A lot of effort has been spent over the past months verifying the stability of the system and making sure it is suitable for robust embedded systems. The new pyboard uses a Cortex-M7 which is a high-performance CPU and we needed to understand the full implications of the advanced features of this CPU and their interaction with the rest of the microcontroller system. We did see some issues when using the external QSPI flash in memory-mapped mode which have now been resolved.
For sensors, actuators and other add-ons we have designed a tile system around a 20-pin mezzanine connector. The base tile size is 12x12mm and they can be arranged in a grid. Current tiles include a 6×6 RGB LED array, a temperature/humidity/optical sensor, and a inertial sensor.
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