GENERAL
-------
2400 baud, 8 data bits, 1 stop bit, no parity. 
ASCII hex digits (0 - F). 
All fields are 4 bytes except 2 bytes where indicated in the complete record mode. 
Most significant digit first. 

NOTES: 
1. IGNORE THE FIRST TWO DIGITS OF WIND DIRECTION. THESE DIGITS ARE NORMALLY 00, BUT IF A DIRECTION CALIBRATION NUMBER HAS BEEN ENTERED, THEY MAY BE FF. 
2. RAIN GAUGES THAT MEASURE IN INCREMENTS OF 0.1 MM ARE FULLY SUPPORTED ON THE ULTIMETER LIQUID CRYSTAL DISPLAY. ANY PROGRAM OR DEVICE USING THE SERIAL DATA OUTPUT MUST UNDERSTAND THAT THE DATA IS IN 0.1 MM INCREMENTS. SERIAL OUTPUT FOR ALL OTHER RAIN GAUGE SELECTIONS IS REPORTED IN INCREMENTS OF 0.01 INCHES. 

Data Logging Mode (Default Output Mode) Press CLEAR + WIND SPEED for 3 seconds. 
While in this mode, records are sent out continuously at up to about 90 per minute. The total record size is 40 hex digits + header, carriage return and line feed. 

Packet Mode Press CLEAR + WIND CHILL for 3 seconds. 
While in the mode, one record is output every 5 minutes. The total record is 44 hex digits + header, carriage return and line feed. 

Complete Record Mode Press CLEAR + RAIN for 3 seconds. 
While in mode, data is output continuously. The total record size is 448 hex digits + header, carriage return & line feed. 

Modem Mode - input/output (ULTIMETER 2000 only) Press CLEAR + TEMPERATURE for 3 seconds. 
While in this mode, there is no regular data output. 

DATA LOGGING MODE - RECORD STRUCTURE 
------------------------------------
Header = !! 
Data Fields 
1. Wind Speed (0.1 kph) 
2. Wind Direction (0-255) 
3. Outdoor Temp (0.1 deg F) 
4. Rain* Long Term Total (0.01 inches) 
5. Barometer (0.1 mbar) 
6. Indoor Temp (0.1 deg F) 
7. Outdoor Humidity (0.1%) 
8. Indoor Humidity (0.1%) 
9. Date (day of year) 
10. Time (minute of day) 
11. Today's Rain Total (0.01 inches)* 
12. 1 Minute Wind Speed Average (0.1kph)* 
Carriage Return & Line Feed 
*Some instruments may not include field 12, some may not include 11 or 12. Please contact Peet Bros. if this presents any problem. 
Total size: 40, 44 or 48 characters (hex digits) + header, carriage return and line feed. 


PACKET MODE - RECORD STRUCTURE 
------------------------------
Header = $ULTW 
Data Fields 
1. Wind Speed Peak over last 5 min. (0.1 kph) 
2. Wind Direction of Wind Speed Peak (0-255) 
3. Current Outdoor Temp (0.1 deg F) 
4. Rain Long Term Total (0.01 in.) 
5. Current Barometer (0.1 mbar) 
6. Barometer Delta Value(0.1 mbar) 
7. Barometer Corr. Factor(LSW) 
8. Barometer Corr. Factor(MSW) 
9. Current Outdoor Humidity (0.1%) 
10. Date (day of year) 
11. Time (minute of day) 
12. Today's Rain Total (0.01 inches)* 
13. 5 Minute Wind Speed Average (0.1kph)* 
Carriage Return & Line Feed
*Some instruments may not include field 13, some may not include 12 or 13. Please contact Peet Bros. if this presents any problem. 
Total size: 44, 48 or 52 characters (hex digits) + header, carriage return and line feed. 




