150 lines
3.3 KiB
C++
150 lines
3.3 KiB
C++
#include <bitset>
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#include <string>
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#include <ArduinoJson.h>
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#include <ESP8266WiFi.h>
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#include "../lib/pubsubclient/src/PubSubClient.h"
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#include "../lib/pubsubclient/src/PubSubClient.cpp"
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#include "settings.h"
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#define MULTIPLEX_PINA D5
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#define MULTIPLEX_PINB D6
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#define MULTIPLEX_PINC D7
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#define ANALOG_PIN A0
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/*
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000 0
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001 1
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010 2
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011 3
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100 4
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101 5
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110 6
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111 7
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*/
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#define SOIL_A 0
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#define SOIL_B 6
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#define WATER_LEVEL_A 2
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#define WATER_LEVEL_B 4
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// Ref https://stackoverflow.com/a/523737/1460422
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#define CHECK_BIT(var,pos) ((var) & (1<<(pos)))
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int soilPin = D3;
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float referenceVoltage = 3.3;
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WiFiClientSecure transport;
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PubSubClient mqtt;
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float read_analog(int channel) {
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const char* bin = std::bitset<8>(channel).to_string().c_str();
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bool b0 = bin[7] == u'1';
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bool b1 = bin[6] == u'1';
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bool b2 = bin[5] == u'1';
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digitalWrite(MULTIPLEX_PINA, b2);
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digitalWrite(MULTIPLEX_PINB, b1);
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digitalWrite(MULTIPLEX_PINC, b0);
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int rawValue = analogRead(ANALOG_PIN);
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float parsedValue = ((float)rawValue) / 1024.0 * referenceVoltage;
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return parsedValue;
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}
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bool send_mqtt(StaticJsonDocument data) {
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int length = measureJson(data);
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char[length] payload;
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serialiseJson(data, &payload, length);
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return rmqtt.publish("sensors/data", payload, length)
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}
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void setup() {
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Serial.begin(9600);
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delay(1000);
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Serial.println("\nAnalogue Soil Sensor Test");
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Serial.println("=========================");
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Serial.print("PIN MODES: ");
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pinMode(MULTIPLEX_PINA, OUTPUT);
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pinMode(MULTIPLEX_PINB, OUTPUT);
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pinMode(MULTIPLEX_PINC, OUTPUT);
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Serial.println("ok");
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Serial.print("WIFI: ");
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WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
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int attempts = 0;
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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attempts++;
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if(attempts > 25)
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break;
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}
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if(WiFi.status() == WL_CONNECTED) {
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Serial.print("ok, IP: ");
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Serial.println(WiFi.localIP());
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}
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else {
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// Ref https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/readme.html#check-return-codes
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Serial.print("failed, error code ");
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Serial.println(WiFi.status());
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}
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Serial.print("MQTT: ");
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mqtt.setClient(transport);
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mqtt.setServer("autoplant" + String(random(0, 999999)));
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if(!mqtt.connect(MQTT_USERNAME, MQTT_PASSWORD)) {
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Serial.println("failed!");
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while(true) delay(10000);
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}
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Serial.println("ok");
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}
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void loop() {
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float soil_a = read_analog(SOIL_A);
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float soil_b = read_analog(SOIL_B);
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float water_level_a = read_analog(WATER_LEVEL_A);
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float water_level_b = read_analog(WATER_LEVEL_B);
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StaticJsonDocument<96> data;
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data["id"] = "autoplant-a";
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data["sensor"] = "soil";
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data["value"] = soil_a;
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if(!send_mqtt(data)) Serial.println("[mqtt] Failed to send message");
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data["sensor"] = "water-level";
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data["value"] = water_level_a;
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if(!send_mqtt(data)) Serial.println("[mqtt] Failed to send message");
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data["id"] = "autoplant-b";
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data["value"] = water_level_a;
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if(!send_mqtt(data)) Serial.println("[mqtt] Failed to send message");
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data["sensor"] = "soil";
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data["value"] = soil_a;
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if(!send_mqtt(data)) Serial.println("[mqtt] Failed to send message");
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Serial.print("SOIL_A\t");
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Serial.println(soil_a);
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Serial.print("SOIL_B\t");
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Serial.println(soil_b);
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Serial.print("WATER_LEVEL_A\t");
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Serial.println(water_level_a);
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Serial.print("WATER_LEVEL_B\t");
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Serial.println(water_level_b);
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Serial.println("\n\n\n\n\n");
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delay(INTERVAL);
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}
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