https://home.roboticlab.eu/ 2026-04-05T08:43:43+00:00 https://home.roboticlab.eu/ https://home.roboticlab.eu/_media/wiki/logo.png text/html 2024-03-25T08:23:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb1a_1?rev=1711355014&do=diff STM_1A: Use of fan This scenario presents how to control the fan's rotation speed with a PWM signal. You can observe the rotation via the camera, but it would be rather hard to notice the change in the rotation speed. The fan is mounted on the top of the pressure tube and blows the air onto the pressure sensor. You can observe changes in sensor readings according to different fan speeds. How to use the sensor is shown in another scenario. text/html 2024-04-21T09:41:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb1b_1?rev=1713692479&do=diff STM_1B: Reading environmental data with a Bosch integrated sensor We will read environmental data using a BME 280 sensor in this scenario. It is one of the most popular sensors in weather stations. It integrates a single chip's digital thermometer, hygrometer (air humidity), and air pressure meter. In our laboratory equipment, this sensor is located inside the yellow pressure chamber, under the fan which can blow the air onto it. text/html 2024-04-21T11:25:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb2_1?rev=1713698712&do=diff STM_2: Using a digital potentiometer Digital potentiometer DS1803 is an I2C-controlled device that digitally controls the resistance between the outputs as in a real turning potentiometer. While in the turning potentiometers, there are wipers which are moving from minimal to a maximal value, in digital potentiometers there are no movable parts. Everything is implemented in a silicon. text/html 2024-04-22T17:27:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb3_1?rev=1713806877&do=diff STM_3: Use of integrated temperature and humidity sensor In this scenario, we will introduce a popular DHT11 sensor. The DHT series covers DHT11, DHT22, and AM2302. Those sensors differ in accuracy and physical dimensions but can all read environmental temperature and humidity. This scenario can be run stand-alone to read weather data in the laboratory nodes' room. The DHT11 sensor is controlled with one GPIO (in all our laboratory nodes, it is GPIO D22 or PB_2 in Nucleo-style numbering) and us… text/html 2024-04-22T17:56:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb4_1?rev=1713808590&do=diff STM_4: 1-Wire Temperature Sensor The temperature-only sensor DS18B20 uses a 1-wire protocol. “1-wire” applies only to the bidirectional bus; power and GND are on separate pins. The sensor is connected to the MCU using GPIO D0 only (PA_3 in Nucleo numbering). Many devices can be connected on a single 1-wire bus, each with a unique ID. Except plastic version, which we have in our laboratory (enclosure TO-92) text/html 2024-04-10T20:20:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb5_1?rev=1712780437&do=diff STM_5: Using LCD Display Alphanumerical LCD is one of the most popular output devices in the Embedded and IoT. Using LCD with predefined line organisation (here, 2 lines, 16 characters each) is as simple as sending a character's ASCII code to the device. This is so much simpler than in the case of the use of dot-matrix displays, where it is necessary to use fonts. The fixed organisation LCD has limits; here, only 32 characters can be presented to the user simultaneously. text/html 2024-04-20T13:34:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb6_1?rev=1713620085&do=diff STM_6: Using ePaper display VREL NExtGen laboratory node is equipped with b/w, ePaper module. It is a dot matrix display with a native resolution of 250×122 pixels. It has 64kB display memory and is controlled via SPI. The ePaper display presents data even if powered off, so don't be surprised that finishing your application does not automatically clean up the display, even if you use some other code later. To clean up the display, one has to clear the screen explicitly. text/html 2024-04-25T19:17:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb7_1?rev=1714072637&do=diff STM_7: Using OLED display This scenario presents how to use the OLED display connected to the STM32WB55 SoC. Our OLED display is an RGB (16bit colour, 64k colours) 1.5in, 128×128 pixels. The OLED chip is SSD1351, and it is controlled over the SPI interface using the pin configuration as described in STM32 node Hardware Reference in Table 1 STM32WB55 Node Hardware Details. text/html 2024-04-20T09:46:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb8_1?rev=1713606404&do=diff STM_8: Controlling Smart LED stripe A Smart LED stripe is a chain of connected digital LEDs (also referenced as NEOPIXEL) which can be individually controlled. The stripe in our lab equipment consists of eight RGB LEDs. There exist also other colour configurations such as RGBWW (Red+Green+Blue+Warm White+Cold White) or WWA (Warm White+Cold White+Amber). They are controlled with just one pin/GPIO. GPIO sends the digital signal to the first LED in a chain and the LED passes data to the next one, … text/html 2024-03-29T16:25:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb9a_1?rev=1711729557&do=diff STM_9A: Use of RGB LEDs This scenario presents how to handle the brightness control of the tri-coloured LEDs. One is observable via camera, as presented in the figure (component 9A), while another is hidden inside the black enclosure and lights a colour sensor (component 9B). Both LEDs are electrically bound and cannot be controlled independently. Those LEDs have 3 colour channels, controlled independently: R (Red), G (Green) and B (Blue). Mixing of those colours creates other ones, such as pin… text/html 2024-05-02T12:02:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb9b_1?rev=1714651364&do=diff