ST STSW-IDS002V1 User manual

Introduction
This document describes the software graphic user interface designed to test the key features of the SPV1050 ultra low power
energy harvester and battery charger device.
It can be downloaded directly from www.st.com and supports the following demonstration kit and evaluation boards:
Table 1. Evaluation products supported by the software
STEVAL-ISV021V1: Energy harvesting demonstration kit based on SPV1050
STDES-IDS002V1: SPIDEr™ Autonomous wireless multi-sensor node powered by PV cells and based on SPV1050
STDES-IDS003V1: SPIDEr™ Autonomous wireless multi-sensor node powered by TEG and based on SPV1050
The pictures of evaluation boards listed above and of STDES- ERH001D (power monitoring board, PMB) are shown in
Figure 1. STDES-ERH003V1 (SPIDEr@ST™ with PV module): top and bottom, Figure 2. STDES-ERH001V1 (SPIDEr@ST™
with TEG): top and bottom, Figure 3. STEVAL-ISV021V1 (Energy harvesting module): top and bottom and Figure 4. STDES-
ERH001D (power monitoring board, PMB): top and bottom.
Please refer to the related databriefs for further details.
The dedicated software GUI (STSW-IDS002V1) displays in a very user-friendly way the SPV1050 features and system
performances to let users test the device in the real operating working condition.
The PMB has to be connected to the above mentioned boards in order to provide the electrical specification of energy
harvesting sources (PV module or TEG) and the power extracted from it, the battery operating voltage and current, the
conversion efficiency, the MPPT accuracy, the environmental irradiance or temperature, and the overall system power budget.
The next section describes the hardware setup and software configuration to perform measures and tests.
STSW-IDS002V1: GUI for for STEVAL-ISV021V1, STDES-IDS002V1 and
STDES-IDS003V1 evaluation boards
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User manual
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For further information contact your local STMicroelectronics sales office.
www.st.com

1Evaluation board photos
Figure 1. STDES-ERH003V1 (SPIDEr@ST™ with PV module): top and bottom
Figure 2. STDES-ERH001V1 (SPIDEr@ST™ with TEG): top and bottom
Figure 3. STEVAL-ISV021V1 (Energy harvesting module): top and bottom
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Figure 4. STDES- ERH001D (power monitoring board, PMB): top and bottom
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2Hardware setup
2.1 STEVAL-ISV021V1
Connect the PMB through the USB cable to the PC first and then connect the STEVAL-ISV021V1 to it as shown
in Figure 5. STEVAL-ISV021V1 and PMB connection. It's strongly recommended to not connect the PMB to the
STEVAL-ISV021V1 if it is not yet powered by the USB cable as its current draining could damage the battery on
the board.
Figure 5. STEVAL-ISV021V1 and PMB connection
Check jumper position on bottom side of the STEVAL-ISV021V1. In order to supply the system by the on board
PV panel, close pins 2-3 of J4 and leave open CN1. When the STEVAL-ISV021V1 is connected to PMB, the
jumpers J5, J6 and J7 must be positioned on the right (close pins 2-3), as shown in Figure 6. Jumpers positioning
on bottom side of STEVAL-ISV021V1.
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Figure 6. Jumpers positioning on bottom side of STEVAL-ISV021V1
2.2 STDES-IDS002V1
Connect the PMB through the USB cable to the PC first and then connect the STDES-ERH003V1 to it as shown
in Figure 7. STDES-ERH003V1 and STDES-ERH001D connection. It's strongly recommended to not connect the
PMB to the STDES-ERH003V1 if it is not yet powered by the USB cable as its current draining could damage the
battery on the board.
Figure 7. STDES-ERH003V1 and STDES-ERH001D connection
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Check jumper position on bottom side of the STEVAL-IDS002V1. In order to supply the system by the on board
PV panel, close pins 2-3 of J7 and leave J4 open. When STDES-ERH003V1 is connected to PMB, the jumpers J5
and J6 must be left open, as shown in Figure 8. Jumpers positioning on bottom side of STDES-ERH003V1.
Figure 8. Jumpers positioning on bottom side of STDES-ERH003V1
2.3 STDES-IDS003V1
Connect the PMB through the USB cable to the PC first and then connect the STDES-ERH001V1 to it as shown
in Figure 9. STDES-ERH001V1 and STDES-ERH001D connection. It's strongly recommended to not connect the
PMB to the STDES-ERH001V1 if it is not yet powered by the USB cable as its current draining could damage the
battery on the board.
