Home › Forums › Environmental Sensors › Atlas Scientific Dissolved Oxygen Sensor Not Reading
Tagged: -9999.00, Atlas Scientific, Dissolved Oxygen, DO
- This topic has 7 replies, 5 voices, and was last updated 2024-04-03 at 4:25 PM by Michael Daniel.
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2023-02-24 at 4:06 PM #17625
I am working on programming a Mayfly Data Logger v1.1. I am using the Simple_Logging program in Visual Studio and the PlatformIO. I am attempting to connect an Atlas Scientific DO sensor to the logger using I2C. I already have an Atlas Scientific pH sensor connected to the Mayfly, and the pH sensor is working fine. The DO sensor is not. It will record the data correctly the first time through the cycle, but will return -9999.00 upon subsequent cycles. If I disconnect the power to the DO EZO between readings, it will run properly and give me the correct reading, but just the once. I am sure it is in the code somewhere, but I am not at all familiar with the PlatformIO programming, so I don’t even know where to start.
Has anyone come across this before? I have both the pH and the DO sensors each connected to an isolator carrier board. The lights on the DO EZO flash at each reading, suggesting the Mayfly is communicating with the DO sensor.
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2023-02-24 at 4:12 PM #17628
Not sure how to post the code, nor do I know which code to post.
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2023-02-24 at 6:51 PM #17630
How are you connecting the sensor to the Mayfly (what pins for data and power and what jack), and are you putting the Mayfly to sleep between readings? Is the sensor being powered constantly or are you switching off the power to the sensor between readings?
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2023-02-25 at 11:13 AM #17631
I have tried various configurations. I have connected it to the I2C Grove slot, and I have connected it to the SDA & SCL pins. As for the power, I have gotten power through the Grove connector, and I have tried giving it power through each of the 3.3v and gnd pins. It performs the same regardless of how I have it connected.
I am using the Simple_logging.ino program as written, so I don’t know if it is going to sleep between readings, but the indicator light on the pH EZO is shutting off between readings, while the DO EZO mostly stays on. I don’t know if that helps. Where would I find the code that controls power?
This is the first time I have used PlatformIO to program an arduino, so I am still trying to figure everything out. I have only ever used the Arduino IDE before.
I really appreciate the help!
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2023-02-27 at 11:10 AM #17634
Most I2C devices don’t like having the power to the device cut and the reapplied, which is why the Vcc pin of the Mayfly’s I2C Grove jack is constantly powered. All the other Grove jacks switch the power on or off, but the I2C jack always has 3.3v, even with the Mayfly is asleep. So if you’re powering your Atlas board from any of the switched sources, try putting it on the constant 3.3v pin. If you’ve already tried that, then it’s probably something in the code that’s causing the issue. I don’t use any of the Atlas products, but a few members here have successfully used them, so perhaps they could share what code and hardware configuration was used? @w3asa @adamgold @fionasouthwell
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2023-02-28 at 11:18 AM #17642
It’s been a long time since I played with the Atlas sensors, but from my notes, power cycling them can cause the whole logger to crash. If you want to power down Atlas sensors between readings, you need an I2C isolator. See the warning here: https://envirodiy.github.io/ModularSensors/group__atlas__group.html. The simple logging program should put the sensors to sleep and power them down between readings: https://github.com/EnviroDIY/ModularSensors/blob/master/examples/simple_logging/ReadMe.md
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2024-03-21 at 1:36 PM #18390
James,
Did you ever resolve this? I’m having the same issue.
Thanks!
