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

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By froussel
#90266 The esp8266 has only one analog input pin.
I would like to measure each value successively.
I saw a schema but I can't find it anymore. There were 2 mosfets (N or P) ordered by 2 IO
Can you explain to me please?
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By eriksl
#90270 I don't think you want to be using de internal ADC. It's very noisy and imprecise and hard to read out persistenly.

The best option is to connect an external ADC using e.g. I2C, but SPI or even I2S is possible.

If you want to try it with the internal ADC, the simplest way is to use an analog multiplexer, for example a CD4066.