STM_9B: Reading colour sensor A colour sensor (TCS 34725) can detect the brightness and colour of the light emitted. It works with the I2C bus. In our laboratory, the sensor has a fixed 0x29 address. The sensor is in the black enclosure, ensuring no ambient light impacts readings. The only light source is an RGB LED, controlled as described in the scenario text/html 2024-04-10T19:09:34+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/emb10_1?rev=1712776174&do=diff STM_10: Controlling standard servo You will learn how to control a standard miniature servo with the STM32 System on Chip. Standard miniature analogue servo is controlled with a PWM signal of frequency 50Hz with a duty cycle period between 1 ms (rotate to 0) and 2 ms (rotate to 180 degrees), where 1.5 ms corresponds to 90 degrees. Some servos have other duty cycle minimum and maximum values, always refer to the documentation. text/html 2024-04-27T08:15:55+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_1?rev=1714205755&do=diff STM_IoT_1: Reading MAC address of the WiFi Each network card is supposed to have a unique physical address called a MAC address. MAC abbreviation stands for Medium Access Control protocol, which provides access to the physical link in the network layer. The STM32WB55 SoC doesn't have a WiFi network controller so our STM laboratory stands have the WiFi module based on ESP32-C3 SoC connected by serial port additional ESP32-C3 module and controlled with AT commands. To learn how to use these comma… text/html 2024-04-27T08:15:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_2?rev=1714205726&do=diff STM_IoT_2: Connecting to the WiFi Access Point and presenting IP Each computer connected to the Internet is identified with the IP address. IP abbreviation stands for Internet Protocol, which is responsible for transmitting data packets between computers in the whole global web - the Internet. The same mechanism is used for addressing and transmitting packets among IP-capable IoT devices. The most popular local networks which support IP addressing are Ethernet and WiFi. Currently, the transitio… text/html 2024-04-27T09:42:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_3?rev=1714210962&do=diff STM_IoT_3: Connecting to the MQTT broker and publishing data In the following scenario, you will learn how to connect to the MQTT broker and publish a message. Prerequisites To implement this scenario, it is necessary to get familiar with at least one of the following scenarios first: text/html 2024-04-27T09:41:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_4?rev=1714210900&do=diff STM_IoT_4: Connecting to the MQTT broker and subscribing to the topic In the following scenario, you will learn how to connect to the MQTT broker and subscribe to the chosen topic to receive messages. Prerequisites To implement this scenario, it is necessary to get familiar with the LED controlling scenario: text/html 2024-05-04T08:41:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_5?rev=1714812089&do=diff STM_IoT_5: BLE Beacon This scenario presents how to create the Bluetooth Low Energy beacon device which periodically broadcasts a small amount of information, and the client device which can receive packets sent by the beacon. Beacons are usually used for sending useful information (eg. the web address of the owner, a link to the page with tourist information). In some cases, they simply send the identification number recognised by a dedicated mobile application allowing the users to localise t… text/html 2024-05-04T08:10:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_6?rev=1714810249&do=diff STM_IoT_6: BLE Communication with characteristics This scenario presents how to create the Bluetooth Low Energy server device and corresponding client device. The server can be the sensor device which responds to the client with the results of the measurements. This can also be the output device, which we can control writing the data to. The client connects to a server and reads the data. This scenario presents the use of the concept of services and characteristics. text/html 2024-05-04T11:03:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_7?rev=1714820594&do=diff STM_IoT_7: BLE Communication with indications This scenario presents how to extend the Bluetooth Low Energy server and client devices with a notification or indication mechanism for sending data automatically. If enabled, notifications or indications are sent at any time while the data in the server is updated. A difference between them is that a notification is an unacknowledged message while an indication is an acknowledged message. While one of them is enabled by the client, the server decid… text/html 2024-04-27T08:14:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/iot_at?rev=1714205650&do=diff STM_IoT_AT: Programming of the WiFi interface with AT commands The STM32WB55 SoC doesn't have a WiFi network controller so our STM laboratory stands have the WiFi module based on ESP32-C3 SoC connected by serial port and controlled with AT commands. In this scenario, you will learn how to use these commands. text/html 2025-10-03T11:28:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://home.roboticlab.eu/en/iot-open/practical/hardware/sut/stm32/scenarios?rev=1759490925&do=diff STM32 Laboratory Scenarios Know the hardware The following scenarios explain the use of hardware components and services that constitute the laboratory node. It is intended to seamlessly introduce users to IoT scenarios where using sensors and actuators is an intermediate step, and the main goal is to use networking and communication. Besides IoT, those scenarios can be utilised as part of the Embedded Systems Modules.