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Version 1.0 release notes

Summary

This release completes the planned functionality for the node, hence the major change to the version number. The main addition over the last release is the ability to calibrate the electrical conductivity sensors.

Known issues/limitations

  • Date and time: The node currently attempts to obtain the date and time from the wifi network. Setting the date and time in configuration mode therefore has no effect.
  • Battery indicator: The battery indicator has been disabled. The plan is to reinstate it in a later release.
  • Top-layer sensor readings: Because it was not possible to modify the top-layer sensor unit to add a switch, the sensitivity of the pH and EC sensors at that layer is reduced compared to the other layers.
  • Temperature compensation: PH and EC sensor readings are affected by changes in temperature. The current code does not apply temperature compensation. This will be included in a later release; however, the adjustments will be small within the temperature range expected in the GrowCubes. Any gains in accuracy with temperature compensation are likely to be negligible.
  • Log files: Although log files are now created, they are difficult to access. In a later release, the code will be modified so tht the log files are automatically uploaded to the server so that they can ve viewed in the Dandelion app.
  • Options menu: The options menu appears on startup regardless of whether that is the result of a manual reset or waking up automatically from deep sleep. It will be suppressed in the deep sleep case in a future release.
  • WPA2 wifi support: Some local authorities employ the WPA2 Enterprise wifi authentication method which requires a username and password to join the network. This is not currently supported but will be investigated for a future release. In the meantime, the workaround is to use a mifi device or a mobile hotspot as suggested on the Configuration page.