040000 tree e631556bd6245f796253794e9389c74d821176fc	boringssl
040000 tree f667ada51f6b4914586cf95a0c803b4ecf6a64c2	freertos
040000 tree 9fae156178317edce995b9147c6422da8dde840c	mbedtls
160000 commit 049485ff557178f646d573eca3bd647f543b760b	nanopb
040000 tree 0c9483d41bc1b5d076d051b626357e4022b36b3e	picotls
160000 commit 6455293368c5dd3a5a52b587ec5e74eb486dea8d	pigweed
040000 tree 30a8a35e3a0040ab62fa78f509257521fa1a09bc	stm32cubef4