PiCUS TMSO Manual
60
8.2 System Behavior
8.2.1 General
8.2.1.1 Priorities for Connections
The PTMSO is designed to adhere to a certain time regime. This means that the related
processes always have priority.
For you as a user this may have the following effect:
You try to establish a connection between your mobile phone and a TMSO.CU of an active
system. To do this you want to activate the BLE of the central unit, or you have already
activated it and even connected your telephone.
If the system is just finishing a cycle (measurement or sleep cycle) the execution of the
following communication process between the control unit and the sensors, as well as a
possibly planned online connection to load data into the cloud, has top priority.
This means that the central station will terminate an existing BLE connection and will not allow
any as long as this process is running. This can be seen from the display of the control panel.
While such a prioritized process is being executed, the
MEAS LED is
lit continuously.
Depending on the quality of the radio connections and the quantity of the measurement data
to be collected, this process can take up to approx. 10 minutes!
In this case just wait until the process is completed. The TMSO.CU will then start the next cycle
and all devices will enter the configured operating mode.
Then try to wake up the devices again and turn on the BLE connection.
8.2.1.2 Energy Supply
As with any other battery-powered device the PTMSO's runtime depends on energy
consumption. The system consumes the least energy when it is running in sleep mode.
All other activities consume more energy. These include, for example:
Measurements
Radio transmissions via TMSO Radio
Establishing an online connection
Data transfers to the cloud
The online connection via LTE consumes significantly more energy than via WLAN
In addition, the environmental conditions can influence the energy supply:
At low temperatures the batteries of the devices can temporarily lose up to 50% of their
capacity
Depending on the illumination of the solar cells the system is externally supplied with
energy and in the best case the batteries are recharged
This means the actual consumption of the system and thus the runtime depend on various
factors, some of which can be influenced by the configuration.
If the system is frequently instructed to measure (many measurement plans, over long
periods of time), consumption will inevitably increase.
This is by far the strongest influence!
If the cycle times are selected very short (measurement and sleep cycle in the expert
settings), data is exchanged more frequently between the devices via the TMSO radio,
thus also increasing consumption.
If the time period with which status updates are transferred to the cloud is chosen small,
consumption also increases.
