my project at: IOTsatcom project

I need help to decide if to add extra features or not, to be specific:

* Do you prefer a modular design or to have everything integrated on a single PCB board?

Please, could you give me your opinion answering this post?

In case, here are few ideas for the custom PCB board:

• Solar panel charger with maximum power point tracking (MPPT)

• LIPO battery fuel gauge

• ESP8266 WIFI mesh or acess point modes to gather extra wireless IOT sensors data

• GPS module for precise position and date

• RTC for keeping time during power down (..just with the add of a button battery and a quartz)

• external flash eeprom for data storage...not be used as a mass storage but just as telemetry backup

..please, add your brilliant idea into the comments