assigned by command from the Master. When a device is first installed on a Network, the address is set to 0xFE. The Master then addresses device oxFE with a write address command that includes the assigned address for this device.
Protocol:
| Framing 0x7F | Destination Addr | Source Addr | Command | Data Length | Data bytes | CRC Hi | CRC Lo |
Commands:
| A | Address command | Data = address byte |
| D | Data Request | Data n/a |
| S | Status Response | Data = stored data |
pasquale_system_june_2011.txt · Last modified: 2011/06/17 09:16 by tomgee