Vincenzo Emanuele Castellano's blog

[HW] Getting started: Speed measurement

Posted on: 14 January 2015
By: Vincenzo Emanue...

To measure speed we will use an Aimar ST650 connected to an Arduino.

The Aimar ST650 has a paddleweel with four asymmetrical, hydrodynamic blades and hall-effect magnetic sensor for high-level pulse output.

Connecting ST650 to an Arduino Board:

Bare cable to GND.
Red cable to +5V.
Green cable to pin A0.

This first basilar sketch will count paddlewheel’s complete rotations:

Image:

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Original

PDOException: SQLSTATE[42000]: Syntax error or access violation: 1142 INSERT command denied to user 'ms_osp'@'localhost' for table 'accesslog': INSERT INTO {accesslog} (title, path, url, hostname, uid, sid, timer, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7); Array ( [:db_insert_placeholder_0] => Vincenzo Emanuele Castellano's blog [:db_insert_placeholder_1] => blog/12 [:db_insert_placeholder_2] => [:db_insert_placeholder_3] => 3.228.21.204 [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => DO4l0rW2vvXR9LpLHrIf9vxDJjmaRVDR25hBJ59obE8 [:db_insert_placeholder_6] => 401 [:db_insert_placeholder_7] => 1594635247 ) in statistics_exit() (line 93 of /home/osp/public_html/drupal-7.34/modules/statistics/statistics.module).

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PDOException: SQLSTATE[42000]: Syntax error or access violation: 1142 INSERT command denied to user 'ms_osp'@'localhost' for table 'watchdog': INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 0 [:db_insert_placeholder_1] => php [:db_insert_placeholder_2] => %type: !message in %function (line %line of %file). [:db_insert_placeholder_3] => a:6:{s:5:"%type";s:12:"PDOException";s:8:"!message";s:888:"SQLSTATE[42000]: Syntax error or access violation: 1142 INSERT command denied to user &#039;ms_osp&#039;@&#039;localhost&#039; for table &#039;accesslog&#039;: INSERT INTO {accesslog} (title, path, url, hostname, uid, sid, timer, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7); Array ( [:db_insert_placeholder_0] =&gt; Vincenzo Emanuele Castellano&#039;s blog [:db_insert_placeholder_1] =&gt; blog/12 [:db_insert_placeholder_2] =&gt; [:db_insert_placeholder_3] =&gt; 3.228.21.204 [:db_insert_placeholder_4] =&gt; 0 [:db_insert_placeholder_5] =&gt; DO4l0rW2vvXR9LpLHrIf9vxDJjmaRVDR25hBJ59obE8 [:db_insert_placeholder_6] =&gt; 401 [:db_insert_placeholder_7] =&gt; 1594635247 ) ";s:9:"%function";s:17:"statistics_exit()";s:5:"%file";s:70:"/home/osp/public_html/drupal-7.34/modules/statistics/statistics.module";s:5:"%line";i:93;s:14:"severity_level";i:3;} [:db_insert_placeholder_4] => 3 [:db_insert_placeholder_5] => [:db_insert_placeholder_6] => http://osp.uniparthenope.it/?q=en/blog/12 [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => 3.228.21.204 [:db_insert_placeholder_9] => 1594635247 ) in dblog_watchdog() (line 163 of /home/osp/public_html/drupal-7.34/modules/dblog/dblog.module).

Vincenzo Emanuele Castellano's blog

[HW] Getting started: Wind speed measurement

[HW] Getting started: Speed measurement

Additional uncaught exception thrown while handling exception.

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Vincenzo Emanuele Castellano's blog

Additional uncaught exception thrown while handling exception.

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