Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 143
Denotes Pseudobinary D format
Day of the year of the most recent reading. For 2014,
it is Nov 14th.
Minutes into the day. We can tell that this
transmission should have been made at 02:00 on
Nov14th and parse the data accordingly.
Sensor M1 collected at 02:00
Sensor M1 collected at 01:59
Sensor M1 collected at 01:58
Sensor M1 collected at 01:57
Sensor M1 collected at 01:56
Sensor M2 collected at 02:00
15.4. Six Bit Binary Encoded Format
The 6 bit binary format is used to encode numbers into displayable ASCII characters. Fractional
numbers cannot be represented, so, for instance a battery voltage of 13.04 volts set up with 2
right digits will be sent as 1304.
A 1 byte encoded number can range from -32 to +31.
A 2 byte encoded number can range from -2048 to +2047
A 3 byte encoded number can range from -131072 to +131071
Binary encoded numbers are always sent most significant bytes first. The number itself is broken
down into 6-bit digits, and each digit is placed in one byte of data. The number 64 (ASCII @) is
added to each digit to make it fall within the range of displayable ASCII characters. The only
exception is that 127 (ASCII <DEL>) is sent as 63 (ASCII ?)
15.4.1. Example 1: Encoding the Number 10 in 1 Byte
Since 10 will fit in 6-bits we only have to add 64 which would yield 74. So the number 10 would
appear as ASCII 74 or the letter J.
15.4.2. Example 2: Encoding the Number 12345 in 3 Bytes
First we have to convert 12345 into binary in 6-bit pieces:
12345 (base 10) = 11 000000 111001 (base 2)
Now we can convert each piece back to base 10:
11 000000 111001 (base 2) = 3, 0, 57
Finally, we add 64 to each piece and convert to ASCII:
67, 64, 121 = ASCII C@y
To Next Page
Loading...