COMPLETE RECORD MODE - RECORD STRUCTURE 
---------------------------------------
Header = &CR&
Data Fields
1. Wind Speed (0.1kph) 
2. Current Wind Direction (0-255) 
3. 5 minute Wind Speed Peak (0.1 kph) 
4. 5 minute Wind Direction Peak (0-255) 
5. Wind Chill (0.1 deg F) 
6. Outdoor Temp (0.1deg F)(corrected 5/19/97) 
7. Rain Total for today (0.01 in.) 
8. Barometer (0.1 mbar) 
9. Barometer Delta Value (0.1 mbar) 
10. Barometer Correction Factor(LSW) 
11. Barometer Correction Factor(MSW) 
12. Indoor Temp (0.1 deg F) 
13. Outdoor Humidity (.1%) 
14. Indoor Humidity (.1%) 
15. Dew Point (0.1 deg F) 
16. Date (day of year) 
17. Time (minute of day) 
18. Today's Low Chill Value 
19. Today's Low Chill Time 
20. Yesterday's Low Chill Value 
21. Yesterday's Low Chill Time 
22. Long Term Low Chill Date 
23. Long Term Low Chill Value 
24. Long Term Low Chill Time 
25. Today's Low Outdoor Temp Value 
26. Today's Low Outdoor Temp Time 
27. Yesterday's Low Outdoor Temp Value 
28. Yesterday's Low Outdoor Temp Time 
29. Long Term Low Outdoor Temp Date 
30. Long Term Low Outdoor Temp Value 
31. Long Term Low Outdoor Temp Time 
32. Today's Low Barometer Value 
33. Today's Low Barometer Time 
34. Wind Speed (0.1kph) 
35. Current Wind Direction (0-255) 
36. Yesterday's Low Barometer Value 
37. Yesterday's Low Barometer Time 
38. Long Term Low Barometer Date 
39. Long Term Low Barometer Value 
40. Long Term Low Barometer Time 
41. Today's Low Indoor Temp Value 
42. Today's Low Indoor Temp Time 
43. Yesterday's Low Indoor Temp Value 
44. Yesterday's Low Indoor Temp Time 
45. Long Term Low Indoor Temp Date 
46. Long Term Low Indoor Temp Value 
47. Long Term Low Indoor Temp Time 
48. Today's Low Outdoor Humidity Value 
49. Today's Low Outdoor Humidity Time 
50. Yesterday's Low Outdoor Humidity Value 
51. Yesterday's Low Outdoor Humidity Time 
52. Long Term Low Outdoor Humidity Date 
53. Long Term Low Outdoor Humidity Value 
54. Long Term Low Outdoor Humidity Time 
55. Today's Low Indoor Humidity Value 
56. Today's Low Indoor Humidity Time 
57. Yesterday's Low Indoor Humidity Value 
58. Yesterday's Low Indoor Humidity Time 
59. Long Term Low Indoor Humidity Date 
60. Long Term Low Indoor Humidity Value 
61. Long Term Low Indoor Humidity Time 
62. Today's Wind Speed Value 
63. Today's Wind Speed Time 
64. Yesterday's Wind Speed Value 
65. Yesterday's Wind Speed Time 
66. Long Term Wind Speed Date 
67. Long Term Wind Speed Value 
68. Long Term Wind Speed Time 
69. Today's High Outdoor Temp Value 
70. Today's High Outdoor Temp Time 
71. Wind Speed (0.1kph) 
72. Current Wind Direction (0-255) 
73. Yesterday's High Outdoor Temp Value 
74. Yesterday's High Outdoor Temp Time 
75. Long Term High Outdoor Temp Date 
76. Long Term High Outdoor Temp Value 
77. Long Term High Outdoor Temp Time 
78. Today's High Barometer Value 
79. Today's High Barometer Time 
80. Yesterday's High Barometer Value 
81. Yesterday's High Barometer Time 
82. Long Term High Barometer Date 
83. Long Term High Barometer Value 
84. Long Term High Barometer Time 
85. Today's High Indoor Temp Value 
86. Today's High Indoor Temp Time 
87. Yesterday's High Indoor Temp Value 
88. Yesterday's High Indoor Temp Time 
89. Long Term High Indoor Temp Date 
90. Long Term High Indoor Temp Value 
91. Long Term High Indoor Temp Time 
92. Today's High Outdoor Humidity Value 
93. Today's High Outdoor Humidity Time 
94. Yesterday's High Outdoor Humidity Value 
95. Yesterday's High Outdoor Humidity Time 
96. Long Term High Outdoor Humidity Date 
97. Long Term High Outdoor Humidity Value 
98. Long Term High Outdoor Humidity Time 
99. Today's High Indoor Humidity Value 
100. Today's High Indoor Humidity Time 
101. Yesterday's High Indoor Humidity Value 
102. Yesterday's High Indoor Humidity Time 
103. Long Term High Indoor Humidity Date 
104. Long Term High Indoor Humidity Value 
105. Long Term High Indoor Humidity Time 
106. Yesterday's Rain Total (0.01") 
107. Long Term Rain Date 
108. Long Term Rain Total (0.01") 
109. Leap Year Value (0-3) 
110. WDCF Value (0-255) 
111. Today's High Wind Direction (2 bytes) 
112. Yesterday's High Wind Direction (2 bytes) 
113. Spare (2 bytes) 
114. Long Term High Wind Direction (2 bytes) 
115. 1 Minute Wind Speed Average (0.1kph) 
*Some instruments may not include field 115. Please contact Peet Bros. if this presents any problem.
Total size: 448 or 452 characters (hex digits) + header, carriage return and line feed. 

