ODIN-W2 series - Getting Started
UBX-15017452 - R02
Advance Information
Introduction
Page 6 of 27
1.2
Modes of operation
The ODIN-W2 series can operate in the following three different modes:
•
Command mode
•
Data mode
•
Extended Data mode
By default, ODIN-W2 will enter command mode and has to be configured to start in data mode or extended
data mode. When in data mode or extended data mode, it is possible to enter command mode by transmitting
the escape sequence to the module. By default the escape sequence is:
1.
Silence 1 second
2.
+++
3.
Silence 1 second
The +++ must be sent within 200 ms, which means that it is difficult or impossible to enter the escape
sequence manually using a terminal window though the characters can be typically be pasted instead. The
module leaves the command mode and enters data mode or extended data mode using the ATO1/ATO2
command. It is also possible to toggle the UART DTR pin from High to Low to enter command mode.
Figure 2: AT data mode
In command mode
,
the module is configured using AT commands. For information regarding the available AT
commands, see
ODIN-W2 AT Commands Manual [1]
In data mode
,
the module transmits data transparently between the serial UART and the wireless connection(s).
There is no additional protocol for the UART. Data transmitted on the UART to the module will be transmitted
(and broadcasted if many connections are used), over air, to all wireless connections. Data received from the
wireless connections may be interleaved upon reception and it may be difficult or impossible to figure out from
what remote device data is received. This "multipoint strategy" is called as Wireless Multidrop. It is suitable
mainly for master/slave polled protocols such as Modbus and point-to-point communication.
