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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@allObjects
@ser156811
Regarding hooking up scope: mentioned only the device. But hooking it to Espruino Pico USART1 and transmitting something with 300 (or 316) bauds would also provide new information, mostly so if it will go down that low...
@Gordon mostlikely can answer that right away and would also know how accurate timing is across the bandwidth. I know that at very high frequencies differences between bit times are very course grain (see Espruino controlling LC resonance experiment in HAM Radio class, in particular, post #4).