The Espruino firmware runs on a variety of STMicroelectronics STM32 devices. We sell the following development boards based on STMicroelectronics STM32 ARMs:
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STM32F103 | Espruino Original |
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STM32F401 | Espruino Pico |
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STM32F411 | Espruino WiFi |
However pre-built firmware is available for many other ST-based boards, or you can build firmware yourself: