u8_t → uint8_t u16_t → uint16_t u32_t → uint32_t u64_t → uint64_t s8_t → int8_t s16_t → int16_t s32_t → int32_t s64_t → int64_t Prerequisite for #223 See: https://github.com/zephyrproject-rtos/zephyr/releases/tag/zephyr-v2.4.0 PR: #467