Decagon Devices GS3 User Manual

GS3 Integrator Guide R34
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6
SDI-12 TIMING
SDI-12 communication sends characters at 1200 bits per second. Each character has 1 start bit, 7 data
bits (LSB first), 1 even parity bit, and 1 stop bit (Active low or inverted logic levels):
Example SDI-12 transmission of the character ‘1’ (0x31)
All SDI-12 commands and response must adhere to the following format on the data line. Both the
command and response are preceded by an address and terminated by a carriage return line feed
combination.
*MAXIMUM TIME
380 mS
Most Commands
780 mS
For a D command after a concurrent measurement
810 mS
For a D command after a concurrent measurement, with CRC
DATA LOGGER
SENSOR
Break
(at least 12ms)
Command
Response
Sensor must respond
within 15 ms
Maximum time*
Marking
(at least 8.33)
ms)
Marking
(at least 8.33)
ms)
START
STOP
D0
EP
D3
D6
D2
D5
D1
D4

Decagon Devices GS3 Specifications

General

Brand	Decagon Devices
Model	GS3
Category	Accessories
Language	English