ASIMET Relative Humidity Module Version 5.xx with SDHC Command Set

file: asihrh24v5_cmd.html
11 May 2015

ASIMET RELATIVE HUMIDITY MODULE VERSION 5.xx with SDHC COMMAND SET Preliminary

See ASIMET MODULE OPERATIONS document for instructions on how to hook up the comms link to your PC and RS-485 adapter.
Refer to Latest Version Information for reference info on latest firmware version numbers.

SDHC NOTE 1 - Firmware Ver 5.xx has been tested using SanDisk SDHC cards of 2 GB, 4 GB, and 8 GB on WHOI ASIPIC24 Rev A CPU boards.

SDHC NOTE 2 - SDHC cards MUST be initialized using the I command choice in the SDOK command menu. SDHC cards may be read on a PC and will contain 3 files: an ASHRH???.ID file, an ASHRH???.INF file, and an ASHRH???.DAT file. ??? will be replaced in the filename with the first 3 digits of the serial number specified in the UOK command under Menu #2 - MODSER.

Refer to SDHC Storage Format for details of the SD card data file format.

NOTE: this module interchangeably uses either the HPS24IF (PIC24-based) sensor front-end board or the VOSHPS type of sensor front-end. Modules built after ?? 2015 use the newer HPS24IF front-end board. Reference the HPS24IF Front-End Module Command Set document. If this module contains a VOSHPS type of sensor front-end (due to field repair/substitution), reference the VOSHPS Front-End Module Command Set document.

Note: commands sent are indicated in BOLD, responses in normal text. <crlf> represents ASCII carriage return and line feed; <crlfetx> represents ASCII carriage return, line feed, ETX (03h).

Command Description

A Address acknowledge
- returns address of module, terminated by <crlfetx>
- example:
  #HRH01A HRH01<crlfetx>
- NOTE: HRH01 is the default address of the HRH module; it may be changed by the 'U' command but any failure of EEPROM will result in the use of the default address. In the event of EEPROM failure, a message is sent to the RS- 232 console port on startup. In addition, use of defaults is reported in the 'L' command.
B Output both calibrated and raw values
- outputs both calibrated and raw data values, as follows: RH% degc : counts counts<crlfetx>
- example:
  #HRH01B 76.163 23.514 : 43265 21783<crlfetx>
- RH% is relative humidity in percent, degc value is degrees C; raw values are 16-bit counts.
- C language format: "%8.3f %8.3f : %7u %7u\r\n\x03"
C Output calibrated data
- outputs calibrated value, in RH% and degrees C, as follows:
  RH% degc<crlfetx>
- example:
  #HRH01C 76.163 23.555<crlfetx>
- C language format: "%8.3f %8.3f\r\n\x03"
D Set RT clock date/time: 'YYYY/MM/DD HH:MM:SS'
- on module startup, the date and time are initialized from the battery-backed RTC on the board. The 'D' command accepts a fixed format string of exactly 19 characters representing date and time. For example, sending the following command:
  - #HRH01D2013/07/18 10:35:15
  will set the date to 18 July 2013 at 10:35:15 AM.
- the module returns <crlfetx> in acknowledgement.
- the time will be set at the instant that the last digit is sent; thus you may enter the module address, command and first 16 characters of the date and time, and finally enter the 19th character in sync with your reference clock. The current date and time may be determined using the 'L' command.

H Help

#HRH01H - a multiple line response with text similar to the first line of each command description in this document as the help line, with each line terminated <crlf> and final line terminated <crlfetx>, as follows:

Firmware ASIHRH24 v5.30
A - Address acknowledge	
B - Output both raw and cal
C - Output calibrated data
D - Set RT clock date/time: 'YYYY/MM/DD HH:MM:SS'
H - Display Help message
I - Report ID information
L - Report ID, serial #, firmware, cal info, clocks, SD directory
O - Report onboard system values: 3.3V, Vbat, Internal Temp
P - Enter polled test mode
Q - Request cal constants from HPS front-end
R - Output raw data
SD - SD Card access - password 'OK'
T - Enter test mode
U - Update EEPROM constants - password 'OK'
V - Output last hour averaged data
XMODE - XMODEM Dump SD Card via RS232 console

Note: 'SDOK' and 'XMODE' are not present unless an SD Card is installed.