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Figure 9. STDES-ERH001V1 and STDES-ERH001D connection
Check jumper position on top side of the STDES-ERH001V1. In order to supply the system by the on board TEG,
close pins 2-3 of J7 and leave J4 open. When the STDES-ERH001V1 is connected to the PMB, the jumpers J5
and J6 must be left open, as shown in Figure 10. Jumpers positioning on top side of STDES-ERH001V1.
Figure 10. Jumpers positioning on top side of STDES-ERH001V1
2.4 Heater board
The TEG mounted on the STDES-ERH001V1 board provides an easy access to the cold or hot plate to create a
gradient temperature across the two TEG plates. In fact, the second one is generally at ambient temperature. In
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order to heat up the exposed surface of the TEG, the Peltier cell based heating module can be used. The module
is not included in the box, but it represents a very immediate tool to quickly warm up the accessible plate of TEG.
It is supplied through its USB cable which has to be connected to a PC. Make sure that the Peltier cell surface is
in contact with the TEG surface located on the bottom side of the STDES-ERH001V1 to guarantee the maximum
heat transfer as shown in Figure 11. Peltier cell heating surface and bottom view of the STDES-ERH001V1 with
exposed TEG plate surface.
Figure 11. Peltier cell heating surface and bottom view of the STDES-ERH001V1 with exposed TEG plate
surface
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3STSW-ISV002V1 Set-up
Install and launch the STSW-ISV002V1 in your PC/laptop.
In the next sections it's reported how to perform the conversion efficiency measurement and the MPPT accuracy
calculation.
3.1 Efficiency measurement and MPPT accuracy calculation using the STDES-
ERH003V1 or the STEVAL-ISV021V1
Once the STDES-ERH003V1 or the STEVAL-ISV021V1 hardware setup is completed and the STSW-IDS002V1
GUI file runs, the following actions has to be taken:
1. Select the “Efficiency Tab”
2. Click “Connect” on PMB panel (highlighted by “1” in Figure 12. Efficiency tab: PV module curve with
efficiency and MPPT data)
3. Select “Solar Efficiency” in the drop-down box in the bottom right side (highlighted by“2” in
Figure 12. Efficiency tab: PV module curve with efficiency and MPPT data)
4. Click on “VOC Calc” button (highlighted by “3” in Figure 12. Efficiency tab: PV module curve with efficiency
and MPPT data). This is necessary only thefirst time the GUI starts and whenever the lighting conditions
change
5. After 20 seconds, efficiency conversion and system power budget will be displayed inthe right side table
(highlighted by “4” in Figure 12. Efficiency tab: PV module curve with efficiency and MPPT data)
Figure 12. Efficiency tab: PV module curve with efficiency and MPPT data
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In the graph is depicted the real power-voltage characteristic curve of the PV panel at the current light intensity,
the ideal maximum power point (blue dot), and the real operating maximum power point (green dot). Furthermore,
in the table some data are listed as following:
• Input power extracted from the PV panel
• Output power carried out to the battery
• Conversion efficiency (output power / input power)
• Ambient light intensity
• MPPT accuracy (real maximum power / ideal maximum power)
• Open circuit voltage of the PV panel
To perform a faster evaluation it is possible to push on the “Calculate” button. In this case the evaluation time is
only 2 seconds instead of 20 seconds as previously. By performing this action the open circuit voltage Voc is not
detected, and then the P-V curve is determined starting from the ambient light intensity data. This method is faster
but it introduces a small measurement error on efficiency measurement. Also, the “Power Visualization” tab
(Figure 13. Power visualization tab) allows displaying the measures of other quantities like PV module and battery
voltage and current. In particular:
• On channel 1 the V and I profiles of the panel are plotted as a function of time
• On channel 2 the V and I profiles of the battery are plotted as a function of time
• On Channel 3 the output V and I profiles of the ambient light sensor are plotted as a function of the time
Figure 13. Power visualization tab
3.2 Efficiency measurement using the STDES-ERH001V1
Once the STDES-ERH001V1 hardware setup is completed and the STSW-IDS002V1 runs, the following actions
has to be taken:
1. Select the “Efficiency tab”
2. Click on “Connect” button in PMB panel (highlighted by “1” in Figure 14. Efficiency tab: TEG module curve
with efficiency and MPPT data)
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3. Select “Thermal Efficiency” in the drop-down box in the bottom right side (highlighted by “2” in
Figure 14. Efficiency tab: TEG module curve with efficiency and MPPT data)
4. Click on “VOC Calc” button (highlighted by 3 in Figure 14. Efficiency tab: TEG module curve with efficiency
and MPPT data)
5. After 20 seconds, efficiency conversion and system power budget will be displayed in the right side table
(highlighted by 4 in Figure 14. Efficiency tab: TEG module curve with efficiency and MPPT data)
Figure 14. Efficiency tab: TEG module curve with efficiency and MPPT data
In Figure 14. Efficiency tab: TEG module curve with efficiency and MPPT data is depicted the real power-voltage
characteristic curve of the TEG at the actual temperature gradient between its two hot and cold plate, the ideal
maximum power point (blue dot), and the real operating maximum power point (green dot).
