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Posts Tagged 'JSON'

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CEJSON – 5: IoT The JSON Parser

A detailed description of the CEJSON JSON Parser.

CEJSON – 4: IoT Version 1 Azure Mobile Service Tables

Version 1 AzMS Tables use an auto-incremented integer field as the primary key which is more compact than the GUID string used in version 2 AzMS tables.. The Azure Portal generates Version 2 tables which can be inefficient for resource limited embedded devices. This blog covers how to generate version 1 AzMS tables.

CEJSON-3: IoT and Azure Mobile Service Scripts

When an HTML POST/GET/PATCH/DELETE message is posted to an Azure Mobile Service Table, the message can be intercepted and modified. Also the response can also be intercepted and modified. This blog outlines how to do this.

CEJSON - 2: IoT on WEC 2013 with AzMS – CRUD Primitives

Delete and Update are now available for CEJSON. This means that the 4 CRUD primitives are now available.

CEJSON - 1: IoT on Windows Embedded Compact with Azure Mobile Services

Now available at https://cejson.codeplex.com can Post and Get Telemetry data to Azure Mobile Service.

Ardjson-Part 11: Using Flash to store print strings (Sketch V1.6).

In the previous blog in this series, using Flash for non-volatile program data was covered. One aspect of this was the F( ) macro that enables Serial.print/println strings to be accessed from Flash where the program is stored. That is, they do not consume RAM space allowing for more volatile programming space. This blog compares using and not using the F( ) macro. In the Telemetry sketch this allows for nearly double the number of name-value pairs

Ardjson-Part 10: Reducing RAM Usage – Permanent Storage

In the quest to reduce RAM usage with a RAM challenged Arduino device, this blog covers using permanent storage (Flash and EEPROM).

Ardjson-Part9b: Azure Mobile Services Scripts

In Part 9 of this series, it was shown how to create a Version 1 table such that the id field is an auto-incremented integer which saves storage space on a small device. Version 1 tables don't automatically save a creation and modification date. This blog covers how to do it with a Script.

Ardjson-Part 9: Azure Mobile Services Table id options (Sketch V1.5)

The default id field for a Azure Mobile Services Table, that the table is indexed on, is a string. By default the string that is auto-generated is a 36 character GUID string. This can be 3 or more times rest of the data sent as a HTTP Response to a default HTTP GET for each record from the Telemetry table . This blog discusses this issue and canvasses some options to resolve this overkill.

Ardjson-Part 8: Telemetry Code Sketch Version 1.4

This blog covers the major revision of the Telemetry to remove old, now unnecessary code, fix some bugs, further improve error responses, and a stored data structure that makes the parsed JSon data available after the HTTP Response processing is complete.

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