SS13 Mechanics device: Frequency Monitor

-=COMPONENTS=-
2x Wifi Component (WIFI-1, WIFI-2)
1x Regex Replace Component (REGR-1)
1x Signal Builder Component (SIGB-1)

You will also need:
1x PDA whose address is known

-=COMPONENT SETUP=-
WIFI-1
Frequency: Whatever frequency you're investigating. Don't include a decimal point. eg 1411, 1149
Toggle NetID checking to OFF
Toggle Forward all messages to ON

REGR-1
Regex: /&/||/g

SIGB-1
Starting string: command=text_message&sender_name=Frequency Monitor&address_1=<your PDA address>&message=Activity detected on frequency <your frequency>! Packet as follows:

WIFI-2
Frequency: 1149

-=CONNECTIONS=-
WIFI-1 -- Replace --> REGR-1

REGR-1 -- Add string + send --> SIGB-1

SIGB-1 -- Send radio message --> WIFI-2

-=OPERATION=-
This device will wait for any activity on the frequency of your choice, and send a text message describing any packet it picks up to your PDA.

-=OPTIONAL ADDITIONS=-
A single wifi component can transmit only once per three seconds. For frequencies which see infrequent use but may have short bursts of rapid activity, consider replacing WIFI-2 with a Buffered Transmitter.

For frequencies known to have a consistently high level of activity, replace WIFI-2 with a Multi-Transmitter Array.

Consider coming up with an addition that allows you to give the device instructions - perhaps changing the frequency under investigation - by sending WIFI-2 a PDA message.