Digi International Inc.
Library to easily communicate with XBee modules.
Dependencies: DigiLogger
Dependents: WaterLogger XbeeGateway XBee_Cooker ProjetReceiver ... more
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Serial hardware flow control
The XBee constructor 'rts' and 'cts' parameters determine the hardware flow control in the serial connection between the mbed processor and the XBee module. Each of the parameters can be set to 'NC' meaning not connected or to an actual mbed module pin, leading in following 4 combinations:
| rts | cts | Flow Control |
|---|---|---|
| NC | NC | No flow control |
| configured | configured | RTS and CTS |
| configured | NC | RTS only |
| NC | configured | CTS only |
- If rts pin is configured, then that pin has to be wired from the mbed module to the RTS# pin of the XBee module (pin 16 on THT modules, pin 29 on SMT modules); and the XBee module DIO6 has to be configured accordingly ("D6" at command set to 1).
- If cts pin is configured, then that pin has to be wired from the mbed module to the CTS# pin of the XBee module (pin 12 on THT modules, pin 25 on SMT modules); and the XBee module DIO7 has to be configured accordingly ("D7" at command set to 1).
Information
The XBee constructor checks that the XBee module DIO7 and DIO6 are configured accordingly. If not you will see errors like:
'Bad CTS configuration. Radio 'D7' param is x and should be 1'
Information
From the XBee module point of view, CTS# is is an output and RTS# is an input.
Warning
Our latest test indicate that mbed platforms are not correctly handling the RTS signal. If you experience problems we recommend not using it and just usr CTS.