RedBear Duo (now under


I’ve ported uLisp to RedBear Duo which uses Particle OS.


Nice work! If, like me, you weren’t familiar with this board, it’s based on an STMicroelectronics STM32F205 ARM Cortex-M3 @120MHz, and has 128 KB SRAM and 1MB Flash. It supports Wi-Fi 802.11n (2.4GHz only) + Bluetooth 4.1 (Dual Mode):


It’s available from Seeed Studio: RedBear DUO.


I made interaction with lisp possible via the Particle cloud:

The call back is defined in the lisp library (it’s a simple loopback now) and the local REPL is still running!