I Report ID information

#HRH01I - displays the text information stored in EEPROM, with headers as follows, each line terminated in crlf:

    MODADR: ( 5 bytes text)         module address
    MODMFG: (16 bytes text)         module manufacturer
    MODMOD: (16 bytes text)         model number
    MODSER: ( 8 bytes text)         serial number
    MODDAT: ( 8 bytes text)         manufacture date
    SENMFG: (16 bytes text)         sensor manufacturer
    SENMOD: (16 bytes text)         model number
    SENSER: ( 8 bytes text)         serial number
    SENDAT: ( 8 bytes text)         manufacture date
    IFBRDREV: (16 bytes text)       front-end interface PC board name
    IFSFTREV: (24 bytes text)       front-end interface firmware & revision
    IFSERNUM: ( 8 bytes text)       front-end interface serial number
    IFDATE: ( 8 bytes text)         revision date
    CALFAC: (16 bytes text)         calibration facility
    CALPER: (16 bytes text)         calibration technician
    CALDAT: ( 8 bytes text)         calibration date
    DATFRM: (64 bytes text)         calibrated data output format
    DATDES: (64 bytes text)         calibrated data description
    DATUNI: (64 bytes text)         calibrated data units
    RAWFRM: (64 bytes text)         raw data output format
    RAWDES: (64 bytes text)         raw data description
    RAWUNI: (64 bytes text)         raw data units

the last scan sent is terminated by <crlfetx>.
NOTE: this information resides in EEPROM. Most items are completed at time of manufacturing test, but may be modified using the 'U'pdate command. Only module address is necessary for correct module operation.

L Report ID, serial #, cal info, etc.

the 'L' command provides miscellaneous status information about the module in a multi-line response. The number of lines in the response may vary depending upon the EEPROM and SD card status. Normally, after an initial <crlf>, these lines of info are provided, as follows:
#HRH01L

    module id from EEPROM<crlf>
    module serial number from EEPROM<crlf>
    firmware name and version from program FLASH<crlf>
    PC board name and revision from program FLASH<crlf>
    calibration date from EEPROM<crlf>
    current date and time from PIC24 RTCC<crlf>
    current date and time from DS3232 battery-backed RTC<crlf>
    RH% cal constants A, B, C, D<crlf>
    temperature cal constants A, B, C, D<crlf>
    SD Card found - display card status<crlf>		   
        
    - example normal response (with SD card installed):
    HRH01
    201
    ASHRH201 v5.30
    ASIPIC24 RevA
    1AUG13
    RTCC: 2013/07/24  11:55:11
    DS3232: 2013/07/24  11:55:12
    RH%: -8.65600e-01  2.48100e-03  6.06600e-08 -1.24400e-12
    RHT: -2.98700e+01  3.25900e-03 -6.81500e-08  1.69600e-12
    SD Card found
    2013-07-20 11:34:38             240 ASHRH201.ID
    2013-07-21 09:59:00            6144 ASHRH201.DAT
    2013-07-20 19:25:52             560 ASHRH201.INF
    SD Card formatted for this ASIMET module!

the last line is terminated by <crlfetx>.
NOTE 1: after initial startup, cal constants (which reside in the HPS24IF or VOSHPS sensor front-end) will not be displayed. The message "Use 'Q'uery command to get constants from HPS front-end" will be displayed. See 'Q' command below.
NOTE 2: if an SD card is installed, a message will indicate this and either OK or NOT LOGGING status
NOTE 3: if no SD card present, the last two lines will be replaced by "No SD card installed" message.

