User's Manual

Roving Networks Wifly RN-111B User Guide Version 1.16
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4.2 Wake on UART
When the module is in Sleep mode, the UART itself is disabled. However, wake on UART
can be accomplished using a resistor divider from the data RX pin to the SENS1-4 pin. Good
values for this are a 24K ohm resistor in series from RX to SENS1, and 10K ohms from
SENS1 to Ground.
To enable or disable this function, use: set sys trig 1.
It should be noted that the first byte sent into the module will be lost, so the designer should
take care to send a preamble byte to wake up the module before sending valid data bytes.
WARNING: Under no conditions should the voltage on SENS1-8 input exceed 1.2VDC.
Permanent damage to the module will result.
4.3 Setting Print levels
There are a number of print functions that can be enabled to assist in debugging the operation
and status of the module. The following command is used to control these printouts.
set sys printlvl <value> sets numerous print functions. Bit-mapped value.
Bit Function
1 Print startup messages showing progress of association, dhcp, etc.
2 Print statistics once every 8 seconds.
3 Print RSSI readings once per second.
The most common use of this function is to have the print level set to 1, which displays
startup messages. Once the configuration has been checked, this can then be turned off so
that these messages do not interfere with the datastream.