Device Interface At The

IOT Configurator


IOT devices usually need to be modifiable with variables such as elevation for calculating air pressure or Thingspeak tokens for uploading measurements. The IOT Configurator service supplies device parameters as a set of name value pairs in JSON format that are used for configuring variables in an IOT device. The examples are for devices based on an ESP8266.

Getting Parameters

A device requests parameters by supplying a token as part of the URL . Tokens are 20 random characters made up of upper and lower case letters and numbers so as to be unguessable. For demonstration purposes there is a special short token of abcd so that the URL will return some parameters.

Getting Device Tokens

A token is supplied at the URL . For demonstration purposes there is a special DeviceID of 1234 that will return the special short token every time at the URL

Users register a Device ID through human interface. This is the number component of the device WiFi network SSID when using WiFi manager in an ESP8266 device. In that case it is a serial number unique to each ESP8266 device assigned during manufacture. The device requests a token using this number and stores the token in flash memory.

A token will be supplied only once for each device for a particular user. Subsequent requests for that device receive a device unknown response. This is so that tokens can not be discovered by third parties who know or can guess the Device ID. Even though the device has no knowledge of user accounts, one device can get seperate tokens associated with seperate user accounts or a device token can be reset on the server. A device would normally request a token only once so would also have to be reset to get a new token.

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