WCH has a bunch of new ones that have come out recently, like the CH32V003 and CH32V307 [1]. I would start there, they are close enough and could probably run m

WCH has a bunch of new ones that have come out recently, like the CH32V003 and CH32V307 [1]. I would start there, they are close enough and could probably run micropython since they have some that have reasonable amounts of SRAM. I think they are mostly looking to replace STM32s though. [1] http://www.wch-ic.com/products/CH32V003.html http://www.wch-ic.com/products/CH32V003.html