Most IoT controller is customized for a specific application such as elevator monitoring, door control/monitoring and others. Following is some examples of feature definition :
General purpose controller
Specification example of IoT controller with RS485 :
| Items | Specification |
| Wifi | E803 Wi-Fi Module |
| RS485 | 2 set, one Master and one Slave |
| DI | 4 set with optical isolation. Sink, common ground, active low |
| DO | 8 set, 2 set with 2Arelay |
| AI | 1 set, 0 ~ 10V |
| AO | 1 set, 0 ~ 10V, PWM output |
| Temperature sensor | NTC type |
| LED Indicators | Power LED x 1 , SW Reset LED x 1 |
| Button | HW Reset Button x1, SW Reset Button x 1 |
| Power | 100~265Vac AC to DC Converter |