C-Bus : Poll a C-Bus Temperature Sensor

You can poll the temperature sensor on a remote network.

This information is GENERALLY made available to C-Bus Enabled members.

However... Here is the infor for a temperature sensor through a single bridge.

If your remote network is one bridge away, you need to know the network number of the network on the other side of the bridge.

Issue the following special magic command to the PCI on the local network:

\06<network>09<unit>2A0E02

Where <unit> is the unit address you found, expressed as 2 hex digits, and <network> is the network number of the network on the other side of the bridge, also expressed as two hex digits. For example, to read the temperature from unit address 42 (decimal 66), on network F2, the command would be:

\06F209422A0E02


When you get the answer back from the remote temperature sensor there will be some extra information in the packet. It will look like this:

86<network><byte>01<unit>830E<val1><val2><checksum>

where <network> is the network ID you saw above, <unit> is the unit address you sent in Step 2, <byte> is 2 hex characters you can ignore, and <val1> and <val2> encode the temperature. For example, you might receive a reply of :

86F2090142830E19774C

This means :
- F2 = network this came from
- 09 = ignore this
- 01 = there is another addressing byte to follow
- 42 = Unit Address
- 830E = temperature sensor reply
- 19 = val1 (25 decimal)
- 77 = val2 (119 decimal)
- 4C = checksum

HTH