Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By eriksl
#93227
davydnorris wrote:This may be an Arduino limitation but I'm not an Arduino expert and I don't know how they wrap interrupts.

You could also try running the ESP at 160MHz instead - it has two clock speeds.

Other than that you may need to use a dedicated counter circuit

Indeed, that's why there is an arduino subsection on the board.