This article details the wiring and parameter setup for connecting an Enviropro SDI-12 probe and MLX90614 IR Temperature sensor to the Hawk.

In this example:

• a temperature reading is logged every 5 min from the MLX90614
• an SDI-12 reading is logged every 60 min
• batches of readings are uploaded every 60 min together

Further information:

Be sure to also take a look at:

• Hawk Concepts
• Hawk Operation - Task Schedules
• Configure SDI-12 Readings
• Hawk - Configure MLX90614 Temperature Sensor

I/O Card

Currently, the Ag-Tech1 and the Bluetooth+ Card are the only plug-in IO cards with the SDI-12 and I²C interfaces. 

1. Install either of these cards to the Hawk Board

Configuration

SDI-12 probe

Wiring

Please see the Hawk Baseboard + Plug in Cards - Wiring+Pin Out for info on the appropriate Agtech1 and Bluetooth+ card IOs.

Important connections are:

1. Connect to probe SDI-12 Line
2. Connect to probe power
3. GND - connect probe ground

Parameter Setup

1. Add Task 1 and configure SDI-12 Action 1 as Task Action 1.
   
   Schedule period is 60 min, log and upload multipliers are set to 1 so we will log and upload the probe reading hourly. GPS is disabled for a stationary application to save power.
2. Configure the readings from the SDI-12 Action 1 tab
   For example, SDI-12 address 0, 5s power on delay, measurements 0 and 2
   
3. Configure V-Boost Level to 12V. Most SDI-12 sensors (including the Enviropro) operate on 12V.
   

MLX Temperature Sensor

Wiring

Parameter Setup

Task

Set the Task 2 and configure the below.

This logs a reading every 5 minutes. Uploads are disabled - since these records will be uploaded as part of the Task 1 hourly upload - no need to include a specific upload - GPS is disabled.

In the I²C Action 1 tab, set the below for 1 second warm-up time, and averaging over 5 x samples (samples are taken 50ms apart each reading).

The ambient temperature will be reported in Analogue 15, and Object Temperature in Analogue 16 with the below settings.