PCB Design of A LoRa Module Integrated with Sensor Devices
Khong, Cuong (2020)
Khong, Cuong
2020
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2020060416818
https://urn.fi/URN:NBN:fi:amk-2020060416818
Tiivistelmä
The aim of the thesis work was to design and implement a device for measurement of temperature, pressure and humidity of outdoor environments. The device will operate remotely in rural areas. This means that it should have low power consumption, require little maintenance and be able to withstand bad weather condition with a good protection.
The primary components of the device include a microcontroller ATmega2560, a sensor BME280 and a RF LoRa module. ATmega2560 is the main chip which controls the device. Meanwhile, the sensor monitors and records data from environmental variables. Then the RF LoRa module works as a radio module which transmits the collected data to a cloud server via the LoRa network provided by Digita. The device is powered by three triple-A batteries which are expected to last for a few months without replacement.
The end-product of this project did not meet the initial goal at the first prototype due to errors in the first design: Defective connections inside the schematic prevented the microcontroller from controlling the LoRa module. The schematic design has been revised and a second prototype is being assembled. However, due lack of time, the host company Arestech will take over the last stages of the project including testing of the device.
The primary components of the device include a microcontroller ATmega2560, a sensor BME280 and a RF LoRa module. ATmega2560 is the main chip which controls the device. Meanwhile, the sensor monitors and records data from environmental variables. Then the RF LoRa module works as a radio module which transmits the collected data to a cloud server via the LoRa network provided by Digita. The device is powered by three triple-A batteries which are expected to last for a few months without replacement.
The end-product of this project did not meet the initial goal at the first prototype due to errors in the first design: Defective connections inside the schematic prevented the microcontroller from controlling the LoRa module. The schematic design has been revised and a second prototype is being assembled. However, due lack of time, the host company Arestech will take over the last stages of the project including testing of the device.