295 lines
7.5 KiB
C++
295 lines
7.5 KiB
C++
#include <bitset>
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#include <string>
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// #include <ArduinoJson.h>
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#include <WiFi.h>
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#include "settings.h"
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#ifdef WIFI_ENTERPRISE_ENABLED
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// Ref https://github.com/martinius96/ESP32-WPA2-enterprise/blob/master/ESP32_WPA2enterprise.ino
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#include "esp_wpa2.h"
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#include "esp_wifi.h"
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#endif
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#ifdef MQTT_NO_TLS
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#include <WiFiClient.h>
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#else
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#include <WiFiClientSecure.h>
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#endif
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#include <PubSubClient.h>
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// These libraries need installing in the Arduino IDE Library Manager (if you install the BME280 one it should prompt for the unified sensor library automatically)
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#include <Adafruit_Sensor.h>
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#include <Adafruit_BME280.h>
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// WAS D5 D6 D7
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#define MULTIPLEX_PINA 17
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#define MULTIPLEX_PINB 16
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#define MULTIPLEX_PINC 4
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// WAS A0
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#define ANALOG_PIN 34
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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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#define REFERENCE_VOLTAGE 3.3
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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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#ifndef MQTT_NO_TLS
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WiFiClientSecure transport;
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#else
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WiFiClient transport;
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#endif
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PubSubClient mqtt;
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Adafruit_BME280 bme; // I2C
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void connect_wifi() {
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#ifndef WIFI_ENTERPRISE_ENABLED
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Serial.print("personal");
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WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
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#else
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Serial.print("enterprise");
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// Ref https://github.com/martinius96/ESP32-WPA2-enterprise/blob/master/ESP32_WPA2enterprise.ino
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// For ESP32 ONLY! For esp8266, see the code with the esp8266-last tag, which is the last commit that supports the esp8266.
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WiFi.disconnect(true);
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WiFi.mode(WIFI_STA);
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const char* user = WIFI_ENTERPRISE_USERNAME;
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const char* pass = WIFI_ENTERPRISE_PASSWORD;
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// 'esp_wifi_sta_wpa2_ent_set_identity' was not declared in this scope :-(
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esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT();
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esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)user, strlen(user));
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esp_wifi_sta_wpa2_ent_set_username((uint8_t *)user, strlen(user));
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esp_wifi_sta_wpa2_ent_set_password((uint8_t *)pass, strlen(pass));
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esp_wifi_sta_wpa2_ent_enable(&config);
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// esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT();
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// esp_wifi_sta_wpa2_ent_enable(&config);
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WiFi.begin(WIFI_SSID);
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#endif
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}
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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 * REFERENCE_VOLTAGE;
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return parsedValue;
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}
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bool send_mqtt(String id, String sensor, float value) {
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// StaticJsonDocument<96> data;
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//
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// data["id"] = id;
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// data["sensor"] = sensor;
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// data["value"] = value;
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String payload = "{\"id\": \""+id+"\",\"sensor\": \""+sensor+"\",\"value\": "+String(value)+"}";
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// int length = measureJson(&data);
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// char* payload = new char[length]();
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// serializeJson(data, payload, length);
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bool result = mqtt.publish("sensors/data", payload.c_str());
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// delete[] payload;
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return result;
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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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// Enterprise WiFi example:
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// https://gist.github.com/Matheus-Garbelini/2cd780aed2eddbe17eb4adb5eca42bd6
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// TODO Add support for enterprise WiFi here so we can connect to eduroam
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Serial.print("WIFI: ");
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connect_wifi();
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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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#ifdef MQTT_NO_TLS
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Serial.print("notls");
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#else
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Serial.print("tls");
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transport.setInsecure(); Serial.print(".");
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#endif
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// mqtt.setBufferSize(1000);
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mqtt.setClient(transport); Serial.print(".");
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mqtt.setServer(MQTT_SERVER, MQTT_PORT); Serial.print(".");
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// Serial.print(MQTT_SERVER);
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// Serial.print(":");
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// Serial.print(MQTT_PORT);
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// Serial.print(".");
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if(!mqtt.connect(
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("autoplant_" + String(random(0, 999999))).c_str(),
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MQTT_USERNAME, MQTT_PASSWORD)
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) {
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/* Ref https://pubsubclient.knolleary.net/api#state
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-4 : MQTT_CONNECTION_TIMEOUT - the server didn't respond within the keepalive time
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-3 : MQTT_CONNECTION_LOST - the network connection was broken
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-2 : MQTT_CONNECT_FAILED - the network connection failed
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-1 : MQTT_DISCONNECTED - the client is disconnected cleanly
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0 : MQTT_CONNECTED - the client is connected
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1 : MQTT_CONNECT_BAD_PROTOCOL - the server doesn't support the requested version of MQTT
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2 : MQTT_CONNECT_BAD_CLIENT_ID - the server rejected the client identifier
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3 : MQTT_CONNECT_UNAVAILABLE - the server was unable to accept the connection
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4 : MQTT_CONNECT_BAD_CREDENTIALS - the username/password were rejected
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5 : MQTT_CONNECT_UNAUTHORIZED - the client was not authorized to connect
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*/
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int error_code = mqtt.state();
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Serial.println("failed, error code "+String(error_code));
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while(true) delay(10000);
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}
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Serial.println("ok");
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Serial.print("BME280: ");
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if(!bme.begin(0x76)) {
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Serial.println("failed!");
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}
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else {
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Serial.println("ok");
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}
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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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float temp = bme.readTemperature();
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float humidity = bme.readHumidity();
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float pressure = bme.readPressure() / 100.0F;
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// StaticJsonDocument<96> data;
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if(!send_mqtt(
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"autoplant-a",
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"soil",
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soil_a
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)) Serial.println("[mqtt] Failed to send message");
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if(!send_mqtt(
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"autoplant-a",
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"water-level",
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water_level_a
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)) Serial.println("[mqtt] Failed to send message");
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if(!send_mqtt(
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"autoplant-b",
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"soil",
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soil_b
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)) Serial.println("[mqtt] Failed to send message");
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if(!send_mqtt(
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"autoplant-b",
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"water-level",
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water_level_b
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)) Serial.println("[mqtt] Failed to send message");
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if(!send_mqtt(
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"autoplant-a",
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"temperature",
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temp
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)) Serial.println("[mqtt] Failed to send message");
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if(!send_mqtt(
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"autoplant-a",
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"humidity",
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humidity
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)) Serial.println("[mqtt] Failed to send message");
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if(!send_mqtt(
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"autoplant-a",
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"pressure",
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pressure
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)) Serial.println("[mqtt] Failed to send message");
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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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//
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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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//
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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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//
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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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