А вы когда-нибудь хотели узнать, когда ваши растения нужно поливать? Тогда это статья для вас.
Есть несколько водных датчиков и мы пробовали почвы, дождя и датчики уровня воды.
Датчики почвы имеют цифровой и аналоговые выходы. Уровень срабатывания цифрового выхода можно отрегулировать подстроечным резистором на модуле датчика. Мы будем использовать только цифровой выход датчика в нашем примере
Подключение
Начните с подключения радио.
Сенсор | Arduino | Комментарий |
---|---|---|
GND | GND | Черный |
VCC | VCC (3.3 — 5V) | Красный |
DO (digital out) | Digital pin 3 | Зеленый |
130
Пример
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 |
/* * 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) 2013-2019 Sensnology AB * Full contributor list: https://github.com/mysensors/MySensors/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 measuring * * 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_RF24 //#define MY_RADIO_NRF5_ESB //#define MY_RADIO_RFM69 //#define MY_RADIO_RFM95 #include <math.h> // Conversion equation from resistance to % #include <MySensors.h> // Setting up format for reading 3 soil sensors #define NUM_READS (int)10 // Number of sensor reads for filtering #define CHILD_ID 0 MyMessage msg(CHILD_ID, V_LEVEL); uint32_t SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds) long buffer[NUM_READS]; int idx; /// @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((int32_t)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[idx] = resistance; idx++; if (idx >= NUM_READS) { idx = 0; } } long average() { long sum = 0; for (int cnt = 0; cnt < NUM_READS; cnt++) { sum += buffer[cnt]; } return (long)(sum / NUM_READS); } |
Перевёл Антон Вотчицев