? SDI-12 / 485 Network Commands
Description
Master
VibWire-108 Response
Acknowledge active
a!
a\r\n
Send ID:

provided to complement SDI-12 protocol
aI!
a13KEYNESCOVibWire-1080001\r\n

Part Description assigned by Keynes
Address query

identifies  instrument address
and commonly used on single instrument
operations only.
?!


Used to make command set SDI-12 compatible
a\r\n

Where a = number 0 - 9 for SDI-12
           0 -9   letters  a - z   for RS485
                               A - Z
change Address:

used to change instrument address from default to new one for network operations
aAb!

a = initial address     b = new address
b\r\n

a : b     = number   0 - 9 or a - z
Start Measurement

instruct an instrument to make measurement
aM!

a = address of instrument
atS\r\n

instrument with address a returns after t seconds results for 8   sensors
Concurrent measurement:

Used for polling multiple instruments on a network to start to make readings. This command frees RS-485 bus for other devices
aC!

start measurement instrument address  a

a06016\r\n

initial response only after receipt of instruct and no response when data ready to be sent.
Send data

data returned  
aND! = Vib + Vib + Therm + Therm
and has same format for each command
aD0! aD1! aD2! or aD3!

aD0!  = channel 0 and 3   VibWire Sens
aD1! =  channel 4 and 7   VibWire Sens
aD2! =  channel 0 and 3   Therm/analog
aD3! =  channel 4 and 7   Therm/analog
+xxxx.x+xxxx.x+xxxx.x+xxxx.x\r\n