ST STSW-IDS002V1 Bedienungsanleitung

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

UM1752

User manual

UM1752 - Rev 3 - March 2019

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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UM1752 - Rev 3 page 2/23

Figure 4. STDES- ERH001D (power monitoring board, PMB): top and bottom

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UM1752 - Rev 3 page 3/23

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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Hardware setup

UM1752 - Rev 3 page 4/23

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

UM1752

STDES-IDS002V1

UM1752 - Rev 3 page 5/23

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.

UM1752

STDES-IDS003V1

UM1752 - Rev 3 page 6/23

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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Heater board

UM1752 - Rev 3 page 7/23

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

UM1752

Heater board

UM1752 - Rev 3 page 8/23

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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STSW-ISV002V1 Set-up

UM1752 - Rev 3 page 9/23

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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UM1752 - Rev 3 page 10/23

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