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2024-04-03 at 4:25 PM #18411
I have both a pH and a DO sensor working on one of my data loggers., and I’ve had up to four Atlas Scientific sensors working at once using a sensor bridge: https://atlas-scientific.com/carrier-boards/sensor-bridge/Â I currently have the sensors connected through the qwiic ports, and they seem to be working fine. Here’s my code, there’s a lot of extraneous stuff that I haven’t had a chance to clean up yet, and it’s sending data to thingspeak instead of MonitorMyWatershed:
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Please use standard time!// Set the input and output pins for the logger// NOTE: Use -1 for pins that do not applyconst long serialBaud = 115200; // Baud rate for debuggingconst int8_t greenLED = 8; // Pin for the green LEDconst int8_t redLED = 9; // Pin for the red LEDconst int8_t buttonPin = 21; // Pin for debugging mode (ie, button pin)const int8_t wakePin = 31; // MCU interrupt/alarm pin to wake from sleep// Mayfly 0.x D31 = A7// Set the wake pin to -1 if you do not want the main processor to sleep.// In a SAMD system where you are using the built-in rtc, set wakePin to 1const int8_t sdCardPwrPin = -1; // MCU SD card power pinconst int8_t sdCardSSPin = 12; // SD card chip select/slave select pinconst int8_t sensorPowerPin = 22; // MCU pin controlling main sensor power/** End [logging_options] */// ==========================================================================// Wifi/Cellular Modem Options// ==========================================================================/** Start [sim7080] */// For almost anything based on the SIMCom SIM7080G#include <modems/SIMComSIM7080.h>// Create a reference to the serial port for the modemHardwareSerial& modemSerial = Serial1; // Use hardware serial if possible// for Additional Serial Ports" sectionconst int32_t modemBaud =9600; // SIM7080 does auto-bauding by default, but I set mine to 9600// Modem Pins - Describe the physical pin connection of your modem to your board// NOTE: Use -1 for pins that do not applyconst int8_t modemVccPin = 18; // MCU pin controlling modem powerconst int8_t modemStatusPin = 19; // MCU pin used to read modem status//const bool useCTSforStatus = false; // Flag to use the modem CTS pin for status//const int8_t modemResetPin = 20; // MCU pin connected to modem reset pinconst int8_t modemSleepRqPin = 23; // MCU pin for modem sleep/wake requestconst int8_t modemLEDPin = redLED; // MCU pin connected an LED to show modem// status (-1 if unconnected)// Network connection informationconst char* apn = "hologram"; // The APN for the gprs connection// Create the modem objectSIMComSIM7080 modem7080(&modemSerial, modemVccPin, modemStatusPin,modemSleepRqPin, apn);// Create an extra reference to the modem by a generic nameSIMComSIM7080 modem = modem7080;/** End [xbee_cell_transparent] */// ==========================================================================// Using the Processor as a Sensor// ==========================================================================/** Start [processor_sensor] */#include <sensors/ProcessorStats.h>// Create the main processor chip "sensor" - for general metadataconst char* mcuBoardVersion = "v1.1b";ProcessorStats mcuBoard(mcuBoardVersion);/** End [processor_sensor] */// ==========================================================================// Maxim DS3231 RTC (Real Time Clock)// ==========================================================================/** Start [ds3231] */#include <sensors/MaximDS3231.h>// Create a DS3231 sensor objectMaximDS3231 ds3231(1);/** End [ds3231] */// ==========================================================================// Campbell OBS 3 / OBS 3+ Analog Turbidity Sensor// ==========================================================================/** Start [vue10] */#include <sensors/CampbellClariVUE10.h>const char* ClariVUESDI12address = "2"; // The SDI-12 Address of the ClariVUE10const int8_t ClariVUEPower = sensorPowerPin; // Power pin (-1 if unconnected)const int8_t ClariVUEData = 7; // The SDI12 data pin// NOTE: you should NOT take more than one readings. THe sensor already takes// and averages 8 by default.