Main components

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Part NumberDescription
STM32WB55CGUxSTMicroelectronics Arm Cortex-M4 MCU, 1024KB flash, 256KB RAM, 64 MHz, 1.71-3.6V, 30 GPIO, UFQFPN48
SHTC3Humidity and Temperature Sensor, +/-2%RH, +/-0.2degC, I2C, 1.62-3.6V, DFN-4

BLESEN schematic

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BLESEN board layout