O Report onboard system values: 3.3V, Vbat, Internal Temp
- responds with several system values measured via the PIC24 on-board A/D converter. Displays the value of the 3.3 VDC rail, incoming power to the module (typically the external battery voltage), and the approximate internal temperature of the module from the board-mounted temperature sensor. For example:
  #HRH01O
```
3.31v, 13.62vbat,  22.8 degC :  827,  613,  364

	
```
- the line is terminated by <crlfetx>.
- the three values following the colon are the raw 10-bit A/D values; calibration for all values is hard-coded in the firmware currently.
P Enter polled test mode
- responds with individual scans of data in the 'B' command response format, except <crlf> terminator only. Upon receipt of any character except ESC, another scan of HRH data is sent. For example:
  #HRH01P
```
 
    52.020   22.275 :   16795   20255<crlf>
                   send <cr> (or other character)
    52.030   22.270 :   16798   20253<crlf>
                   send <cr> (or other character)
    52.037   22.270 :   16800   20253<crlf>
    .
    . 
		
```
- the command terminates on receipt of an ASCII ESC (1Bh) character. The last scan sent is terminated by <crlfetx>.
Q Query command retrieves cal constants from HPS24IF (or VOSHPS) sensor front-end.
- this command will take several seconds to execute; it must power up the HPS24IF board, wait for HPS24IF initialization, then request 2 sets of cal constants.
- the message "Requesting cal constants - " will be displayed immediately. After the above noted delays, the message "OK!" will be appended if successful, "FAILED!" if not successful.
- example:
  #HRH01Q Requesting cal constants - OK!
R Output raw value
- outputs raw 16-bit data values, as follows:
  RH%_counts TMP_counts<crlfetx>
- example:
  #HRH01R 16764 20246<crlfetx>
- C language format: "%7u %7u\r\n\x03"
SDOK Menu-driven SDHC card command operations
- Upon SDOK command entry, and between each command, you will see a prompt:
  Enter SD Card Cmnd, ? or H for Help:
- a request for Help returns this message followed by another prompt:
```
    SD Card Help (All commands end with Enter)

    D - Read the card Directory
    E - Erase a file
    F[W,R] - Write or Read the Info File
    H{?} - Help menu
    I - Initialize the SD Card for this module
    Q - Quit Flash operations
    S - Show ID file (HEX then ASCII)

    Enter SD Card Cmnd, ? or H for Help:
    
```
- description of SDOK Menu Commands:
  - D - displays a card directory
```
2013-07-20 11:34:38             216 ASHRH201.ID
2013-08-04 12:59:00            7168 ASHRH201.DAT
2013-08-04 09:25:52             512 ASHRH201.INF
       
```
  - E - erases a file. Prompts with:
    Erase a file (8.3 format max) ->
    Enter aborts; type a valid filename and enter to erase the file.
  - FR - reads the free-format ASCII contents of the info file, ASHRH201.INF
  - FW - prompts for up to 500 characters of user info; CTRL-C terminates entry into the info file, ASHRH201.INF
  - I - initializes the SD Card for use in the module. You must answer Y at the prompt or this command will abort. This initialization must be performed before the module will recognize the card and use it for data storage.
  - Q - quit Flash ops and return to logger command mode
  - S - display the contents of the ID file in HEX then ASCII. This file contains the current firmware version from program FLASH on the PIC24 micro, plus miscellaneous info from the EEPROM (as set via UOK command and displayed via I command). The current firmware version from program FLASH is compared with the version in the ID file to determine if the SD Card is initialized for use in the module.
- New SD Card Prep - when installing an SD Card for the first time, it must be initialized for use in the module. The "I" command, Initialize the SD Card for this module is used to prepare the SD Card for use. Three files will be created: ASHRH201.ID, ASHRH201.INF, and ASHRH201.DAT. Once initialization is complete, you can get a directory with a "D" command, or write user info into the ASHRH201.INF file with the "FW" command, then read the info file back with the "FR" command.
T Enter test mode
- responds with continuous scans of data in the 'B' command response format, except <crlf> terminator only. For example:
  #HRH01T
```
    52.020   22.275 :   16795   20255<crlf>
    52.030   22.270 :   16798   20253<crlf>
    52.037   22.270 :   16800   20253<crlf>
    .
    . 
		
