FOBOEM Telemetry system
DS-FOBOEM-2
Operation
The ZPT module will remain in a low power listening mode at all times when power is present and
the Sleep Input is Low. When a valid RF signal is received ZPT will wake and process the RF
packet.
if the received RF Packet is from a Transmitter that has been “Paired” to the ZPT module, the
Digital Telemetry outputs are asserted accordingly.
The RF Packet Data is always presented at the Serial data output to the host.
Pairing Process
This process creates a paired link between an input button on a transmitter with one of the ZPT
Digital Telemetry outputs. Any input from any transmitter can be paired to any output of the
ZPT module.
1. Briefly GND Pin 5, the LED will flash once - this shows OP1 is selected
2. GND Pin 5 again after release the LED will flash twice to show OP2 is selected
3. Repeat above process to select OP3 or 4
4. With the desired output selected (and before a 10sec timeout)
5. Press the button or activate the input on the transmitter to be paired.
6. This will complete the pairing and the LED will flash twice to confirm
Memory: maximum storage is 30 pairings.
Erase
To erase the ZPT memory and remove all stored transmitter pairings you must connect the
Learn
Pin (5) to Ground for 10 seconds.
The Learn LED will illuminate while the pin is grounded and after it is disconnected will flash 3
times to Confirm memory erase has been completed.
Outputs
Outputs are LVTTL / LVCMOS at Vcc and are Active high.
Momentary or Latching Function
ZPT actions transmitter button state change only, therefore momentary mode requires receipt
of a “button down/input active” packet and a “button up/input not active” packet from a trans-
mitter. In momentary mode on receiving a “button down” the ZPT will hold its output active until
a “button up” is received. In latching mode ZPT must see “button down” then “button up” in or-
der to make a state change to assert or relax an output.
Mode
LED
Description
Normal operation
OFF
No RF data is being transmitted/received
Flickering
Module is receiving data
Learn and erase
ON
Flashes
While input is connected to GND
(i.e. during button press).
Flashes to show output selection and
paring success
Learn mode times out after 10 seconds
Flashing twice
ZPT pairing successful
Flashes three
times
ERASE successful
