FCC ID:
M5ZCNT
Wireless Sensor Data Format
The Point Six, Inc. 418 MHz wireless analog transmitters require a compatible receiver
with the ability to receive, error check and provide RS232 and RS422/485 interface. This
document describes the data format provided by the
Point Host
418 MHz. Receiver.
The transmit packet from a receiver is approximately 15 milliseconds in duration and
consists of 13 bytes of data:
1-byte ID/Mode field
8-byte serial number
12-bit analog in a 16 bit word
2-byte CRC-16 error check
The Point Host receiver receives and processes this packet. The receiver performs a
CRC-16 error check on the packet. If the data is not accurate it is discarded. When a
packet is received that is error free it is converted to a 29-character packet and
transmitted out the serial port at
19,200 Baud
. The data is transmitted serially in ASCII
Hex format and terminated with a CR character. This format requires two bytes for each
byte of data; 14 data bytes x 2=28 plus the CR is 29 characters
The resulting binary data format of the packet is:
1-byte ID field
this field will contain a byte whose LSBit indicates the service
state of the transmitter, 0=normal, 1=service mode.
Note
that the
CRC-16 is calculated with the MSBit of the ID field set low, the
data is received with the MSBit of the ID field set high. Proper
CRC-16 calculation requires that the MSBit be assumed to be low
even though it is received set high.
8-byte serial#
this field contains the serial number of the 1-Wire sensor.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES, OPERATION IS
SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY
NOT CAUSE HARMFUL INTERFERENCE AND (2) THIS DEVICE MUST ACCEPT
ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY
CAUSE UNDESERED OPERATION
FCC ID: M5ZCNT
MADE IN USA
