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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.
@Gordon
Recent firmwares have a higher MTU of 53 which should at least double throughput. This post is 4 years old and I think last time I measured it was substantially higher.
I think you'll find it far quicker than HM-10, especially on UART TX where Espruino is able to push out multiple 53 byte packets per transmission interval at 7.5ms now