Extra analog pins for esp8266 esp8266 12E
Posted: Tue Apr 05, 2016 12:16 pmDoes anyone know how to add extra analog pins to the esp8266 12E? My board only has one and I need two analog input pins. Thank you.
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Extra analog pins for esp8266 esp8266 12E
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Posted: Tue Apr 05, 2016 12:16 pmRe: Extra analog pins for esp8266 esp8266 12E
Posted: Wed Apr 06, 2016 3:40 amYou need to use an external ADC. There are plenty of such out there and they usually connect over I2C to your device.
Re: Extra analog pins for esp8266 esp8266 12E
Posted: Wed Apr 06, 2016 7:15 amIf you don't need high resolution, there is the 8 channels 8 bits ADC PCF8591 which also has 1 channel DAC.
If you need high res, than there is the MCP3421 or medium res MCP3021, but they are only 1 channel, you need to have an analog multiplexer such CD4051 to get multiple channels.
If you need high res, than there is the MCP3421 or medium res MCP3021, but they are only 1 channel, you need to have an analog multiplexer such CD4051 to get multiple channels.
Re: Extra analog pins for esp8266 esp8266 12E
Posted: Wed Apr 06, 2016 10:55 amDepending on your resolution needs the ADS1116 offers 8 channels of I2c access ADC