getting 65536.00 value from event.light

TinajaLabs commented 5 years ago

I'm building a room sensor with DHT22, a TSL2561, and an Adafruit PIR sensor (not yet hooked up). These are being plugged into a wemos d1 mini with wifiManager and MQTT libs included.

When I run the simple sensorapi application, unadjusted, I get a reasonable value for the lux reading.

When I run it with my fairly complicated code, I get 65536.

lux: 65536.00 broadband: 65535
infrared: 65535

I added the getLuminosity() call to see what they were showing. Here's the code that does the reading.

  /* Get a new sensor event */
  sensors_event_t event;
  tsl.getEvent(&event);

  tsl.getLuminosity(&broadband, &infrared);

  /* Display the results (light is measured in lux) */
  if (event.light)
  {
    Serial.print(event.light);
    Serial.print(" lux\t");

    Serial.print("broadband:\t");
    Serial.print(broadband);

    Serial.print("\tinfrared:\t");
    Serial.println(infrared);

  }
  else
  {
    /* If event.light = 0 lux the sensor is probably saturated
       and no reliable data could be generated! */
    Serial.println("Sensor overload");
  }
  delay(250);

At the top of the sketch, I'm loading the following libs:

#include <FS.h> //this needs to be first, or it all crashes and burns...

#include <Wire.h>
#include <Adafruit_Sensor.h>  // Adafruit Unified Sensor Driver - https://github.com/adafruit/Adafruit_Sensor

#include <ESP8266WiFi.h>      // https://github.com/esp8266/Arduino
#include <WiFiManager.h>      // https://github.com/tzapu/WiFiManager
#include <ESP8266WebServer.h> //Local WebServer used to serve the configuration portal
#include <ArduinoJson.h>      //https://github.com/bblanchon/ArduinoJson

#include <PubSubClient.h>
#ifdef ESP32
#include <SPIFFS.h>
#endif

#include <Adafruit_TSL2561_U.h>
#include <DHT.h>

The compile results:

Sketch uses 385052 bytes (36%) of program storage space. Maximum is 1044464 bytes.
Global variables use 33352 bytes (40%) of dynamic memory, leaving 48568 bytes for local variables.
Maximum is 81920 bytes.

It seems to compile just fine. Perhaps there are some conflicts within these libs?

Thanks for any advice, Chris.

ladyada commented 5 years ago

probably a wiring issue. if the TSL2561 breakout is made and sold by adafruit you can post in the adafruit support forums. Otherwise, please post in the vendor support forums

TinajaLabs commented 5 years ago

Yes it is the Adafruit TSL2561 Luminosity/Lux/Light Sensor adafru.it/439

I'll repeat the question on the adafruit forum.

For others who follow, the reason I'm confused is that using the basic example sketch, sensorapi, it works. It's only when I use it with other components and libraries that it fails. So I feel sure it's not a wiring problem.

Thanks.

Update: My post on the forums - https://forums.adafruit.com/viewtopic.php?f=19&t=151323

adafruit / Adafruit_TSL2561

getting 65536.00 value from event.light #22