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- [2022-09-13: Meeting Notes](README.md#2022-09-13-meeting-notes)
- [2022-09-14: Hardware Components Research](README.md#2022-09-14-Hardware-Components-research)
- [2022-09-16: Meeting with Jack Kilby](README.md#2022-09-14-Meeting-With-Jack-Kilby)
## 2022-09-13: Meeting-Notes
Discussed with TA regarding our project proposal and our system and subsystem designs. Some things and suggestions to take note of:
- Add subcomponents for the cloud server for block diagram.
- Label necessary voltages at each power line for block diagram.
- Expand high-level requirement involving power to include 24-hour availability while the board is plugged in.
- Don't bother making your own Wi-Fi module; just buy one since budget is $150.
## 2022-09-14: Hardware-Components-research
Since we have a limited $150 budget, all of our purchases will most likely be limited to Amazon, Digikey, and Mouser. Parts we are leaning toward using:
- [ESP32-S3-MINI-1](https://www.espressif.com/sites/default/files/documentation/esp32-s3-wroom-2_datasheet_en.pdf)
- This ESP32 is versatile, not super expensive, offers various functionalities, and is used in many IoT projects, both hobbyist and professional.
- Furthermore, this microcontroller has been proven to be compatible with AWS.
- Currently, we aren't planning on integrating the 5 GHz frequency into the Radio Scanner Suite due to time constraints. The primary issue is that if we were to also scan 5 GHz, we would need to purchase a separate Wi-Fi module and write the drivers for it, which would take too much time and effort to integrate. So we plan on settling for 2.4 GHz frequency for our Wi-Fi module for now
- [USB-to-UART Bridge](http://esp32.net/usb-uart/): We need to make use of this bridge and attach it to our ESP-32.
- LiPo battery: safe, effective, efficient, and cheap. Moreover, the "ease and form factor" of LiPo batteries are a plus.
- [AP2112 Voltage Regulator](https://www.digikey.com/en/products/detail/diodes-incorporated/AP2112M-3-3TRG1/5305555) (3.3V): The ESP32 series of SoCs all use 3.3 volts as their operating voltage. Since all USB types generally operating at or above 5 volts, we need to drop the voltage down. 3.3 V is a very common voltage for these sort of scenarios
- [MCP73831T Battery Charge Controller](https://www.digikey.com/en/products/detail/microchip-technology/MCP73831T-2DCI-OT/1979804): mainly used to prevent overcharging