The Hawk is sold as a 'baseboard' and plug in cards are used to interface to sensors. 8 lines are available. This allows for a variety of sensor-monitoring applications and input combinations to be catered for on the same device. Additionally if you have a specific set of inputs to monitor, we can manufacture a new IO card to cater for your requirements (MOQs apply).
- BaseBoard
- This is the HAWK-4G device - Baseboard, housing, Internal LiPo back-up battery
- The baseboard handles the cellular connectivity, external power connections and has a single Digital Input available. There are 9 x I/O pins, which are used by the I/O cards. Their function is determined by what card is inserted.
- I/O Cards
- Allows the device to be connected to various interfaces. Current cards are listed below
Baseboard pin out
The Hawk has the below 12 lines available on it's screw in terminal header

- I/Os 1-9. These I/Os are used by the specific Plug-in-board. Mappings below.
- Hawk standard pins
- Digital Input 1
- GND
- VIn - 6-28V DC (max)
I/O Cards
Ag-Tech-1
Hawk IO | Function |
1 | SDI-12 |
2 | VBoost |
3 | Switched Ground Output |
4 | I²C SDA |
5 | 3.3V output |
6 | I²C SCL |
7 | Card Digital Input |
8 | 1-wire input |
9 | 4-20mA |
Ag-Tech-2 (Coming Soon!)
Hawk IO | Details |
1 | SWGND |
2 | SDI-12 |
3 | +3.3V OUT |
4 | 1-Wire |
5 | Analog Input 1 |
6 | Analog Input 2 |
7 | Analog Input 3 |
8 | Analog Input 4 |
9 | +VBOOST OUT |
RS-1 Card
Hawk IO | Function |
1 | Analogue Input 1 |
2 | VBoost |
3 | RS485 B |
4 | RS485 A |
5 | 3.3V output |
6 | SWGND |
7 | Card Digital Input |
8 | 1-wire input |
9 | 4-20mA |
Preliminary Serial Card (Coming Soon!)
Hawk IO | Details |
1 | RS232 TX |
2 | RS232 RX |
3 | TTL TX |
4 | TTL RX |
5 | Vboost |
6 | SWGND |
7 | Analog Input 1 |
8 | Digital Input 1 |
9 | Digital Input 2 |
Preliminary Bluetooth+ Card (Coming Soon!)
Hawk IO | Details |
1 | Vboost |
2 | SDI12 Data |
3 | 4-20mA Input |
4 | 3v3 Power Out |
5 | I2C Clock |
6 | I2C Data |
7 | SWGND |
8 | Analog Input 1 |
9 | Digital Input 1 |
Note: The Bluetooth+ Card has a Bluetooth module on the card, in addition to the above I/Os.
Preliminary Digital Card (Coming Soon!)
Hawk IO | Details |
1 | Digital Input 1 |
2 | Digital Input 2 |
3 | Digital Input 3 |
4 | Digital Input 4 |
5 | Digital Input 5 |
6 | Analog Input 1 |
7 | Analogue Input 2 |
8 | SWGND |
9 | Vboost |