Pin 3 | Pin 5 . . . | Transmit Data |
Pin 4 | Pin 7 . . . . | Data Set Ready |
Pin 5 | Pin 9 . . . | Signal Ground |
Pin 6 | Pin 2 . . . | Data Terminal Ready (must be true to send data) |
Pin 7 | Pin 4 . . . | Clear to Send |
Pin 8 | Pin 6 . . . | Request Send |
Pin 9 | Pin 8 . . . |
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To communicate with a computer a null modem adapter or cable must be used.
Modem Installation
A modem may be used with the WRL for remote operations. A modem adapter must be used to properly connect the weather station to a modem. For auto answering, an
Typical Output
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|
| Temperature |
| Daily | Monthly | Rainfall |
Time | Date | Direction Speed | Aux Indoor Outdoor Humidity | Pressure | Rain | Rain | Rate |
15:00 07/24/90 127 03MPH 070F 069F 082F 090% 30.04" 00.01"D 01.20"M 00.00"R 15:15 07/24/90 130 04MPH 052F 069F 078F 099% 30.04" 00.19"D 01.38"M 00.72"R 15:30 07/24/90 122 02MPH 065F 068F 072F 089% 30.04" 00.19"D 01.38"M 00.00"R MIN 07/24/90 123 00MPH 070F 067F 067F 054% 30.00" 00.19"D 01.38"M 00.00"R MAX 07/24/90 135 25MPH 052F 071F 092F 099% 30.06" 00.19"D 01.38"M 00.72"R
Computer Interface
The WRL with the proper cable, may be plugged directly into computers equipped with RS- 232 interfaces. Data may be captured using a communication program like hyperterminal or the TWICAL program. The WRL sends data in a serial format at 300 to 19.2 baud rate, 8 data bits, no parity and one stop bit.
Note: The WRL has two separate minimum and maximum memories. Clearing the M command minimum and maximum memory will not affect the C command minimum and maximum memory and
Texas Weather Instruments, Inc. | 16 | WRL Instruction Manual |