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    Posts made by Dennis van der Wolf

    • RE: Office plant monitoring

      @Jan-Gatzke I have connected the fork to A0 and A1 of mine arduino nano. Now i have this result:

      10.02.2017 12:17:35	Multi Sensor (multi2)	SoilMoistPercentageSensor	-182 %
      10.02.2017 12:12:04	Multi Sensor (multi2)	SoilMoistPercentageSensor	-455 %
      10.02.2017 12:06:33	Multi Sensor (multi2)	SoilMoistPercentageSensor	-317 %
      10.02.2017 12:01:02	Multi Sensor (multi2)	SoilMoistPercentageSensor	255 %
      10.02.2017 11:55:31	Multi Sensor (multi2)	SoilMoistPercentageSensor	-547 %
      10.02.2017 11:49:26	Multi Sensor (multi2)	SoilMoistPercentageSensor	1169 %
      10.02.2017 11:43:55	Multi Sensor (multi2)	SoilMoistPercentageSensor	40 %
      10.02.2017 11:38:24	Multi Sensor (multi2)	SoilMoistPercentageSensor	-250 %
      

      This is the sketch i use:

      /*
       * The MySensors Arduino library handles the wireless radio link and protocol
       * between your home built sensors/actuators and HA controller of choice.
       * The sensors forms a self healing radio network with optional repeaters. Each
       * repeater and gateway builds a routing tables in EEPROM which keeps track of the
       * network topology allowing messages to be routed to nodes.
       *
       * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
       * Copyright (C) 2013-2015 Sensnology AB
       * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
       *
       * Documentation: http://www.mysensors.org
       * Support Forum: http://forum.mysensors.org
       *
       * This program is free software; you can redistribute it and/or
       * modify it under the terms of the GNU General Public License
       * version 2 as published by the Free Software Foundation.
       *
       *******************************
       *
       * DESCRIPTION
       *
       * Arduino soil moisture based on gypsum sensor/resistive sensor to avoid electric catalyse in soil
       *  Required to interface the sensor: 2 * 4.7kOhm + 2 * 1N4148
       *
       * Gypsum sensor and calibration:
       *    DIY: See http://vanderleevineyard.com/1/category/vinduino/1.html
       *    Built: Davis / Watermark 200SS
       *        http://www.cooking-hacks.com/watermark-soil-moisture-sensor?_bksrc=item2item&_bkloc=product
       *        http://www.irrometer.com/pdf/supportmaterial/sensors/voltage-WM-chart.pdf
       *        cb (centibar) http://www.irrometer.com/basics.html
       *            0-10 Saturated Soil. Occurs for a day or two after irrigation
       *            10-20 Soil is adequately wet (except coarse sands which are drying out at this range)
       *            30-60 Usual range to irrigate or water (except heavy clay soils).
       *            60-100 Usual range to irrigate heavy clay soils
       *            100-200 Soil is becoming dangerously dry for maximum production. Proceed with caution.
       *
       * Connection:
       *  D6, D7: alternative powering to avoid sensor degradation
       * A0, A1: alternative resistance mesuring
       *
       *  Based on:
       *  "Vinduino" portable soil moisture sensor code V3.00
       *   Date December 31, 2012
       *   Reinier van der Lee and Theodore Kaskalis
       *   www.vanderleevineyard.com
       * Contributor: epierre
       */
      
      // Copyright (C) 2015, Reinier van der Lee
      // www.vanderleevineyard.com
      
      // This program is free software: you can redistribute it and/or modify
      // it under the terms of the GNU General Public License as published by
      // the Free Software Foundation, either version 3 of the License, or
      // any later version.
      
      // This program is distributed in the hope that it will be useful,
      // but WITHOUT ANY WARRANTY; without even the implied warranty of
      // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      // GNU General Public License for more details.
      