// Create a Campbell ClariVUE10 sensor objectCampbellClariVUE10 clarivue(*ClariVUESDI12address, ClariVUEPower, ClariVUEData);/** End [vue10] */// ==========================================================================// Meter Hydros 21 Conductivity, Temperature, and Depth Sensor// ==========================================================================/** Start [hydros21] */#include <sensors/MeterHydros21.h>// NOTE: Use -1 for any pins that don't apply or aren't being used.const char* hydros21SDI12address = "1"; // The SDI-12 Address of the Hydros21const uint8_t hydros21NumberReadings = 6; // The number of readings to averageconst int8_t hydros21Power = sensorPowerPin; // Power pinconst int8_t hydros21Data = 7; // The SDI12 data pin// Create a Decagon Hydros21 sensor objectMeterHydros21 hydros21(*hydros21SDI12address, hydros21Power, hydros21Data,hydros21NumberReadings);/** End [hydros21] */// ==========================================================================// Decagon CTD-10 Conductivity, Temperature, and Depth Sensor// ==========================================================================/** Start [decagon_ctd] */#include <sensors/DecagonCTD.h>// NOTE: Use -1 for any pins that don't apply or aren't being used.const char* CTDSDI12address = "1"; // The SDI-12 Address of the CTDconst uint8_t CTDNumberReadings = 6; // The number of readings to averageconst int8_t SDI12Power = sensorPowerPin; // Power pin (-1 if unconnected)const int8_t SDI12Data = 7; // The SDI12 data pin// Create a Decagon CTD sensor objectDecagonCTD ctd(*CTDSDI12address, SDI12Power, SDI12Data, CTDNumberReadings);/** End [decagon_ctd] */#include <sensors/AtlasScientificDO.h>// NOTE: Use -1 for any pins that don't apply or aren't being used.const int8_t AtlasDOPower = sensorPowerPin; // Power pinuint8_t AtlasDOi2c_addr = 0x61; // Default for DO is 0x61 (97)// All Atlas sensors have different default I2C addresses, but any of them can// be re-addressed to any 8 bit number. If using the default address for any// Atlas Scientific sensor, you may omit this argument.// Create an Atlas Scientific DO sensor object// AtlasScientificDO atlasDO(AtlasDOPower, AtlasDOi2c_addr);AtlasScientificDO atlasDO(AtlasDOPower);#include <sensors/AtlasScientificEC.h>// NOTE: Use -1 for any pins that don't apply or aren't being used.const int8_t AtlasECPower = sensorPowerPin; // Power pinuint8_t AtlasECi2c_addr = 0x64; // Default for pH is 0x63 (99)// All Atlas sensors have different default I2C addresses, but any of them can// be re-addressed to any 8 bit number. If using the default address for any// Atlas Scientific sensor, you may omit this argument.// Create an Atlas Scientific pH sensor object// AtlasScientificpH atlaspH(AtlaspHPower, AtlaspHi2c_addr);AtlasScientificEC atlasEC(AtlasECPower, AtlasECi2c_addr);#include <sensors/AtlasScientificpH.h>// NOTE: Use -1 for any pins that don't apply or aren't being used.const int8_t AtlaspHPower = sensorPowerPin; // Power pinuint8_t AtlaspHi2c_addr = 0x63; // Default for pH is 0x63 (99)// All Atlas sensors have different default I2C addresses, but any of them can// be re-addressed to any 8 bit number. If using the default address for any// Atlas Scientific sensor, you may omit this argument.// Create an Atlas Scientific pH sensor object// AtlasScientificpH atlaspH(AtlaspHPower, AtlaspHi2c_addr);AtlasScientificpH atlaspH(AtlaspHPower);#include <sensors/AtlasScientificORP.h>// NOTE: Use -1 for any pins that don't apply or aren't being used.const int8_t AtlasORPPower = sensorPowerPin; // Power pinuint8_t AtlasORPi2c_addr = 0x62; // Default for ORP is 0x62 (98)// All Atlas sensors have different default I2C addresses, but any of them can// be re-addressed to any 8 bit number. If using the default address for any// Atlas Scientific sensor, you may omit this argument.