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WCH CH340 USB-UARTs cost less than an RP2040 (and probably the external flash.) https://www.lcsc.com/search?q=CH340 https://www.lcsc.com/search?q=CH340 The re

by 15155 3y ago

WCH CH340 USB-UARTs cost less than an RP2040 (and probably the external flash.) https://www.lcsc.com/search?q=CH340 https://www.lcsc.com/search?q=CH340 The reason to use an RP2040 is that you need a little bit of logic with that UART.