Furthermore, in the table some data are listed as following:
• Input power extracted from the TEG module;
• Output power carried out to the battery;
• Conversion efficiency (output power / input power);
• Temperature gradient;
• MPPT efficiency (real maximum power / ideal maximum power);
• Open circuit voltage of the TEG module;
Note: The current software GUI release does not support the “Calculate” button feature when using the STDES-
ERH001V1
Like with PV solar cell, also when using the STDES-ERH001V1 the “Power Visualization” tab (Figure 13. Power
visualization tab) allows displaying the measures of other quantities like PV module and battery voltage and
current. In particular:
• On channel 1 the V and I profiles of the TEG are plotted as a function of time
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• On channel 2 the V and I profiles of the battery are plotted as a function of time
• On channel 3 the output V and I profiles of the temperature sensors are plotted as a function of the time.
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4Wireless sensor node configuration and data transmission
This section describes the configuration of the STDES-IDS002V1 and STDES-IDS003V1 (SPIDEr@ST), how to
perform the data reading of environmental sensors and the transmission of data through wireless interface. By
default, only the temperature sensor and the air pressure sensor are enabled, and related data are transmitted
every 20 seconds. Position of USB connector and switches used are shown in Figure 15. STDES-ERH003V1 and
STDES-ERH001V1: connector positioning.
Figure 15. STDES-ERH003V1 and STDES-ERH001V1: connector positioning
In order to load a different configuration, please refer to the picture below and apply the listed steps.
1. Physically connect the STDES-IDS002V1 or the STDES-IDS003V1 board to the PC through the micro-USB
cable.
Figure 16. Micro USB connector
2. Launch the STSW-IDS002V1 and click on “Configuration” tab (see Figure 16. Micro USB connector)
3. Click “Connect” on SPIDEr TX board panel after disconnecting the PMB panel first (if it was connected
before) (highlighted by 1 in Figure 16. Micro USB connector)
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4. Select a pre-loaded configuration (sensor type: accelerometer, temperature, pressure and transmission
period) (highlighted by 2 in Figure 16. Micro USB connector)
5. Click on “Write” button (highlighted by 3 in Figure 16. Micro USB connector)
6. Click “Disconnect” on "SPIDEr TX" board panel (highlighted by 1 in Figure 16. Micro USB connector)
7. Physically disconnect the STDES-ERH003V1 or the STDES-ERH001V1 board and the micro-USB cable
from the PC
Figure 17. Wireless sensor node configuration
At this stage the selected configuration is loaded into the node. To start data transmission, enable the supply
voltage to the node through the LDO2 switch as shown in Figure 18. STDES-ERH003V1, LDO2 Switch:
ENABLED (left) and DISABLED (right) and Figure 19. STDES-ERH001V1, LDO2 Switch: DISABLED (left) and
ENABLED (right) (STDES-ERH003V1 and STDES-ERH001V1, respectively).
Figure 18. STDES-ERH003V1, LDO2 Switch: ENABLED (left) and DISABLED (right)
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Figure 19. STDES-ERH001V1, LDO2 Switch: DISABLED (left) and ENABLED (right)
Once LDO2 switch is enabled the sensor node is active and starts transmitting data.
4.1 Reading data
In order to receive the transmitted data, the STDES-ERH002V1 receiver board must be physically connected to
the PC through the A-B type USB cable as shown in Figure 20. STDES-ERH002V1 RX board and A-B type USB
connector to PC
Figure 20. STDES-ERH002V1 RX board and A-B type USB connector to PC
Once connected the receiver the following steps must be followed (refer to Figure 21. Data Visualization tab):
1. Launch the STSW-IDS002V1 and click on “Data Visualization” tab
2. Disconnect the PMB board or the transmitter board
3. Click on “Read Radio Data” button
4. Data are shown in the related graphs along with node supply voltage and current, battery voltage and
current, and RF radio signal power
5. Click on “X” button at the bottom right side of Data Visualization tab to stop data acquisition.
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Figure 21. Data Visualization tab
4.2 Overall system efficiency and power budget
Overall system efficiency can be calculated during wireless sensor node working time also. In this case it will be
significantly lower than in stand-by mode (no switching condition) because the sensors, the microcontroller and
the transmitter are sinking current.
