Investigation of MODBUS protocol latency in server-client scenario
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Date
Authors
Filipovska, Marija
Advisor
Referee
Mark
B
Journal Title
Journal ISSN
Volume Title
Publisher
Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
ORCID
Abstract
The aim of the proposed thesis is to test different free and open-sourced libraries for Modbus RTU on a simple test unit comprising a singular ESP32 client and two server units using low power Atmega chipsets. The aim of the thesis is to look at standardized baud rates over different libraries to determine the limits of both the protocol data transmission and read speeds to determine if it is the hardware or software that significantly can alter the behavior of the proposal. The initial assumption is that the low memory capabilities of Atmega pose a significant limitation if in such case the Modbus protocol functions with more than two units.
The aim of the proposed thesis is to test different free and open-sourced libraries for Modbus RTU on a simple test unit comprising a singular ESP32 client and two server units using low power Atmega chipsets. The aim of the thesis is to look at standardized baud rates over different libraries to determine the limits of both the protocol data transmission and read speeds to determine if it is the hardware or software that significantly can alter the behavior of the proposal. The initial assumption is that the low memory capabilities of Atmega pose a significant limitation if in such case the Modbus protocol functions with more than two units.
The aim of the proposed thesis is to test different free and open-sourced libraries for Modbus RTU on a simple test unit comprising a singular ESP32 client and two server units using low power Atmega chipsets. The aim of the thesis is to look at standardized baud rates over different libraries to determine the limits of both the protocol data transmission and read speeds to determine if it is the hardware or software that significantly can alter the behavior of the proposal. The initial assumption is that the low memory capabilities of Atmega pose a significant limitation if in such case the Modbus protocol functions with more than two units.
Description
Citation
FILIPOVSKA, M. Investigation of MODBUS protocol latency in server-client scenario [online]. Brno: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. 2025.
Document type
Document version
Date of access to the full text
Language of document
en
Study field
Power Systems and Automation
Comittee
doc. Ing. Miloslav Steinbauer, Ph.D. (předseda)
doc. Ing. Petr Drexler, Ph.D. (místopředseda)
Mgr. Přemysl Dohnal (člen)
prof. Ing. Eva Gescheidtová, CSc. (člen)
Date of acceptance
2025-06-20
Defence
Studentka obhájila bakalářskou práci. Komise neměla žádné námitky k řešené práci.
Studentka připravila odpovědi od oponenta a zodpověděla je bez výhrad.
Otázky komise:
Logický analyzér je tvořen softwarově? Jak se měřil přenos v softwaru PulseView? Bylo by možné použít nějaký jiný analyzér?
Identifikovala jste že je problém v použitém čipu? Jak jste tento problém objevila? Bylo by zajímavé otestovat i jiné čipy, aby se porovnaly výsledné hodnoty.
Result of defence
práce byla úspěšně obhájena