// Create an Atlas Scientific ORP sensor object// AtlasScientificORP atlasORP(AtlasORPPower, AtlasORPi2c_addr);AtlasScientificORP atlasORP(AtlasORPPower);// ==========================================================================// Creating the Variable Array[s] and Filling with Variable Objects// ==========================================================================/** Start [variable_arrays] */Variable* variableList[] = {new MeterHydros21_Temp(&hydros21),new MeterHydros21_Depth(&hydros21),new MeterHydros21_Cond(&hydros21),// new DecagonCTD_Cond(&ctd),// new DecagonCTD_Depth(&ctd),// new DecagonCTD_Temp(&ctd),// new CampbellOBS3_Turbidity(&osb3low, "", "TurbLow"),// new CampbellOBS3_Turbidity(&osb3high, "", "TurbHigh"),new ProcessorStats_Battery(&mcuBoard),// new Modem_SignalPercent(&modem),new MaximDS3231_Temp(&ds3231),new CampbellClariVUE10_Turbidity(&clarivue),new AtlasScientificDO_DOmgL(&atlasDO),//new AtlasScientificDO_DOpct(&atlasDO),// new AtlasScientificEC_Cond(&atlasEC),// new AtlasScientificEC_Salinity(&atlasEC),//new AtlasScientificEC_SpecificGravity(&atlasEC),//new AtlasScientificEC_TDS(&atlasEC),new AtlasScientificpH_pH(&atlaspH),//new AtlasScientificORP_Potential(&atlasORP)};// All UUID's, device registration, and sampling feature information can be// pasted directly from Monitor My Watershed. To get the list, click the "View// token UUID list" button on the upper right of the site page.// *** CAUTION --- CAUTION --- CAUTION --- CAUTION --- CAUTION ***// Check the order of your variables in the variable list!!!// Be VERY certain that they match the order of your UUID's!// Rearrange the variables in the variable list if necessary to match!// *** CAUTION --- CAUTION --- CAUTION --- CAUTION --- CAUTION ***const char *UUIDs[] = // UUID array for device sensors{"abcdefgh-1234-1234-1234-abcdefghijkl", // Electrical conductivity (Decagon_CTD-10_Cond)"abcdefgh-1234-1234-1234-abcdefghijkl", // Water depth (Decagon_CTD-10_Depth)"abcdefgh-1234-1234-1234-abcdefghijkl", // Temperature (Decagon_CTD-10_Temp)"abcdefgh-1234-1234-1234-abcdefghijkl", // Battery voltage (EnviroDIY_Mayfly_Batt)"abcdefgh-1234-1234-1234-abcdefghijkl", // Percent full scale (Digi_Cellular_SignalPercent)"abcdefgh-1234-1234-1234-abcdefghijkl", // Temperature (Maxim_DS3231_Temp)"abcdefgh-1234-1234-1234-abcdefghijkl" // Turbidity (Campbell_ClariVUE_Turbidity)};const char *registrationToken = "abcdefgh-1234-1234-1234-abcdefghijkl"; // Device registration tokenconst char *samplingFeature = "abcdefgh-1234-1234-1234-abcdefghijkl"; // Sampling feature UUID// Count up the number of pointers in the arrayint variableCount = sizeof(variableList) / sizeof(variableList[0]);// Create the VariableArray objectVariableArray varArray(variableCount, variableList, UUIDs);/** End [variable_arrays] */// ==========================================================================// The Logger Object[s]// ==========================================================================/** Start [loggers] */// Create a new logger instanceLogger dataLogger(LoggerID, loggingInterval, &varArray);/** End [loggers] */// ==========================================================================// Creating Data Publisher[s]// ==========================================================================/** Start [publishers] */// Create a data publisher for the Monitor My Watershed/EnviroDIY POST endpoint//#include <publishers/EnviroDIYPublisher.h>//EnviroDIYPublisher EnviroDIYPOST(dataLogger, &modem.gsmClient,// registrationToken, samplingFeature);// Create a channel with fields on ThingSpeak in advance// The fields will be sent in exactly the order they are in the variable array.// Any custom name or identifier given to the field on ThingSpeak is irrelevant.// No more than 8 fields of data can go to any one channel. Any fields beyond// the eighth in the array will be ignored.const char* thingSpeakChannelID ="123456"; // The numeric channel id for your channelconst char* thingSpeakMQTTusername ="abcdefgh-1234-1234-1234-abcdefghijkl"; //Your MQTT usernameconst char* thingSpeakMQTTpassword ="abcdefgh-1234-1234-1234-abcdefghijkl"; //Your MQTT passwordconst char* thingSpeakMQTTclientID ="abcdefgh-1234-1234-1234-abcdefghijkl"; //Your MQTT client ID// Create a data publisher for ThingSpeak#include <publishers/ThingSpeakPublisher.h>ThingSpeakPublisher TsMqtt;/** End [publishers] */// ==========================================================================// Working Functions// ==========================================================================/** Start [working_functions] */// Flashes the LED's on the primary boardvoid greenredflash(uint8_t numFlash = 4, uint8_t rate = 75) {for (uint8_t i = 0; i < numFlash; i++) {digitalWrite(greenLED, HIGH);digitalWrite(redLED, LOW);delay(rate);digitalWrite(greenLED, LOW);digitalWrite(redLED, HIGH);delay(rate);}digitalWrite(redLED, LOW);}// Reads the battery voltage// NOTE: This will actually