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API frames
API frame exchanges
Every outgoing API frame has a corresponding response (or ACK) frame that indicates the success or
failure of the outgoing API frame. This section details some of the common API exchanges that occur.
You can use the Frame ID field to correlate between the outgoing frames and associated responses.
Note
Using a Frame ID of 0 disables responses, which can reduce network congestion for non-critical
transmissions.
AT commands
The following image shows the API frame exchange that takes place at the UART when you send a
0x08 AT Command Request or 0x09 AT Command-Queue Request to read or set a device parameter.
To disable the 0x88 AT Command Response, set the frame ID to 0 in the request.
Transmit and Receive RF data
The following image shows the API exchanges that take place on the serial interface when a device
sends a 0x10, or 0x11 Transmit Request to another device.
The device sends the 0x8B Transmit Status frame at the end of a data transmission unless you set the
frame ID to 0 in the transmit request. If the packet cannot be delivered to the destination, the 0x8B
Transmit Status frame indicates the cause of failure.
Use the AP command to choose the type of data frame you want to receive, either a (0x90) RX
Indicator frame or a (0x91) Explicit Rx Indicator frame.
XTend vB DigiMesh RF Module User Guide
API frame exchanges
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