matt-bathyscope/ping1d-esp32-demo.ino Secret

## ping1d-esp32-demo.ino
// Demo of ESP32 serving Ping1D sensor data via web interface
// Tested on a SparkFun ESP32 MicroMod with ATP carrier board
// ESP32 Arduino Core version 2.0.2
// Blue Robotics ping-arduino version 0.1.2 (930afed)
// ArduinoJson version 6.19.2

// ESP32 Arduino core
#include <WiFi.h>
#include <WiFiClient.h>
#include <WiFiAP.h>
#include <WebServer.h>
#include <ESPmDNS.h>

// Blue Robotics Ping library
#include <ping1d.h>

// ArduinoJson library
#include <ArduinoJson.h>

const char *ssid = "ping"; // WiFi SSID for the network the ESP32 will create
const char *pass = "PingDemo!"; // WiFi password for the network the ESP32 will create
const char *host = "ping"; // hostname used for mDNS - you can navigate to http://ping.local

// IP address scheme used for the SoftAP
IPAddress esp32_ip(192, 168, 3, 1);
IPAddress gateway(192, 168, 3, 1);
IPAddress subnet(255, 255, 255, 0);

Ping1D ping { Serial2 }; // Serial2 is pins 16 and 17

WebServer server(80);

void handleRoot() {
  // send the static page contents
  // in a real application this should probably come from SPIFFS rather than being hardcoded
  server.send(200, "text/html", "<!DOCTYPE html><html><head><title>ESP32 Ping1D Demo</title><script>function updateState() { const xhr = new XMLHttpRequest(); xhr.onload = function() { stateData = JSON.parse(this.responseText); document.getElementById('distance').innerHTML = stateData['distance']; document.getElementById('confidence').innerHTML = stateData['confidence']; }; xhr.open('GET', 'state'); xhr.send(); }</script></head><body><h1>ESP32 Ping1D Demo</h1><table><tr><td><b>Distance</b></td><td><div id='distance'></div></td></tr><tr><td><b>Confidence</b></td><td><div id='confidence'></div></td</tr></table><script>window.setInterval(updateState, 1000);</script></body></html>");
}

void handleState() {

  // return the latest values from the Ping1D in a JSON dictionary
  // in a real application this should be dynamically allocated and there should be bounds checking on serialization to a buffer
  StaticJsonDocument<200> jsonDoc;
  jsonDoc["distance"] = ping.distance();
  jsonDoc["confidence"] = ping.confidence();
  char payload[100];
  serializeJson(jsonDoc, payload);

  server.send(200, "application/json", payload);
}

void handle404() {
  server.send(404, "text/plain", "Resource not found");
}

void setup() {

  // init UARTs
  Serial.begin(115200); // monitor UART - exposed to USB
  Serial2.begin(115200); // Ping1D UART on pin 16 and 17

  // configure ESP32 as an AP
  WiFi.softAP(ssid, pass);
  WiFi.softAPConfig(esp32_ip, gateway, subnet);
  Serial.println("SoftAP configured");

  // init mDNS
  if (MDNS.begin(host)) {
    Serial.println("mDNS started");
  }

  server.on("/", handleRoot); // serves the HTML and JavaScript code
  server.on("/state", handleState); // responds with the JSON encoded Ping1D state
  server.onNotFound(handle404); // catch all - responds with HTTP 404
  server.begin();
  Serial.println("HTTP server started");

  // advertise the _http._tcp service
  MDNS.addService("http", "tcp", 80);
  Serial.println("Advertising _http._tcp");
}

void loop() {
  ping.update(); // Ping1D housekeeping
  server.handleClient(); // HTTP server housekeeping
  delay(2); // yield
}
	// Demo of ESP32 serving Ping1D sensor data via web interface
	// Tested on a SparkFun ESP32 MicroMod with ATP carrier board
	// ESP32 Arduino Core version 2.0.2
	// Blue Robotics ping-arduino version 0.1.2 (930afed)
	// ArduinoJson version 6.19.2

	// ESP32 Arduino core
	#include <WiFi.h>
	#include <WiFiClient.h>
	#include <WiFiAP.h>
	#include <WebServer.h>
	#include <ESPmDNS.h>

	// Blue Robotics Ping library
	#include <ping1d.h>

	// ArduinoJson library
	#include <ArduinoJson.h>

	const char *ssid = "ping"; // WiFi SSID for the network the ESP32 will create
	const char *pass = "PingDemo!"; // WiFi password for the network the ESP32 will create
	const char *host = "ping"; // hostname used for mDNS - you can navigate to http://ping.local

	// IP address scheme used for the SoftAP
	IPAddress esp32_ip(192, 168, 3, 1);
	IPAddress gateway(192, 168, 3, 1);
	IPAddress subnet(255, 255, 255, 0);

	Ping1D ping { Serial2 }; // Serial2 is pins 16 and 17

	WebServer server(80);

	void handleRoot() {
	// send the static page contents
	// in a real application this should probably come from SPIFFS rather than being hardcoded
	server.send(200, "text/html", "<!DOCTYPE html><html><head><title>ESP32 Ping1D Demo</title><script>function updateState() { const xhr = new XMLHttpRequest(); xhr.onload = function() { stateData = JSON.parse(this.responseText); document.getElementById('distance').innerHTML = stateData['distance']; document.getElementById('confidence').innerHTML = stateData['confidence']; }; xhr.open('GET', 'state'); xhr.send(); }</script></head><body><h1>ESP32 Ping1D Demo</h1><table><tr><td><b>Distance</b></td><td><div id='distance'></div></td></tr><tr><td><b>Confidence</b></td><td><div id='confidence'></div></td</tr></table><script>window.setInterval(updateState, 1000);</script></body></html>");
	}

	void handleState() {

	// return the latest values from the Ping1D in a JSON dictionary
	// in a real application this should be dynamically allocated and there should be bounds checking on serialization to a buffer
	StaticJsonDocument<200> jsonDoc;
	jsonDoc["distance"] = ping.distance();
	jsonDoc["confidence"] = ping.confidence();
	char payload[100];
	serializeJson(jsonDoc, payload);

	server.send(200, "application/json", payload);
	}

	void handle404() {
	server.send(404, "text/plain", "Resource not found");
	}

	void setup() {

	// init UARTs
	Serial.begin(115200); // monitor UART - exposed to USB
	Serial2.begin(115200); // Ping1D UART on pin 16 and 17

	// configure ESP32 as an AP
	WiFi.softAP(ssid, pass);
	WiFi.softAPConfig(esp32_ip, gateway, subnet);
	Serial.println("SoftAP configured");

	// init mDNS
	if (MDNS.begin(host)) {
	Serial.println("mDNS started");
	}

	server.on("/", handleRoot); // serves the HTML and JavaScript code
	server.on("/state", handleState); // responds with the JSON encoded Ping1D state
	server.onNotFound(handle404); // catch all - responds with HTTP 404
	server.begin();
	Serial.println("HTTP server started");

	// advertise the _http._tcp service
	MDNS.addService("http", "tcp", 80);
	Serial.println("Advertising _http._tcp");
	}

	void loop() {
	ping.update(); // Ping1D housekeeping
	server.handleClient(); // HTTP server housekeeping
	delay(2); // yield
	}