return the battery level from the previous update!float getBatteryVoltage() {if (mcuBoard.sensorValues[0] == -9999) mcuBoard.update();return mcuBoard.sensorValues[0];}// ==========================================================================// Arduino Setup Function// ==========================================================================/** Start [setup] */void setup() {// Start the primary serial connectionSerial.begin(serialBaud);// Print a start-up note to the first serial portSerial.print(F("Now running "));Serial.print(sketchName);Serial.print(F(" on Logger "));Serial.println(LoggerID);Serial.println();Serial.print(F("Using ModularSensors Library version "));Serial.println(MODULAR_SENSORS_VERSION);Serial.print(F("TinyGSM Library version "));Serial.println(TINYGSM_VERSION);Serial.println();// Start the serial connection with the modemmodemSerial.begin(modemBaud);// Set up pins for the LED'spinMode(22, OUTPUT);digitalWrite(22, HIGH);pinMode(greenLED, OUTPUT);digitalWrite(greenLED, LOW);pinMode(redLED, OUTPUT);digitalWrite(redLED, LOW);// Blink the LEDs to show the board is on and starting upgreenredflash();// Set the timezones for the logger/data and the RTC// Logging in the given time zoneLogger::setLoggerTimeZone(timeZone);// It is STRONGLY RECOMMENDED that you set the RTC to be in UTC (UTC+0)Logger::setRTCTimeZone(0);// Attach the modem and information pins to the loggerdataLogger.attachModem(modem);modem.setModemLED(modemLEDPin);dataLogger.setLoggerPins(wakePin, sdCardSSPin, sdCardPwrPin, buttonPin,greenLED);// Begin the variable array[s], logger[s], and publisher[s]varArray.begin(variableCount, variableList);dataLogger.begin(LoggerID, loggingInterval, &varArray);TsMqtt.begin(dataLogger, &modem.gsmClient,thingSpeakChannelID,thingSpeakMQTTusername,thingSpeakMQTTpassword,thingSpeakMQTTclientID);// Note: Please change these battery voltages to match your battery// Set up the sensors, except at lowest battery levelif (getBatteryVoltage() > 3.4) {Serial.println(F("Setting up sensors..."));varArray.setupSensors();}/** Start [setup_sim7080] */modem.setModemWakeLevel(HIGH); // ModuleFun Bee inverts the signalmodem.setModemResetLevel(HIGH); // ModuleFun Bee inverts the signalSerial.println(F("Waking modem and setting Cellular Carrier Options..."));modem.modemWake(); // NOTE: This will also set up the modemmodem.gsmModem.setBaud(modemBaud); // Make sure we're *NOT* auto-bauding!modem.gsmModem.setNetworkMode(38); // set to LTE only// 2 Automatic// 13 GSM only// 38 LTE only// 51 GSM and LTE onlymodem.gsmModem.setPreferredMode(1); // set to CAT-M// 1 CAT-M// 2 NB-IoT// 3 CAT-M and NB-IoT/** End [setup_sim7080] */// Sync the clock if it isn't valid or we have battery to spareif (getBatteryVoltage() > 3.55 || !dataLogger.isRTCSane()) {// Synchronize the RTC with NIST// This will also set up the modemdataLogger.syncRTC();}// Create the log file, adding the default header to it// Do this last so we have the best chance of getting the time correct and// all sensor names correct// Writing to the SD card can be power intensive, so if we're skipping// the sensor setup we'll skip this too.if (getBatteryVoltage() > 3.4) {Serial.println(F("Setting up file on SD card"));dataLogger.turnOnSDcard(true); // true = wait for card to settle after power updataLogger.createLogFile(true); // true = write a new headerdataLogger.turnOffSDcard(true); // true = wait for internal housekeeping after write}// Call the processor sleepSerial.println(F("Putting processor to sleep\n"));dataLogger.systemSleep();}/** End [setup] */// ==========================================================================// Arduino Loop Function// ==========================================================================/** Start [loop] */// Use this short loop for simple data logging and sendingvoid loop() {// Note: Please change these battery voltages to match your battery// At very low battery, just go back to sleepif (getBatteryVoltage() < 3.4) {dataLogger.systemSleep();}// At moderate voltage, log data but don't send it over the modemelse if (getBatteryVoltage() < 3.55) {dataLogger.logData();}// If the battery is good, send the data to the worldelse {dataLogger.logDataAndPublish();}}/** End [loop] *///Michael Daniel//Lynchburg Water Resources
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