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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.

Power inputs

Connect sensors

Sensors can be connected with NC/NO connections.

Sensor inputs

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

Output terminals

Connect Wiegand keypad

The keypads needs power supply and data connections.

  • D0 - Wiegand Data 0
  • D1 - Wiegand Data 1
  • D2 - Wiegand doorbell

Wiegand outputs

Connect GSM module

The GSM needs power supply and data connections.

  • GND - GSM GND
  • VCC - GSM VCC
  • TX - GSM RX
  • RX - GSM TX

GSM outputs

Connect RTC

The RTC needs power supply and data connections.

  • VCC - RTC VCC
  • GND - RTC GND
  • SDA - RTC SDA
  • SCL - RTC SCL

RTC outputs