      // Enable debug prints to serial monitor
      #define MY_DEBUG
      
      // Enable and select radio type attached
      #define MY_RADIO_NRF24
      //#define MY_RADIO_RFM69
      
      #include <math.h>       // Conversion equation from resistance to %
      #include <MySensors.h>
      
      // Setting up format for reading 3 soil sensors
      #define NUM_READS 10    // Number of sensor reads for filtering
      #define CHILD_ID 0
      
      MyMessage msg(CHILD_ID, V_LEVEL);
      unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)
      
      long buffer[NUM_READS];
      int index;
      
      /// @brief Structure to be used in percentage and resistance values matrix to be filtered (have to be in pairs)
      typedef struct {
          int moisture; //!< Moisture
          long resistance; //!< Resistance
      } values;
      
      const long knownResistor = 4700;  // Constant value of known resistor in Ohms
      
      int supplyVoltage;                // Measured supply voltage
      int sensorVoltage;                // Measured sensor voltage
      
      values valueOf[NUM_READS];        // Calculated moisture percentages and resistances to be sorted and filtered
      
      int i;                            // Simple index variable
      
      void setup()
      {
          // initialize the digital pins as an output.
          // Pin 6,7 is for sensor 1
          // initialize the digital pin as an output.
          // Pin 6 is sense resistor voltage supply 1
          pinMode(6, OUTPUT);
      
          // initialize the digital pin as an output.
          // Pin 7 is sense resistor voltage supply 2
          pinMode(7, OUTPUT);
      }
      
      void presentation()
      {
          sendSketchInfo("Soil Moisture Sensor Reverse Polarity", "1.0");
          present(CHILD_ID, S_MOISTURE);
      }
      
      void loop()
      {
      
          measure(6,7,1);
          Serial.print ("\t");
          Serial.println (average());
          long read1 = average();
      
          measure(7,6,0);
          Serial.print ("\t");
          Serial.println (average());
          long read2= average();
      
          long sensor1 = (read1 + read2)/2;
      
          Serial.print ("resistance bias =" );
          Serial.println (read1-read2);
          Serial.print ("sensor bias compensated value = ");
          Serial.println (sensor1);
          Serial.println ();
      
          //send back the values
          send(msg.set((long int)ceil(sensor1)));
          // delay until next measurement (msec)
          sleep(SLEEP_TIME);
      }
      
      void measure (int phase_b, int phase_a, int analog_input)
      {
          // read sensor, filter, and calculate resistance value
          // Noise filter: median filter
      
          for (i=0; i<NUM_READS; i++) {
      
              // Read 1 pair of voltage values
              digitalWrite(phase_a, HIGH);                 // set the voltage supply on
              delayMicroseconds(25);
              supplyVoltage = analogRead(analog_input);   // read the supply voltage
              delayMicroseconds(25);
              digitalWrite(phase_a, LOW);                  // set the voltage supply off
              delay(1);
      
              digitalWrite(phase_b, HIGH);                 // set the voltage supply on
              delayMicroseconds(25);
              sensorVoltage = analogRead(analog_input);   // read the sensor voltage
              delayMicroseconds(25);
              digitalWrite(phase_b, LOW);                  // set the voltage supply off
      
              // Calculate resistance
              // the 0.5 add-term is used to round to the nearest integer
              // Tip: no need to transform 0-1023 voltage value to 0-5 range, due to following fraction
              long resistance = (knownResistor * (supplyVoltage - sensorVoltage ) / sensorVoltage) ;
      
              delay(1);
              addReading(resistance);
              Serial.print (resistance);
              Serial.print ("\t");
          }
      }
      
      
      
      // Averaging algorithm
      void addReading(long resistance)
      {
          buffer[index] = resistance;
          index++;
          if (index >= NUM_READS) {
              index = 0;
          }
      }
      
      long average()
      {
          long sum = 0;
          for (int i = 0; i < NUM_READS; i++) {
              sum += buffer[i];
          }
          return (long)(sum / NUM_READS);
      }
      
      posted in My Project
      Dennis van der Wolf
      Dennis van der Wolf
    • RE: Office plant monitoring

      Re: Office plant monitoring
      Hello, i have build the sensor from the building page. I directly connect the fork to pin D6,D7. When i show the measurement i see strange values. anyone an idea what i did wrong?

