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Add ESP32 example
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@ -91,7 +91,10 @@ void setup(void) {
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Serial.print("Connecting to: ");
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Serial.print(config.address);
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Serial.print(":");
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Serial.println(config.port);
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Serial.print(config.port);
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Serial.print(" every ");
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Serial.print(TELEMETRY_DELAY);
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Serial.println("s");
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#if USE_INTERNAL_NTP
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timeClient.setPoolServerIP(config.address);
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1
esp32/libraries/ArduinoJson
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esp32/libraries/ArduinoJson
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@ -0,0 +1 @@
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../../arduino/libraries/ArduinoJson
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esp32/libraries/Ethernet
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esp32/libraries/Ethernet
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../../arduino/libraries/Ethernet
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esp32/libraries/NTPClient
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esp32/libraries/NTPClient
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../../arduino/libraries/NTPClient
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esp32/libraries/pubsubclient
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esp32/libraries/pubsubclient
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../../arduino/libraries/pubsubclient
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193
esp32/rssiHall/rssiHall.ino
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193
esp32/rssiHall/rssiHall.ino
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@ -0,0 +1,193 @@
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/* -*- coding: utf-8 -*-
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* vim: tabstop=2 shiftwidth=2 softtabstop=2
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*
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* BITE - A Basic/IoT/Example
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* Copyright (C) 2020-2021 Daniele Viganò <daniele@vigano.me>
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*
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* BITE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* BITE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <EEPROM.h>
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#include <WiFi.h>
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#include <WiFiUdp.h>
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#include <PubSubClient.h>
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#include <NTPClient.h>
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#include <ArduinoJson.h>
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#define DEBUG_TO_SERIAL 1 // debug on serial port
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#define USE_MQTT 1 // use mqtt protocol instead of http post
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#define USE_INTERNAL_NTP 1 // use default ntp server or the internal one
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#define TELEMETRY_DELAY 10 // second between telemetry samples
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// const String serverName = "sensor.server.domain";
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const size_t capacity = 2 * JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(2) + 20;
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DynamicJsonDocument telemetry(capacity);
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JsonObject payload = telemetry.createNestedObject("payload");
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unsigned int counter = 0;
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WiFiUDP ntpUDP;
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NTPClient timeClient(ntpUDP);
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bool NTPValid = false;
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WiFiClient ethClient;
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PubSubClient clientMQTT(ethClient);
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const char* ssid = "";
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const char* password = "";
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const char* serial = "esp32_1";
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struct netConfig {
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IPAddress address;
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unsigned int port;
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};
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netConfig config = {
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{192, 168, 10, 123},
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80
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};
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const String apiURL = "/api/device/subscribe/";
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const String telemetryURL = "/telemetry/";
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void setup(void) {
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Serial.begin(115200);
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StaticJsonDocument<64> api;
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/*
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int eeAddress = 0;
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EEPROM.get(eeAddress, serial);
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eeAddress += sizeof(serial);
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EEPROM.get(eeAddress, config);
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*/
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Serial.println("Starting connecting WiFi.");
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delay(10);
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WiFi.begin(ssid, password);
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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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}
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Serial.println("WiFi connected");
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Serial.print("IoT #");
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Serial.print(serial);
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Serial.print(" at address: ");
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Serial.println(WiFi.localIP());
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Serial.println();
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Serial.print("Connecting to: ");
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Serial.print(config.address);
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Serial.print(":");
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Serial.print(config.port);
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Serial.print(" every ");
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Serial.print(TELEMETRY_DELAY);
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Serial.println("s");
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#if USE_INTERNAL_NTP
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timeClient.setPoolServerIP(config.address);
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#endif
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timeClient.begin();
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if (timeClient.update()) {
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NTPValid = true;
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}
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#if DEBUG_TO_SERIAL
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Serial.println("DEBUG: clock updated via NTP.");
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#endif
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api["serial"] = serial;
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postData(config, apiURL, api);
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telemetry["device"] = serial;
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// payload["id"] = serverName;
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#if USE_MQTT
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clientMQTT.setServer(config.address, 1883);
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#endif
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}
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void loop(void) {
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const int postDelay = TELEMETRY_DELAY * 1000;
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if (NTPValid) {
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telemetry["clock"] = timeClient.getEpochTime();
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} else {
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telemetry["clock"] = NULL; // converted into 0
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}
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payload["hall"] = hallRead();
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payload["wifi-rssi"] = WiFi.RSSI();
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#if USE_MQTT
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publishData(config, telemetry);
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#else
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postData(config, telemetryURL, telemetry);
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#endif
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if (counter == 6 * 120) { // Update clock every 6 times * 10 sec * 120 minutes = 2 hrs
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timeClient.update();
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counter = 0;
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#if DEBUG_TO_SERIAL
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Serial.println("DEBUG: clock updated via NTP.");
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#endif
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} else {
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counter++;
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}
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delay(postDelay);
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}
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#if USE_MQTT
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void publishData(const netConfig &mqtt, const DynamicJsonDocument &json) {
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if (clientMQTT.connect(serial)) {
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char buffer[256];
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serializeJson(json, buffer);
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clientMQTT.publish(serial, buffer);
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#if DEBUG_TO_SERIAL
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Serial.println("DEBUG: MQTT PUBLISH>>>");
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serializeJsonPretty(json, Serial);
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Serial.println("\n<<<");
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#endif
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}
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}
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#endif
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void postData(const netConfig &postAPI, const String &URL, const DynamicJsonDocument &json) {
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if (ethClient.connect(postAPI.address, postAPI.port)) {
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ethClient.print("POST ");
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ethClient.print(URL);
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ethClient.println(" HTTP/1.1");
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ethClient.print("Host: ");
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ethClient.print(postAPI.address);
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ethClient.print(":");
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ethClient.println(postAPI.port);
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ethClient.println("Content-Type: application/json");
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ethClient.print("Content-Length: ");
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ethClient.println(measureJson(json));
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ethClient.println("Connection: close");
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ethClient.println();
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serializeJson(json, ethClient);
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ethClient.stop();
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#if DEBUG_TO_SERIAL
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Serial.println("DEBUG: HTTP POST>>>");
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serializeJsonPretty(json, Serial);
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Serial.println("\n<<<");
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#endif
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}
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}
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