OOK - posssss/portapack-mayhem GitHub Wiki

On–off keying (OOK) denotes the simplest form of amplitude-shift keying (ASK) modulation that represents digital data as the presence or absence of a carrier wave. OOK system often have a coding sequence. OOK is often used in remote garage and gate keys, often operating at 315 MHz or 433.92 MHz. Most modern systems though use a rolling code system to prevent Replay attacks.

The App has a number of Pre-configured Device types such as 2260,2262,16 Bit, 1527, 526E, T12E, 5026, UM3750, BA5104,145026, HT6***, TC9148.

There are 2 Tabs. Key Items on each of the App tabs, that can be selected with the cursor and changed with the encoder knob are:

Common to all TABs

Title bar: The usual items may be changed and displayed.
Frequency: At the lower part of the App is the Frequency setting. This is stored in persistent memory
Step size: This is next to the frequency and allows the selection of the standard step sizes.
Gain: The gain setting are below the frequency and marked (0-47) LNA(IF) and AMP 0=0db or 1=14dB.
Start: This button starts the transmission and if pressed again can stop the transmission.

Config Tab

Type: This is the selection of a pre-Configured Encoder/ decoder chip Type.
Clk: Selects the frequency of the OOK switching rate. This is interlinked to the frame rate for example 1kHz clock is 36000 10^6 s frame rate. Range of clock is 1-500KHz.
Frame: This can be selected but as stated above sets the clock and frame rate. The settings go from 30 10^6s to 36000 10^6s.
Symbols: This is the pattern of the symbol message sent. The 0/1 can be change to alter the OOK pattern. Note the pattern is made up as shown in the letters line of A for Address, D for DATA, S for Sync .
Waveform: This shows the diagrammatic view of the waveform sent.
Progress Bar: When the transmission is started it shows the progress of the transmission while sending. Not many of the transmission are very short and looks like they are not sent.

Scan Tab

This is not implemented.