Install hardware
You can use the ArPI board for replacing the main board of an existing security system or building a new.
For that you need the following components:
- power supply (SCP-35/50-12 UPS)
- GSM module (SIM900)
- RTC module (DS3231)
- Wiegand keypad (Wiegand 26/34)
You can reuse the following components from the existing system:
- sensors
- syren
Connect power supply¶
You need a 12V 5A power supply preferred with UPS battery backup (SCP-35/50-12 UPS). In case of an UPS power supply you can use the "S+" input for identifying the power outage by pulling it to ground.
Connect sensors¶
Sensors can be connected with NC/NO connections.
Connect syren/outputs¶
The syren can be connected to the GO+ or GO- terminals.
- The GO+ terminal will be pulled from GND to 12V when the syren should be activated.
- The GO- terminal will be pulled from 12V to GND when the syren should be activated.
Configurable outputs are the following:
- R0/R1 - relay outputs (GND / 12V)
- O0,O1,O2,O3,O4 - open collector outputs
Connect Wiegand keypad¶
The keypads needs power supply and data connections.
- D0 - Wiegand Data 0
- D1 - Wiegand Data 1
- D2 - Wiegand doorbell
Connect GSM module¶
The GSM needs power supply and data connections.
- GND - GSM GND
- VCC - GSM VCC
- TX - GSM RX
- RX - GSM TX
Connect RTC¶
The RTC needs power supply and data connections.
- VCC - RTC VCC
- GND - RTC GND
- SDA - RTC SDA
- SCL - RTC SCL