```
- the command terminates on receipt of an ASCII ESC (1Bh) character. The last scan sent is terminated by <crlfetx>.
UOK Update EEPROM contents
- enters the update mode after confirmation of 'OK' password. New EEPROM values may be entered in this mode.
- upon initial entry, you must send the letters OK after the command or the command is ignored, e.g. #HRH01UOK. Upon receipt of the correct password, a set of prompts will be issued to allow entry of new module address, module manufacturer's info, sensor info, front-end interface info, calibration facility info, raw and calibrated output format info, HPS24IF calibration constants, display entire info area, and exit with or without update.
- the '0' choice for 'Exit without update' leaves the module RAM and EEPROM in its original state. The VOSHPS cal constants are handled separately, as these constants reside in VOSHPS EEPROM on the sensor front-end board.
- the '8' choice for 'Enter HPS24IF cal constants' passes commands through the ASIHRH24 CPU board to the HPS24IF sensor front-end board vis RS-485. There are some startup delays while the HPS24IF is powered up, as well as some half-duplex comms delays. After selecting '8' from the menu, it will take several seconds to get the 'OK' prompt from the HPS24IF (if it fails to respond, try again after the menu re-displays). At the OK prompt, you may read existing or write new cal constants only. Unrecognized commands will result in a 'Bad command' response. If you get stuck, enter 'Q' to quit VOSHPS update without making any changes. For complete details on the HPS24IF EEPROM Update command, see the document "HPS24IF Front-End Module Command Set".
- all responses to prompts must be terminated with <cr> (Enter)
  The final response from the module upon exit is <crlfetx>
- NOTE 1: Upon completion, the newly updated module address will not take effect until the next reset or power-up.
V Output the latest 1 hour average values
- outputs the average of the 1 minute values of the most recent hour.
- update is concurrent with the write to SD Card of the current hour's data at minute 59 of each hour.
- example:
  #HRH01V 76.163 23.514<crlfetx>
- see 'C' command for values and format
XMODE XMODEM Dump SD Card via console
- XMODE command only works in RS232 mode and only if an SD Card is installed
- SD Cards will take a LONG TIME to read this way - the preferred method of reading a large .DAT data file is to remove the SD Card from the module and read it on a PC. Three files will be recognized by the PC, the ASHRH201.ID containing ID info, the ASHRH201.INF INFO file which can contain up to 500 characters of user information, and the ASHRH201.DAT DATA file which contains the module data records. See the SDOK command above.
- This command is somewhat rudimentary; if you must dump data this way, use the L command to display the current directory and file sizes on the SD Card.
- On command entry, requests: Start record # (1 is first, 0 aborts) -> followed by: Number of records (default is 512) ->
  - i.e. to get first week of data (168 records -> 1 week), enter 1 as the start record, and 168 for the number of records.
  - add 168 to your start record number to find the start of subsequent week-long portions of data; i.e. if you entered 1 to start at the first record on the SD Card, subsequent weeks of data start at record 169, 337, 505, etc...
- Typical example - any terminal program capable of XMODEM transfer should work.
  - On entry, module will first prompt for start record:
    Start record # (1 is first, 0 aborts) ->
    Enter a valid record # (see discussion above)
  - followed by a prompt for number of records:
    Number of records (default is 512) ->
    Enter a valid sector count (see discussion above)
  - Next, you'll be prompted:
    Set terminal speed for 115200 then hit any key
  - After setting speed and hitting a key, you will see:
    XMODEM Send Function
    Waiting for start...
  - Start a transfer - on completion, you will see something like:
    Sent 25 records (100 xmodem blocks) - done
    Restore terminal speed to 9600 then hit any key
    NOTE:"blocks" here are XMODEM blocks of 128 bytes each
  - After resetting speed to 9600 baud and hitting a key, module will send a "\r\n"
  - Ignore occasional gibberish when changing baud rates!
- If you request more records than the data file contains, you will see a "Reached EOF" message before the final record and block tally.
- Note: Only the ASHRH201.DAT data file from the SD Card is dumped via XMODEM; Refer to SDHC Storage Format.

Revision history:

Original Release 19 Oct 2011 - for V5.01 (first instruments with SD Card capability)
Misc revisions - 22 Feb 2013
Revision for v5.3x - 29 Aug 2013 - filenaming and ID file structure changes