MODEM MODE 
----------

This mode is not available on the ULTIMETER 100/500/800. Any command input will cause the Model 2000 to enter MODEM MODE. 

The command header is >n where n=A-K. The header is immediately followed by from zero to eight digits (all decimal except barometer correction value).

COMMAND SYNTAX 

>A plus 8 decimal digits to SET DATE(4) TIME(4) (Day of Year:0=1/1, Min. of Day: 0=midnight) 
>B plus 3 decimal digits to SET WIND DIRECTION CORRECTION FACTOR (0 to 256) 
>C plus 1 decimal digit to SET RAIN GAUGE INCREMENT SIZE '0' = 0.01" or 0.25mm, '1' = 0.1" or 02.5 mm 
>D plus 8 hex digits to SET BAROMETER CORRECTION VALUE (Most significant digits first) 
>E plus 5 decimal digits to SET SEA LEVEL PRESSURE READING (mbar x 10) 
>F plus 1 decimal digit to SET LEAP YEAR VALUE (0 - 3) 
>G plus no digits for MASTER RESET 
>H plus no digits to REQUEST ONE COMPLETE RECORD 
>I plus no digits to SET DATA LOGGING MODE
From the keypad, hold CLEAR and WIND keys for 3 seconds. 
>J plus no digits to SET PACKET MODE
From the keypad, hold CLEAR and CHILL keys for 3 seconds. 
>K plus no digits to SET COMPLETE RECORD MODE
From the keypad, hold CLEAR and RAIN keys for 3 seconds. 

ULTIMETER II SERIAL DATA OUTPUT 
-------------------------------

The following information is provided for those who may wish to write their own programs to use serial data from the ULTIMETER II weather station (circa early 1990's). 

The ULTIMETER II provides serial data output at a nominal 2400 baud rate. This a one way data flow with no handshaking. The serial output rate averages about 15 records per minute. The serial output is briefly interrupted at times while the microprocessor attends other functions. If an output record is interrupted, the balance of the same record will be output following the interruption. Each record starts with an asterisk (mph) or pound sign (kmph), and ends with a carriage return and a line feed, in the sequence shown below: 

* or # START OF RECORD (1 BYTE) 
CURRENT WIND DIRECTION (1 HEX DIGIT) 0 IS NORTH, 4 IS EAST, ETC. 
CURRENT WIND SPEED (2 HEX DIGITS) IN MPH IF *: IN KMPH IF # 
CURRENT TEMPERATURE (2 HEX DIGITS) SUBTRACT 56 FOR DEGREES F 
UPPER RAIN GAUGE (4 HEX DIGITS) DIVIDE BY 10 OR 100 FOR INCHES* 
LOWER RAIN GAUGE (4 HEX DIGITS) DIVIDE BY 10 OR 100 FOR INCHES* 

CR LF 
* Divide by 10 if your rain gauge senses each 0.1 (0.5mm). 
* Divide by 100 if your rain gauge senses each 0.01 (or 0.25mm).