mirror of https://github.com/arendst/Tasmota.git
111 lines
4.0 KiB
Arduino
111 lines
4.0 KiB
Arduino
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// I2C device class (I2Cdev) demonstration Arduino sketch for ADS1115 class
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// Example of reading two differential inputs of the ADS1115 and showing the value in mV
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// 2016-03-22 by Eadf (https://github.com/eadf)
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// Updates should (hopefully) always be available at https://github.com/jrowberg/i2cdevlib
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//
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// Changelog:
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// 2016-03-22 - initial release
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/* ============================================
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I2Cdev device library code is placed under the MIT license
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Copyright (c) 2011 Jeff Rowberg
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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===============================================
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*/
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#include "ADS1115.h"
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ADS1115 adc0(ADS1115_DEFAULT_ADDRESS);
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// Wire ADS1115 ALERT/RDY pin to Arduino pin 2
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const int alertReadyPin = 2;
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void setup() {
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//I2Cdev::begin(); // join I2C bus
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Wire.begin();
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Serial.begin(115200); // initialize serial communication
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Serial.println("Testing device connections...");
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Serial.println(adc0.testConnection() ? "ADS1115 connection successful" : "ADS1115 connection failed");
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adc0.initialize(); // initialize ADS1115 16 bit A/D chip
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// We're going to do single shot sampling
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adc0.setMode(ADS1115_MODE_SINGLESHOT);
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// Slow things down so that we can see that the "poll for conversion" code works
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adc0.setRate(ADS1115_RATE_8);
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// Set the gain (PGA) +/- 6.144V
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// Note that any analog input must be higher than –0.3V and less than VDD +0.3
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adc0.setGain(ADS1115_PGA_6P144);
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// ALERT/RDY pin will indicate when conversion is ready
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pinMode(alertReadyPin,INPUT_PULLUP);
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adc0.setConversionReadyPinMode();
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// To get output from this method, you'll need to turn on the
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//#define ADS1115_SERIAL_DEBUG // in the ADS1115.h file
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#ifdef ADS1115_SERIAL_DEBUG
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adc0.showConfigRegister();
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Serial.print("HighThreshold="); Serial.println(adc0.getHighThreshold(),BIN);
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Serial.print("LowThreshold="); Serial.println(adc0.getLowThreshold(),BIN);
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#endif
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}
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/** Poll the assigned pin for conversion status
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*/
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void pollAlertReadyPin() {
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for (uint32_t i = 0; i<100000; i++)
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if (!digitalRead(alertReadyPin)) return;
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Serial.println("Failed to wait for AlertReadyPin, it's stuck high!");
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}
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void loop() {
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// The below method sets the mux and gets a reading.
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adc0.setMultiplexer(ADS1115_MUX_P0_NG);
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adc0.triggerConversion();
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pollAlertReadyPin();
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Serial.print("A0: "); Serial.print(adc0.getMilliVolts(false)); Serial.print("mV\t");
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adc0.setMultiplexer(ADS1115_MUX_P1_NG);
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adc0.triggerConversion();
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pollAlertReadyPin();
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Serial.print("A1: "); Serial.print(adc0.getMilliVolts(false)); Serial.print("mV\t");
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adc0.setMultiplexer(ADS1115_MUX_P2_NG);
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adc0.triggerConversion();
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pollAlertReadyPin();
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Serial.print("A2: "); Serial.print(adc0.getMilliVolts(false)); Serial.print("mV\t");
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adc0.setMultiplexer(ADS1115_MUX_P3_NG);
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// Do conversion polling via I2C on this last reading:
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Serial.print("A3: "); Serial.print(adc0.getMilliVolts(true)); Serial.print("mV");
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Serial.println(digitalRead(alertReadyPin));
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delay(500);
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}
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