ADC.md: state that AdcParam is now superseed by adcGpio

docs/ADC.md

@@ -54,6 +54,8 @@ Example: ADC as `Light (3)`
 
 ### Commands
 
+**Beware:  From Tasmota version 14.2, the AdcParam command has been superseded by the similar AdcGpio command.  AdcParam still works, but it is now considered obsolete.  This documentation wil be updated for AdcGpio soon.**
+
 Command|Parameters
 :---|:---
 AdcParam<x\><a class="cmnd" id="adcparam"></a>|[ADC](ADC) analog input tuning parameters. On ESP32 x is channel `1..8`, and the input max is 4095 instead of 1023 as used below.<br>`<sensor>, <param1>, <param2>, <param3>,  <param4>`<BR>`<sensor>` values:<br>&emsp; `2` = Temperature [Steinhart-Hart thermistor equation](https://en.wikipedia.org/wiki/Steinhart%E2%80%93Hart_equation) parameters:</li><ul>`<param1>` = NTC Voltage bridge resistor in Ohms *(default = `32000`)*<br>`<param2>` = NTC Resistance in Ohms *(default = `10000`)*<BR>`<param3>` = NTC Beta Coefficient *(default = `3350`)*</li></ul><br>&emsp; `3` = Light [Lux equation](https://www.allaboutcircuits.com/projects/design-a-luxmeter-using-a-light-dependent-resistor/) parameters:</li><ul>`<param1>` = LDR Voltage bridge resistor in Ohms *(default = `10000`)*<BR>`<param2>` = LDR Lux Scalar *(default = `12518931`)*<BR>`<param3>` = LDR Lux Exponent *(default = `-1.4050`)*</li></ul><br>&emsp; `6` = ADC linear range remapping parameters:</li><ul>`<param1>` = input range low value `adcLow` *(default = `0`)*<BR>`<param2>` = input range high value `adcHigh` *(default = `1023`)*<BR>`<param3>` = output range low value `rangeLow` *(default = `0`)*<BR>`<param4>` = output range high value `rangeHigh` *(default = `100`)*<BR>The range remapping perform the following calculation on the ADC value *[0..1023]*:<BR>`Range = ((adcHigh - ADC) / (adcHigh - adcLow)) * (rangeLow - rangeHigh) + rangeHigh`<br>*The calculation is performed in double resolution floating point, but the output is a signed integer. All 4 input parameters are unsigned 16 bit integers.*<BR>Example to convert the ADC value on a D1-mini into millivolts (using the default resistor bridge of 220k/100k):<BR>`AdcParam 6, 0, 1023, 0, 3200`</li></ul><br>&emsp; `7` = CT POWER parameter adjustments:</li><ul>`<param1>` = ANALOG_CT_FLAGS (default 0 for a non-invasive current sensor). When value is `>0` it sets the `adcLow` value as base for the measurement via OpAmp differential amplifier.<BR>`<param2>` = ANALOG_CT_MULTIPLIER ( 2146 = Default settings for a (AC) 20A/1V Current Transformer.) multiplier\*100000 to convert raw ADC peak to peak range 0..1023 to RMS current in Amps. Value of 100000 corresponds to 1<BR>`<param3>` = ANALOG_CT_VOLTAGE (default 2300) to convert current in Amps to apparent power in Watts using voltage in Volts/1000. Use value 0.220 for AC220V or 0.012 for 12VDC.<BR>`<param4>` minimum current threshold (AC only, optional, default 0). Current measured below this value will be forced to 0.0. Used to void measurment noise when load is null.<BR>Exemple for DC: `AdcParam 7,406,3282,0.012`<BR>Exemple for AC: `AdcParam 7,0,2146,0.230,0.060`<BR>See circuit diagram [below](#adc_ct-circuit)</li></ul><BR>&emsp; `9` = ANALOG_PH parameter adjustments:</li><ul>`<param1>` = ANALOG_PH_CALSOLUTION_LOW_PH (default 4.0).<BR>`<param2>` = ANALOG_PH_CALSOLUTION_LOW_ANALOG_VALUE ( default 282 )<BR>`<param3>` = ANALOG_PH_CALSOLUTION_HIGH_PH (default 9.18).<BR>`<param4>` = ANALOG_PH_CALSOLUTION_HIGH_ANALOG_VALUE (default 435).<BR><BR>To calibrate the probe, two reference solutions with known pH are required. Calibration procedure: <ol><li>Put probe in solution with lower pH value. pH value of the solution is ANALOG_PH_CALSOLUTION_LOW_PH.</li><li>Wait until analog value / RAW value stabilizes (~3 minutes)</li><li>The analog reading is ANALOG_PH_CALSOLUTION_LOW_ANALOG_VALUE</li><li>Clean probe and put in solution with higher pH value. pH value of the solution is ANALOG_PH_CALSOLUTION_HIGH_PH.</li><li>Wait until analog value / RAW value stabilizes (~3 minutes)</li><li>The analog reading is ANALOG_PH_CALSOLUTION_HIGH_ANALOG_VALUE</li></ol>Analog readings can be read by either changing the analog port configuration to "Analog Input" while calibrating, or by enabling debug logs in the console and having a look at the `RAW Value`reading instead.</li></ul><BR>&emsp; `10` = MQ-X sensors parameter adjustments:</li><ul>`<param1>` = ANALOG_MQ_TYPE (default 2) It used to specify sensor type. At the moment exists: 2, 3, 4, 5, 6, 7, 8, 9, 131, 135 (means MQ-02, MQ-03, MQ-04 ecc.).<BR>`<param2>` = ANALOG_MQ_A (default 574.25 a params for MQ-02) It is exponential regression a params<BR>`<param3>` = ANALOG_MQ_B (default -2.222 b params for MQ-02) It is exponential regression b params, generally negative<BR>`<param4>` = ANALOG_MQ_RatioMQCleanAir (default 15.0 RatioMQCleanAir params for MQ-02) NOT USED YET. It is threshold for good air in ppm for future alams arming<BR>Usage example for MQ-02, MQ-04, MQ-07 and MQ-131<BR> `AdcParam 10, 2.00, 574.25, -2.22, 9.83`<BR> `AdcParam 10, 4.00, 1012.70, -2.79, 4.40 `<BR> `AdcParam 10, 7.00, 99.04, -1.52, 27.50 `<BR> `AdcParam 10, 131.00, 23.94, -1.11, 15.00 `</li></ul><BR>