User's Manual

Table Of Contents

4000/5000 Modems’ User Guide

Chapter 9: IO Management

BlueTree offers a complete set of AT commands to query/set its general purpose and

dedicated input and output pins. These commands can be sent to the modem:

 Locally via the serial, USB or Ethernet ports

 Remotely over the air

Please refer to BlueTree’s AT Command Reference document for more details:

http://www.bluetreewireless.com/support/downloads/documents/

Digital Output Control

The three outputs on the modem an be used to turn ON or OFF peripheral equipment

such as light, a siren, a valve, lock/unlock a door, enable/disable a starter,…

Example of turning ON digital output 2: AT+BDOSET=DO2,1.

Digital Input State Query

The modem monitors all of its 4 general purpose digital inputs for a change in state,

along with the dedicated ignition input. The state of these inputs can be queried as

follows:

AT+BDIGET?

+BDIGET: DI1,0

+BDIGET: DI2,0

+BDIGET: DI3,0

+BDIGET: DI4,0

+BDIGET: IGN,1

Analog Input Value Query

The modem has an 10-bit ADC (analog to digital converter) allowing it to monitor all of

its 3 general purpose analog inputs for a change in state, along with the dedicated

power input. The value of these inputs can be queried as follows:

AT+BAIGET?

+BAIGET: PWR,13.553

+BAIGET: AI1,3.056

+BAIGET: AI2,1.987

+BAIGET: AI3,0.000