      09.02.2017 19:22:23	Multi Sensor (multi2)	SoilMoistPercentageSensor	3 %
      09.02.2017 19:16:51	Multi Sensor (multi2)	SoilMoistPercentageSensor	0 %
      09.02.2017 19:11:20	Multi Sensor (multi2)	SoilMoistPercentageSensor	3 %
      09.02.2017 19:05:48	Multi Sensor (multi2)	SoilMoistPercentageSensor	5 %
      09.02.2017 19:00:17	Multi Sensor (multi2)	SoilMoistPercentageSensor	-1 %
      09.02.2017 18:54:46	Multi Sensor (multi2)	SoilMoistPercentageSensor	8 %
      09.02.2017 18:48:41	Multi Sensor (multi2)	SoilMoistPercentageSensor	5 %
      09.02.2017 18:43:10	Multi Sensor (multi2)	SoilMoistPercentageSensor	6 %
      09.02.2017 18:37:38	Multi Sensor (multi2)	SoilMoistPercentageSensor	1 %
      09.02.2017 18:32:07	Multi Sensor (multi2)	SoilMoistPercentageSensor	-1 %
      09.02.2017 18:26:36	Multi Sensor (multi2)	SoilMoistPercentageSensor	-1 %
      09.02.2017 18:21:04	Multi Sensor (multi2)	SoilMoistPercentageSensor	4 %
      09.02.2017 18:15:33	Multi Sensor (multi2)	SoilMoistPercentageSensor	4 %
      09.02.2017 18:10:02	Multi Sensor (multi2)	SoilMoistPercentageSensor	6 %
      09.02.2017 18:03:57	Multi Sensor (multi2)	SoilMoistPercentageSensor	6 %
      09.02.2017 17:58:26	Multi Sensor (multi2)	SoilMoistPercentageSensor	0 %
      09.02.2017 17:52:54	Multi Sensor (multi2)	SoilMoistPercentageSensor	6 %
      09.02.2017 17:46:50	Multi Sensor (multi2)	SoilMoistPercentageSensor	5 %
      09.02.2017 17:41:19	Multi Sensor (multi2)	SoilMoistPercentageSensor	-1 %
      09.02.2017 17:34:41	Multi Sensor (multi2)	SoilMoistPercentageSensor	6 %
      09.02.2017 17:29:10	Multi Sensor (multi2)	SoilMoistPercentageSensor	-3 %
      09.02.2017 17:23:39	Multi Sensor (multi2)	SoilMoistPercentageSensor	-11 %
      
      posted in My Project
      Dennis van der Wolf
      Dennis van der Wolf
    • RE: 💬 Light Level Sensor - BH1750

      @checkup Hi, i have done that a few times now. Unfortunately, with the same result.

      posted in Announcements
      Dennis van der Wolf
      Dennis van der Wolf
    • RE: 💬 Light Level Sensor - BH1750

      Hi,

      I have connected my BH1750 to an Arduino nano as indicated above. After that i uploaded the sketch. I defined a node id 16 and child id 1. Nothing is happend. When i read the log it's says child id 255
      debug [pimatic-mysensors]: <- I_LOG_MESSAGE 0;255;3;0;9;TSP:MSG:BC
      19:55:26debug [pimatic-mysensors]: <- I_LOG_MESSAGE 0;255;3;0;9;TSP:MSG:READ 16-16-255 s=255,c=3,t=7,pt=0,l=0,sg=0:
      19:55:25debug [pimatic-mysensors]: <- I_LOG_MESSAGE 0;255;3;0;9;!TSP:MSG:SEND 0-0-16-16 s=255,c=3,t=8,pt=1,l=1,sg=0,ft=0,st=fail:0
      19:55:24debug [pimatic-mysensors]: <- I_LOG_MESSAGE 0;255;3;0;9;TSP:MSG:GWL OK
      19:55:24debug [pimatic-mysensors]: <- I_LOG_MESSAGE 0;255;3;0;9;TSP:CHKUPL:OK (FLDCTRL)
      19:55:24debug [pimatic-mysensors]: <- I_LOG_MESSAGE 0;255;3;0;9;TSP:MSG:FPAR REQ (sender=16)

      I don't know what i did wrong. Anyone an idea?

      posted in Announcements
      Dennis van der Wolf
      Dennis van der Wolf