Data acquisition can be started using the GraphQL APIs. These GraphQL APIs can be accessed via http://xxx.xxx.xxx.xxx:8000/graphql where xxx.xxx.xxx.xxx is the IP address of your iQunet Server. You can open the GraphQL interface in your web browser or access the APIs using a client library in Python, Matlab, etc.
With the GraphQL APIs, you can manually start a recording, or you can enable automatic periodic measurements.
Manually recorded measurements
Each sensor type has a different command to start a recording.
a) Proximity Sensor
mutation {hallRunSetup(sensitivity: 128, macId: “20:ba:bd:9f”) {ok}}
Required arguments:
- numSamples,
- sensitivity, a unitless number between 0 (off) and 255 (highest sensitivity).
b) Inclination Sensor
mutation {tiltRunSetup(threshold: 0.0, numSamples: 255, guardRoll: 50, macId: “44:44:44:44”) {ok}}
Required arguments:
- tiltGuardRoll,
- tiltNumSamples,
- tiltThreshold.
c) Proximity Switch Sensor
mutation {reedRunSetup(numSamples: 31, macId: “f2:8e:cc:78”) {ok}}
Required arguments:
- numSamples, the number of transmissions before the sensor returns to sleep mode.
d) Vibration Sensor
mutation {vibrationRunSetup(sampleRate: 3200, formatRange: 16, threshold: 0.01, axis: “XYZ”, numSamples: 2048, macId: “e7:f9:6e:36”) {ok}}
Required arguments:
- sampleRate,
- formatRange,
- numSamples,
- axis,
- rms threshold.
Automatic measurements
The setQueueEnabled method enables the user to enable or disable automatic measurements on the specified sensor device.
mutation {setQueueEnabled(enabled: true, macId: “e7:f9:6e:36”) {ok}}
Required arguments:
- enabled: true to enable automatic measurements, false to disable automatic measurements.
The setQueueInterval method sets the auto-measurement interval of the specified sensor device.
mutation {setQueueInterval(interval: 120, macId: “e7:f9:6e:36”) {ok}}
Required arguments:
