Technical University "Gh. Asachi" Iași - Faculty of Automatic Control and Computer Science
Microprocessor Systems
Pico
Experiment No.11+
E11+.1 Title:


Pico GSM - control actions over very long distances



MIT spinOFF List


E11+.2 General presentation/purpose:


The laboratory experiment aims to provide a development version of an active core capable of communicating in GSM networks for M2M applications. It follows the realization of an example of an embedded system project capable of being exploited in Spin OFF-type systems. At the end of the laboratory you will have detailed information about the use of Pico platforms with GSM modems and AT commands to build applications capable of delivering alert/command SMS messages in GSM networks on a planetary scale.

Meanwhile: GEMINI


E11+.3 Resources:


Rpi Pico platforms, Nokia LCD, GSM Modem SIM800L EVB, flame sensor, high power RGB LED, ULN2803


E11+.4 Prototype program sources:


Flame send SMS



SMS control RGB LED



E11+.5 How to conduct/track the experiment:

- Analyze the GSM extension schematic shown in the figure below:



- Explore the AT commands for SMS;
- Build a project with the prototype program and follow execution on the Rpi Pico platform;
- Solve the proposed problems;
To ensure the high current consumption of the GSM module during communications, it is necessary to add electrolytic capacitors as shown in the image below.



E11+.6 Proposed problems:

  • 1. Create a program sequence that will send an SMS to 2 phone numbers;

  • 2. Create a program sequence that will send an SMS with the supply voltage value of the RP2040 processor;

  • 3. Create a program sequence that will allow visualization in the terminal application of the AT commands sent to the modem;
  • 4. Highlight the electromagnetic disturbances introduced by the GSM modem transmission module;

  • 5. Create a program that will send AT commands to the GSM modem without using sleep-type functions;


E11+.7 The experiment can be extended to:

Development of GSM telemetry applications;
Development of active nodes for the Internet of Things;
Development of applications on M2M structures;
Interconnecting equipment over very long distances;



E11+.8 Additional information:
© 2024 - Fl. Pantilimonescu, Faculty of Automatic Control and Computer Science