FOBOEM Telemetry system
DS-FOBOEM-2
ZPT Receiver module serial data output
The ZPT outputs the serial number, button and battery status of the transmitter encoder. This
data may be fed directly to a microcontroller or RS232 type driver circuit which may then be fed
directly to a PC serial port.
Serial data is output on every packet receipt - this equates to every 1/4 second whilst a button
is held down/input active. This data output is valid regardless of whether the Transmitter/Encoder
has been learnt or not. The serial data packet contains a learn bit to show if an encoder input is
learnt.
Serial data configuration
Baud Rate:
19,200
Data bits:
8
Parity:
none
Stop bits:
1
Handshaking:
none
Serial data format:
Serial number [SN1 SN2 SN3]:
Made up of three 8-bit bytes where the most significant byte is transmitted first.
Example: 12ABAA (hexadecimal) or 0001 0010 1010 1011 1010 1010 (binary)
Tx inputs [IP1-8 IP9-16]: made up of two 8-bit bytes.
The low order byte is sent first representing inputs 8 down to 1 where the MSB is input 8 and
the LSB is input 1. The high order byte is sent next representing inputs 16 down to 9 where the
MSB is input 16 and the LSB is input 9.
A bit at state 1 represents an encoder input as active.
Using this method inputs can be multiplexed giving maximum versatility.
Example: 00000000 00010000
Shows input 13 active.
10000000
00000000 Shows input 8 active
10000001
10000000 Shows inputs 16, 8 and 1 active
Learn status and low battery:
One 8 bit byte:
Bit0 shows low battery on Tx - where 1 = Low battery
Bit1 shows learn status of Tx - where 1 = Learnt
RSSI
Received Signal Strength Indication.
Bespoke versions
Customised versions of the all transmitters, receivers and chipsets are available to provide a
bespoke remote chipset for OEM
SN1
SN2
SN3
IP1-8
IP9-16
TXV
Line Feed - $0A (hex)
Input status on Tx
3 byte serial number
STAT
RSSI
CR
10 bytes of serial data sent
Carriage Return - $0D (hex)
Tx battery voltage (if available)
Learn status and low battery
LF
RSSI 0 - 255 (hex)
