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Initial Release – Version 1.0

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@aKaReZa75 aKaReZa75 released this 28 Jun 04:19
· 15 commits to main since this release
V1.0
8010596

This is the first official release of the eBoard_M66, a shield-style development board designed for easy integration of the Quectel M66 GSM/GPRS module with Arduino-style microcontroller boards.

✅ Features:

  • Arduino UNO compatible header layout
  • Quectel M66 GSM/GPRS module with SIM card slot
  • u.FL connector for external antenna
  • Integrated level shifters for UART signals
  • Power supply filtering and ESD protection
  • Optimized PCB design for stable communication

🛠️ Status:

  • PCB has been fabricated, assembled, and tested
  • Board is functional and works as intended except for one major hardware flaw

⚠️ Known Issue in v1.0:

A critical hardware design flaw was identified during post-assembly testing:

  • The JP1 jumper must never be soldered or closed.
    If it is connected, the microcontroller will be permanently damaged due to incorrect control over the regulator’s EN (Enable) pin.
  • To resolve this in future versions:
    • The JP1 jumper will be removed entirely
    • The EN pin of the voltage regulator will be directly tied to VIN
    • The regulator should not be controlled via a microcontroller pin as it is currently implemented in v1.0

Note

These issues will be addressed in the upcoming hardware revision (v1.1).

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