SDI12 Channel

• SDI-12 channels are designed to read environmental sensors that support the SDI-12 protocol standard.

• Sensors that support SDI-12 can measure soil moisture, temperature, humidity, wind, rain, sun, UV, and other agronomic and environmental parameters.

• Multiple SDI12 sensors can be attached to a single Wildeye - refer to Meters & Sensor Attachments for accessories required to attach multiple sensors.

• The Wildeye SDI-12 channel makes available a 12V "Switched Power Output" power source to power one or more SDI-12 sensors, according to the standard.

• Select the appropriate accessory to attach to your meter or sensor.

• For meters/sensors with "bare wire" leads, select the M12 Field Connect accessory to attach to the flying lead. Wildeye M12 "Field Connect" Wiring
  For meters/sensors with terminal block connections, use the M12 Bare Wire cable accessory. Wildeye M12 "Bare Wire" Cable Wiring

Wildeye M12 "Field Connect" Wiring

M12 Field Connects are available in 3 different sizes to suit the thickness of the cable coming from your meter/sensor:

ACC-CON-M12-5POS-M-3  -  For meters/sensors with output cable thickness 3-5mm diameter

ACC-CON-M12-5POS-M-6  -  For meters/sensors with output cable thickness 5-7mm diameter

ACC-CON-M12-5POS-M-8  -  For meters/sensors with output cable thickness 8-10mm diameter

Wildeye M12 "Bare Wire" Cable Wiring

Order part ACC-CAB-M12-M-5 "M12 Bare Wire Cable" for connecting to meter/sensors with terminal block connections.

Standards Wildeye Pinouts: NACS, NCCS, NCCS5, NCCS12

Field Connect pinout for connecting to standard Wildeye cable options NACS, NCCS, NCCS5 and NCCS12.  For a complete list of cable type pinouts click here. 

SDI-12 Channel Details

SDI-12 channel inputs are designed to read from SDI-12 comptabile sensors that are powered from the switched power output (SPO) source on the wildeye itself.

General Characteristics of the SDI-12 channel:

• Multiple SDI-12 sensors can be attached to the Wildeye SDI-12 "master". 

• All sensors will be simultaneously powered up by the Wildeye 12V SPO when it is time to read from the sensor

• The 12V SPO can supply a maximum of 150mA at 12V to all attached sensors. 

• Care must be taken to ensure that the total power draw from all attached sensors (including non-SDI12 sensors) does not exceed the maximum capacity of the Wildeye 12V SPO, otherwise it may cause sensors to fail to read correctly. 

• Each attached SDI-12 sensors has an address in the range from 0 to 128, according to the SDI-12 standard. 

• The default SDI-12 address is typically "0". If multiple sensors are connected, they must be set to different addresses otherwise they will conflict and the Wildeye will not be able to read them.

• SDI-12 communication is digital UART communication at 1200 baud. 

• SDI-12 sensors can provide multiple parameters with each read. 

Sensor Setup

Setting up an SDI12 sensor on your Wildeye is simple:

• Check to see if your sensor has built-in support with the Wildeye EasyConfig tool. If your sensor is already supported, it is a simple case of choosing the sensor and selecting the SDI-12 address. 

• If the sensor is not supported via EasyConfig, you can build your SDI-12 sensor setup using standard SDI-12 commands. For further details see here.