© Microhard Systems Inc. 30
3.0 Hardware Features
Config Button:
The Config button on the pX2 can be used to either reset the modem into its factory default configuration,
or it can be used to perform a firmware recovery procedure.
Factory Default Settings: While power applied and the pX2 in an operational state, press and hold the
Config Button for 8-10 seconds or until the module reboots. It will reboot with the factory default
configuration settings.
Firmware Recovery: To load the firmware on the unit it is recommended to use the normal WebUI to
perform a firmware update (Maintenance). In the event that the firmware cannot be loaded using the
standard WebUI (non responsive unit), pressing and holding the Config Button while powering-up the
module will force the pX2 into a firmware recovery mode. There are 3 main modes, HTTP, TFTP and
Master Reset. The table below shows the time required to hold the Config button while power is applied:
HTTP Recovery: Set an IP on a PC to 192.168.1.1. Open a web browser and Navigate to
192.168.1.39. This will open a simple webpage which will allow a firmware file to be loaded.
TFTP Recovery: Set an IP on a PC to 192.168.1.1. Use a TFTP session to push the firmware file
to the modems recovery IP of 192.168.1.39. See Appendix for Firmware Recovery Procedure.
Master Reset: Runs Master Reset, file system is erased.
RS232 Serial:
The RS232 Serial data port can be used to communicate with
RS232 Serial devices or it can be configured to operate as a
console port. See Table 3-3 for pin assignments.
CPU/Status:
The CPU/Status LED indicates that power has been applied to
the module. A Solid LED indicates normal operation, while
flashing indicates boot or firmware upgrade status.
TX/RX LEDs:
The TX/RX LEDs indication wireless traffic to/from the pX2
module.
RSSI LEDs:
The RSSI LEDs indicate the Received Signal Strength on the Wireless
Link. On a Access Point it will indicate an average RSSI value based on
connected units. On a Client/Station the RSSI LEDs will represent the
signal strength between the Station and the AP it is connected to. (The
more LEDs illuminated, the stronger the signal)
Vpa 3/5V:
The Vpa jumper allows the radio inside the pX2 to be connected to 3.3
or 5VDC. For the pX2 to operate at maximum output Transmit (Tx)
power of 1 Watt (30dBm), the Vpa jumper must be set to 5VDC (Pin
5+6).
0 to 5 seconds
HTTP Recovery
5 to 10 seconds
TFTP Recovery
10 to 15 seconds
Master Reset
15+ seconds
No Effect
Name Data Port Input or
Output
DCD 1 O
RXD 2 O
TXD 3 I
DTR 4 I
SG 5
DSR 6 O
RTS 7 I
CTS 8 O
RING 9 O
Table 3-3: Data RS232 Pin Assignment
1
2
5
6
1
2
5
6
5VDC
3.3VDC
Vpa Jumper
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