/*************************************************************************** * Example sketch for the ADS1115_WE library * * This sketch shows how to use the ADS1115 module with the TinyWireM library: * https://github.com/adafruit/TinyWireM * This allows you to run the ADS1115_WE library on an ATtiny85, for example. * * For this specific sketch you also need library Tiny4KOLED to display the * measured values on a SSD1306 OLED display: * https://github.com/datacute/Tiny4kOLED * * Further information can be found on: * https://wolles-elektronikkiste.de/ads1115 (German) * https://wolles-elektronikkiste.de/en/ads1115-a-d-converter-with-amplifier (English) * ***************************************************************************/ /* !!!! IN ORDER TO USE TinyWireM YOU NEED TO UNCOMMENT #define USE_TINY_WIRE_M_ !!!! * !!!! IN ADS1115_config.h WHICH YOU FIND IN THE libraries/ADS1115_WE/src FOLDER !!!! !!!! */ #include #include #include #define ADS1115_I2C_ADDR 0x48 uint8_t width = 128; uint8_t height = 64; /* There are two ways to create your ADS1115_WE object: * ADS1115_WE adc = ADS1115_WE() -> uses Wire / I2C Address = 0x48 * ADS1115_WE adc = ADS1115_WE(I2C_ADDRESS) -> uses Wire / I2C_ADDRESS */ ADS1115_WE adc = ADS1115_WE(ADS1115_I2C_ADDR); void setup() { TinyWireM.begin(); oled.begin(width, height, sizeof(tiny4koled_init_128x64br), tiny4koled_init_128x64br); oled.clear(); oled.setFont(FONT6X8); oled.on(); if(!adc.init()){ oled.print("ADS1115 not connected"); while(1){} } else{ oled.print("ADS1115 connected"); delay(1000); oled.clear(); } /* 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 } /* 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; adc.setCompareChannels(ADS1115_COMP_0_GND); voltage = adc.getResult_V(); oled.setCursor(0,0); oled.print("Channel 0 [V]: "); oled.print(voltage); oled.clearToEOL(); adc.setCompareChannels(ADS1115_COMP_1_GND); voltage = adc.getResult_V(); oled.setCursor(0,2); oled.print("Channel 1 [V]: "); oled.print(voltage); oled.clearToEOL(); adc.setCompareChannels(ADS1115_COMP_2_GND); voltage = adc.getResult_V(); oled.setCursor(0,4); oled.print("Channel 2 [V]: "); oled.print(voltage); oled.clearToEOL(); adc.setCompareChannels(ADS1115_COMP_3_GND); voltage = adc.getResult_V(); oled.setCursor(0,6); oled.print("Channel 3 [V]: "); oled.print(voltage); oled.clearToEOL(); delay(2000); }