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| -rw-r--r-- | examples/Auto_Range.ino | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/examples/Auto_Range.ino b/examples/Auto_Range.ino new file mode 100644 index 0000000..31d494e --- /dev/null +++ b/examples/Auto_Range.ino @@ -0,0 +1,195 @@ +/***************************************************************************
+* Example sketch for the ADS1115_WE library
+*
+* This sketch shows how to use the Auto Range function of the AD1115_WE library.
+*
+* Further information can be found on:
+* https://wolles-elektronikkiste.de/ads1115 (German)
+* https://wolles-elektronikkiste.de/en/ads1115-a-d-converter-with-amplifier (English)
+*
+***************************************************************************/
+
+#include<ADS1115_WE.h>
+#include<Wire.h>
+#define I2C_ADDRESS 0x48
+
+ADS1115_WE adc(I2C_ADDRESS);
+// ADS1115_WE adc = ADS1115_WE(); // Alternative: uses default address 0x48
+
+void setup() {
+ Wire.begin();
+ Serial.begin(9600);
+ if(!adc.init()){
+ Serial.println("ADS1115 not connected!");
+ }
+
+ /* Set the voltage range of the ADC to adjust the gain
+ * Please note that you must not apply more than VDD + 0.3V to the input pins!
+ *
+ * ADS1115_RANGE_6144 -> +/- 6144 mV
+ * ADS1115_RANGE_4096 -> +/- 4096 mV
+ * ADS1115_RANGE_2048 -> +/- 2048 mV (default)
+ * ADS1115_RANGE_1024 -> +/- 1024 mV
+ * ADS1115_RANGE_0512 -> +/- 512 mV
+ * ADS1115_RANGE_0256 -> +/- 256 mV
+ */
+ adc.setVoltageRange_mV(ADS1115_RANGE_6144); //comment line/change parameter to change range
+
+ /* Set the inputs to be compared
+ *
+ * ADS1115_COMP_0_1 -> compares 0 with 1 (default)
+ * ADS1115_COMP_0_3 -> compares 0 with 3
+ * ADS1115_COMP_1_3 -> compares 1 with 3
+ * ADS1115_COMP_2_3 -> compares 2 with 3
+ * ADS1115_COMP_0_GND -> compares 0 with GND
+ * ADS1115_COMP_1_GND -> compares 1 with GND
+ * ADS1115_COMP_2_GND -> compares 2 with GND
+ * ADS1115_COMP_3_GND -> compares 3 with GND
+ */
+ adc.setCompareChannels(ADS1115_COMP_0_GND); //comment line/change parameter to change channel
+
+ /* Set number of conversions after which the alert pin asserts
+ * - or you can disable the alert
+ *
+ * ADS1115_ASSERT_AFTER_1 -> after 1 conversion
+ * ADS1115_ASSERT_AFTER_2 -> after 2 conversions
+ * ADS1115_ASSERT_AFTER_4 -> after 4 conversions
+ * ADS1115_DISABLE_ALERT -> disable comparator / alert pin (default)
+ */
+ //adc.setAlertPinMode(ADS1115_ASSERT_AFTER_1); //uncomment if you want to change the default
+
+ /* Set the conversion rate in SPS (samples per second)
+ * Options should be self-explaining:
+ *
+ * ADS1115_8_SPS
+ * ADS1115_16_SPS
+ * ADS1115_32_SPS
+ * ADS1115_64_SPS
+ * ADS1115_128_SPS (default)
+ * ADS1115_250_SPS
+ * ADS1115_475_SPS
+ * ADS1115_860_SPS
+ */
+ adc.setConvRate(ADS1115_64_SPS); //uncomment if you want to change the default
+
+ /* Set continuous or single shot mode:
+ *
+ * ADS1115_CONTINUOUS -> continuous mode
+ * ADS1115_SINGLE -> single shot mode (default)
+ */
+ adc.setMeasureMode(ADS1115_CONTINUOUS); //comment line/change parameter to change mode
+
+ /* Choose maximum limit or maximum and minimum alert limit (window) in Volt - alert pin will
+ * assert when measured values are beyond the maximum limit or outside the window
+ * Upper limit first: setAlertLimit_V(MODE, maximum, minimum)
+ * In max limit mode the minimum value is the limit where the alert pin assertion will be
+ * cleared (if not latched)
+ *
+ * ADS1115_MAX_LIMIT
+ * ADS1115_WINDOW
+ *
+ */
+ //adc.setAlertModeAndLimit_V(ADS1115_MAX_LIMIT, 3.0, 1.5); //uncomment if you want to change the default
+
+ /* Enable or disable latch. If latch is enabled the alert pin will assert until the
+ * conversion register is read (getResult functions). If disabled the alert pin assertion will be
+ * cleared with next value within limits.
