summaryrefslogtreecommitdiffstats
path: root/examples/Continuous/Continuous.ino
blob: ce41808acc77cf2f49091e2d31f61c6b37695c67 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/***************************************************************************
* Example sketch for the ADS1115_WE library
*
* This sketch shows how to use the ADS1115 in continuous mode. 
*  
* 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_8_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

  Serial.println("ADS1115 Example Sketch - Continuous Mode");
  Serial.println("All values in volts");
  Serial.println();
}

  /* If you change the compare channels you can immediately read values from the conversion 
   * register, although they might belong to the former channel if no precautions are taken. 
   * It takes about the time needed for two conversions to get the correct data. In single 
   * shot mode you can use the isBusy() function to wait for data from the new channel. This 
   * does not work in continuous mode. 
   * To solve this issue the library adds a delay after change of channels if you are in contunuous
   * mode. The length of the delay is adjusted to the conversion rate. But be aware that the output 
   * rate will be much lower that the conversion rate if you change channels frequently. 
   */

void loop() {
  float voltage = 0.0;

  Serial.print("0: ");
  voltage = readChannel(ADS1115_COMP_0_GND);
  Serial.print(voltage);

  Serial.print(",   1: ");
  voltage = readChannel(ADS1115_COMP_1_GND);
  Serial.print(voltage);
  
  Serial.print(",   2: ");
  voltage = readChannel(ADS1115_COMP_2_GND);
  Serial.print(voltage);

  Serial.print(",   3: ");
  voltage = readChannel(ADS1115_COMP_3_GND);
  Serial.println(voltage);

  delay(1000);
}

float readChannel(ADS1115_MUX channel) {
  float voltage = 0.0;
  adc.setCompareChannels(channel);
  voltage = adc.getResult_V(); // alternative: getResult_mV for Millivolt
  return voltage;
}