Time Zone and DST

Hi Diana

May you tell me when exactly I should execute render/set_locale? After login and only one time or before/after each messages request/report execution?

Diana I have 2 other questions:

1. I see in documents that the flag can be 0,1 or 2 but the Wialon itself send flag 256. Please let me know what is that.

2. I call render/set_locale but when I put "formatDate":"%Y-%m-%E %H:%M:%S" and call it I receive error 4. Please let me know what I'm doing wrong.

http://hst-api.wialon.com/wialon/ajax.html?svc=render/set_locale&params={"tzOffset":134221328,"language":"fr","flags":256,"formatDate":"%Y-%m-%E %H:%M:%S"}&sid=SID

3. The case of time zone and daylight saving time confused me. As an example we have the Iran timezone and Iran daylight setting for a user:

A. We know that time zone is GMT+3:30 equal to +12600
B. We know that right know the daylight for Iran should be applied and the daylight offset is +1:00 which is equal to +3600
C. So now for this account we should have GMT+4:30 and in Wialon itself we see exactly same value in time current time section of bottom panel.

After we set mentioned time zone and daylight settings, we login with API as same user and we receive:

"prp": {
            "dst": "-1",
            "forceAddedDashboardTabOnce": "1",
            "fpnl": "monitoring",
            "geodata_source": "map_webgis",
            "hbacit": "{\"hb_mi_dashboard\":{},\"hb_mi_monitoring\":{\"l\":1},\"hb_mi_routes\":{\"l\":1},\"hb_mi_messages\":{\"l\":1},\"hb_mi_reports_ctl\":{\"l\":1},\"hb_mi_geozones\":{\"l\":1},\"hb_mi_drivers\":{\"l\":1},\"hb_mi_trailers\":{\"l\":1},\"hb_mi_tags\":{\"l\":1},\"hb_mi_jobs\":{},\"hb_mi_notifications\":{},\"hb_mi_users\":{},\"hb_mi_devices\":{},\"hb_mi_tools\":{},\"hb_mi_apps\":{}}",
            "hide_tl_promotion_tooltip": "1",
            "hpnl": "hb_mi_monitoring",
            "language": "en",
            "minimap_zoom_level": "15",
            "mont": "1",
            "monu": "[23582700,23662294,23745708,23753307,23881796,23886522]",
            "monuv": "[\"23662294\"]",
            "mtg": "1",
            "mu_fast_report_tmpl": "23978317_1",
            "mu_fast_track_ival": "0",
            "mu_tbl_cols_sizes": "ldt:256,0.22,0.26,0.26,0.26;ld:192,0.28,0.36,0.36;lt:192,0.28,0.36,0.36;dt:192,0.28,0.36,0.36;l:128,0.45,0.55;t:128,0.45,0.55;d:128,0.45,0.55;f:430,1",
            "notify_block_account": "0",
            "radd": "{\"w\":\"4\",\"c\":1,\"u\":23662294,\"a\":1,\"td\":1,\"s\":\"default\",\"f\":32}",
            "show_log": "0",
            "tz": "168571192",
            "umap": "g.vector@modern",
            "unit_extra_order": "1:connection,sensorValues,messageParams,customFields,profileFields,serviceIntervals,trailers,drivers",
            "us_addr_fmt": "1255211008_10_5",
            "us_addr_ordr": "1255211008"
        }

As you see the value for the parameters "dst" and "tz" are "-1" and "168571192" respectively.

first of all, I can't understand the value "-1" for "dst"

Then, if we do the calculation that is explained in http://sdk.wialon.com/wiki/en/sidebar/r … me/example as Reverse operation, we will reach to the value of +12600 (Equal to +3:30).
I expect +4:30, why +3:30? If it's correct then how we should find the daylight saving time? If the "dst" value was "+1" we could say sum these values and you will reach to +4:30, but now, I got confused.

Diana, thank you for your prompt response.

The response as you see says:

"tz": "168571192"

Please let me know how from 168571192 should we reach to  >>>  Iran timezone GMT+3:30 = 12600 and  DST time 0x0A0C0000 = 168558592 (dec)
Considering http://sdk.wialon.com/wiki/en/sidebar/r … me/example
Show me step-by-step calculation

Diana, let me ask my question another way. Simply, we receive "tz": "168571192" from an account. How to understand what is the Time Zone and DST from 168571192. How to calculate Time Zone and DST from 168571192. Is it clear?

Other questions are: what is what is the meaning of "dst": "-1" in login response? Which other values can have the "dst" parameter and what's the meaning of other values?