+ *
+ * ADS1115_LATCH_DISABLED (default)
+ * ADS1115_LATCH_ENABLED
+ */
+ //adc.setAlertLatch(ADS1115_LATCH_ENABLED); //uncomment if you want to change the default
+
+ /* Sets the alert pin polarity if active:
+ *
+ * ADS1115_ACT_LOW -> active low (default)
+ * ADS1115_ACT_HIGH -> active high
+ */
+ //adc.setAlertPol(ADS1115_ACT_LOW); //uncomment if you want to change the default
+
+ /* With this function the alert pin will assert, when a conversion is ready.
+ * In order to deactivate, use the setAlertLimit_V function
+ */
+ //adc.setAlertPinToConversionReady(); //uncomment if you want to change the default
+
+ /* Enable or disable permanent automatic range selection mode. If enabled, the range will
+ * change if the measured values are outside of 30-80% of the maximum value of the current
+ * range.
+ * !!! Use EITHER this function once OR setAutoRange() whenever needed (see below) !!!
+ */
+ adc.setPermanentAutoRangeMode(true);
+
+ Serial.println("ADS1115 Example Sketch - Continuous Mode with Auto Range");
+ Serial.println();
+}
+
+void loop() {
+ float voltage = 0.0;
+
+ Serial.print("Channel 0 - ");
+ voltage = readChannel(ADS1115_COMP_0_GND);
+ Serial.println(voltage);
+
+ Serial.print("Channel 1 - ");
+ voltage = readChannel(ADS1115_COMP_1_GND);
+ Serial.println(voltage);
+
+ Serial.print("Channel 2 - ");
+ voltage = readChannel(ADS1115_COMP_2_GND);
+ Serial.println(voltage);
+
+ Serial.print("Channel 3 - ");
+ voltage = readChannel(ADS1115_COMP_3_GND);
+ Serial.println(voltage);
+
+ Serial.println("-------------------------------");
+ delay(1000);
+}
+
+float readChannel(ADS1115_MUX channel) {
+ float voltage = 0.0;
+ adc.setCompareChannels(channel);
+
+ /* setAutoRange() switches to the highest range (+/- 6144 mV), measures the current
+ * voltage and then switches to the lowest range where the current value is still
+ * below 80% of the maximum value of the range. The function is only suitable if you
+ * expect stable or slowly changing voltages. setAutoRange needs roughly the time you
+ * would need for three conversions.
+ * If the ADS115 is in single shot mode, setAutoRange() will switch into continuous
+ * mode to measure a value and switch back again.
+ * !!! Use EITHER this function whenever needed OR setPermanentAutoRangeMode(true) once !!!
+ */
+ //adc.setAutoRange();
+ adc.getResult_mV();
+ printVoltageRange(); // this is just to show that the range is changing with changing voltages
+ voltage = adc.getResult_V(); // alternative: getResult_mV for Millivolt
+ return voltage;
+}
+
+void printVoltageRange(){
+ unsigned int voltageRange = adc.getVoltageRange_mV();
+ Serial.print("Range: ");
+
+ switch(voltageRange){
+ case 6144:
+ Serial.print("+/- 6144 mV, Voltage [mV]: ");
+ break;
+ case 4096:
+ Serial.print("+/- 4096 mV, Voltage [mV]: ");
+ break;
+ case 2048:
+ Serial.print("+/- 2048 mV, Voltage [mV]: ");
+ break;
+ case 1024:
+ Serial.print("+/- 1024 mV, Voltage [mV]: ");
+ break;
+ case 512:
+ Serial.print("+/- 512 mV, Voltage [mV]: ");
+ break;
+ case 256:
+ Serial.print("+/- 256 mV, Voltage [mV]: ");
+ break;
+ default:
+ Serial.println("Something went wrong");
+ }
+}
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