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What is SDI-12 protocol?
SDI-12 (Serial Digital Interface at 1200 baud) is an asynchronous serial communications protocol for intelligent sensors that monitor environment data. These instruments are typically low-power (12 volts), are used at remote locations, and usually communicate with a data logger or other data acquisition device.
What is DDI serial?
DDI-SERIAL INTRODUCTION The DDI-Serial protocol is the method used by the Decagon’s family of data loggers for collecting data from the sensor. This protocol uses the data line configured to transmit data from the sensor to the receiver only (simplex).
What is SDI bus?
A cabled interface between a PC and development board. The Serial Debug Interface [SDI] is a Motorola interface [freescale semiconductor] that a debugger [PC] uses to communicate with an external system. The SDI data format is 8 data bits, 1 stop bit, no parity, and a variable baud rate.
What kind of interface is the SDI-12 bus?
They have SDI-12 to RS232 translators and SDI-12 to USB translators for computer interfaces, and also analog to SDI-12 translators to convert any sensor into an SDI-12 compliant device. This simple circuit interfaces a 3.3V microcontroller with a 1200 baud UART to the SDI-12 bus.
What is SDI 12 and what is it used for?
SDI-12. SDI-12 (Serial Digital Interface at 1200 baud) is an asynchronous serial communications protocol for intelligent sensors that monitor environment data. These instruments are typically low-power (12 volts), are used at remote locations, and usually communicate with a data logger or other data acquisition device.
How many sensors can be connected to SDI-12?
There is an SDI-12 institute which defines standards and versions for SDI-12. The interface standard allows up to ten (10) SDI- 12 compatible instruments (sensors) to be connected to a datalogger (recorder) which is able to collect readings from the sensors over a two-wire, shared communication bus at 1200 bps.
Where can I buy a SDI 12 translator?
Fortunately, you can purchase translators from Vegetronix which all easy implementation of the SDI-12 protocol. They have SDI-12 to RS232 translators and SDI-12 to USB translators for computer interfaces, and also analog to SDI-12 translators to convert any sensor into an SDI-12 compliant device.