Heltec LoRa Node L151

• features a STM32L151CCU6 + SX1276

==> initial support at https://github.com/fthiebolt/LoRa-boards-stm32duino

Bonjour Frederic,
After having added support to BSFrance LORAM3 L151 board for my university :), I started the same with Heltec LoRa Node L151: i then noticed a weird GPIO behaviour when applying proper product_line: STM32L151xC ... but this wrong behaviour disappear when setting STM32L151xB product line for this STM32L1R1CC device ?!?!
Thanks.
François

Note that user can add a STM32 based board following this wiki

Any contribution is welcome, so do not hesitate to submit a PR.