Building an ESP8266 with multiple pressure sensors (using ADS1115 and ESPHome)

Thanks @tom_l, any suggestions between using high and low impedance resistors for the resistor divider? I measured the impedance of the sensor output and it comes in around 380kΩ.

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I was thinking that if VS is 5V, I can make R1 1kΩ and R2 2kΩ, then the output voltage will be 3.33V… then I looked at my stock and I have:

  • 330Ω
  • 560Ω
  • 10kΩ
  • 30kΩ

So, right now I could create R1=330Ω, R2=560Ω where VOUT[max]=3.14V. Otherwise, it seems that I’ll have to order new resistors. Doesn’t seem like a good idea to put such a low resistance on the output of this sensor because it’ll pull it down the voltage. Any suggestions on a best approach for the divider?

Maybe I should just bite the bullet and go for the digital level shifter…