In the last weeks focus of the work of "the embedded group" was debugging the PCB. The next step after preparing PCB was testing functionality of the different parts. In this stage some problems have been found by amplifier, so we spent couple of days looking from different perspectives to find out the problems. In this regard, we found one ground connection which was not properly soldered which caused problems. Now by solving this problem we could start with programing of the microcontroller.

On the meeting with Professor Rieger we discussed operation of the microcontroller. We have planned to connect sensor and micro SD-card reader to examine the whole process with sensors. Also we came to the point of adding two resistors. We need the resistors to shift average value of the output amplified signal due to the limited range of microcontroller power (0V-5V). We wish to have a ready prototype which we could connect with the project of the other group at the end of this month.

In recent weeks, the "PC-based" group has been working on improving the performance of their sensor system through a series of controlled experiments. To establish a reliable baseline, they conducted magnetic field measurements in dry conditions, which allowed them to analyze the system's performance without interference of external factors. After evaluating various options, they selected an epoxy lining for the larger box, which provides a protective barrier against water intrusion. In addition to water protection, the group members systematically analyzed potential sources of measurement error and discussed strategies to minimize them. Additionally, the hardware was improved in order to store the sensors and cables in a spatially efficient way ensuring their correct alignment.