Api Serial Port Exchanges; At Commands; Transmitting And Receiving Rf Data; Remote At Commands - Digi PS2CSM Product Manual

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XBee /XBee‐PRO ZB RF Modules

API Serial Port Exchanges

AT Commands

The following image shows the API frame exchange that takes place at the serial port when sending an AT
command request to read or set a module parameter. The response can be disabled by setting the frame ID to
0 in the request.

Transmitting and Receiving RF Data

The following image shows the API exchanges that take place at the serial port when sending RF data to another
device. The transmit status frame is always sent at the end of a data transmission unless the frame ID is set to
0 in the transmit request. If the packet cannot be delivered to the destination, the transmit status frame will
indicate the cause of failure. The received data frame (0x90 or 0x91) is set by the AP command.

Remote AT Commands

The following image shows the API frame exchanges that take place at the serial port when sending a remote AT
command. A remote command response frame is not sent out the serial port if the remote device does not
receive the remote command.
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