Nevertheless in such mode it is possible to check if the overall energy balance is positive or not or, in other words,
if the energy harvested from the source is enough to supply the node or if it's draining current from the battery
also. In order to calculate the total power budget, please follow the steps listed below (refer to Figure 18. STDES-
ERH003V1, LDO2 Switch: ENABLED (left) and DISABLED (right)):
Step 1. Launch the STSW-IDS002V1 and select the “Power Visualization” tab
Step 2. Disconnect the transmitter board if previously connected, and then click on “Connect” button of PMB
panel
Step 3. Select Channel 2 only
Step 4. Select an acquisition time value (which is multiple of node transmission time)
Step 5. Click on “Start” button
Step 6. After finishing acquisition, select the “current values” sub-tab (refer to Figure 22. Power Visualization
tab)
Step 7. Select channel 2 and then click on “Calculate” button (refer to Figure 22. Power Visualization tab)
Step 8. The “Mean Power” box will show the value and the sign of mean power, and if the energy balance is
positive or negative
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Figure 22. Power Visualization tab
Finally, it is possible to use the STDES-IDS002V1 and the STDES-IDS003V1 as standalone wireless sensor node
and the STEVAL-ISV021V1 as stand-alone battery charger, which means without connecting the PMB. In this
case the correct jumper positions are shown in Figure 23. Jumper positions for the STDES-ERH003V1 (left) and
STDES-ERH001V1 (right) in stand-alone mode and Figure 24. Jumper positions for the STEVAL-ISV021V1 in
stand-alone mode, and described below:
For STDES-ERH003V1
• Leave J4 open and close pins 2-3 of J7 to supply the system by the on board PV panel
• Close pins 1-2 of J5 to bypass the input sampling circuitry of PMB
• Close pins 1-2 of J6 to bypass the output sampling circuitry of PMB
For STDES-ERH001V1
• Leave J4 open and close pins 2-3 of J7 to supply the system by the on board PV panel
• Close pins 1-2 of J5 to bypass the input sampling circuitry of PMB
• Close pins 1-2 of J6 to bypass the output sampling circuitry of PMB
For STEVAL-ISV021V1
• Leave CN1 open and close pins 2-3 of J4 to supply the system by the on board PV panel
• Close pins 1-2 of J5 to bypass the input sampling circuitry of PMB
• Close pins 1-2 of J6 to bypass the output sampling circuitry of PMB
• Close pins 1-2 of J7 to bypass the ambient light sampling circuitry of PMB
In case the PMB is not connected, please note that efficiency, MPPT accuracy and input and output power data
cannot be displayed.
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Figure 23. Jumper positions for the STDES-ERH003V1 (left) and STDES-ERH001V1 (right) in stand-alone
mode
Figure 24. Jumper positions for the STEVAL-ISV021V1 in stand-alone mode
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Revision history
Table 2. Document revision history
Date Version Changes
29-Apr-2014 1 Initial release.
20-May-2015 2 Added: Figure 19
04-Mar-2019 3
Updating to align the document to the the new boards names:
STEVAL-IDS003V1 → STDES-ERH001V1;
Transmitter board → STDES-ERH002V1;
Power monitoring board → STDES-ERH001D;
STEVAL-IDS002V1 → STDES-ERH003V1;
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Contents
1Evaluation board photos...........................................................2
2Hardware setup....................................................................4
2.1 STEVAL-ISV021V1 .............................................................4
2.2 STDES-IDS002V1..............................................................5
2.3 STDES-IDS003V1..............................................................6
2.4 Heater board ..................................................................7
3STSW-ISV002V1 Set-up ............................................................9
3.1 Efficiency measurement and MPPT accuracy calculation using the STDES-ERH003V1 or
the STEVAL-ISV021V1..........................................................9
3.2 Efficiency measurement using the STDES-ERH001V1 ..............................10
4Wireless sensor node configuration and data transmission .......................13
4.1 Reading data .................................................................15
4.2 Overall system efficiency and power budget .......................................16
Revision history .......................................................................19
Contents ..............................................................................20
List of tables ..........................................................................21
List of figures..........................................................................22
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