Implement initial somewhat naive version
This commit is contained in:
Lomanic
commit
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# SpaceAPI notifier
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Nodemcu v0.9/v3 + MAX7219 LED matrix display project.
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Displays configurable message on the display when the (also configurable) [SpaceAPI](https://spaceapi.io) endpoint state is open.
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Initial WiFi configuration is done by connecting to the SPACEAPI NOTIFIER access point and going through WifiManager captive portal.
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Custom SpaceAPI endpoint to query, displayed message configuration is then done on http://spaceapi-notifier.local/.
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All parameters (WiFi and customizations) can be reset by pressing GPIO0 (flash button on Nodemcu) continuously until the LED_BUILTIN blinks.
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You then have to reconfigure the WiFi and custom settings.
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## Hardware
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* [V3 4M bytes (32Mbits) FLASH NodeMcu Lua WIFI Networking development board Based ESP8266 with firmware](https://www.aliexpress.com/item/32565317233.html)
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* [MAX7219 Dot Matrix Module For Microcontroller 4 In One Display with 5P Line](https://www.aliexpress.com/item/32616345083.html)
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## Software
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Install the Arduino IDE
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Needed dependencies (tested with these versions):
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* WiFiManager 0.16.0
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* MD_MAX72XX 3.3.0
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* MD_Parola 3.5.6
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/*
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This sketch displays a message on a LED matrix display when a given spaceapi endpoint tells a space is open
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Based off a Nodemcu 0.9 (or v3) and MAX72XX-based LED matrix display
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Pinout:
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D1 mini Matrix display
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5V VCC
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GND GND
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D5 DIN
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D6 CS
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D7 CLK
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Yes, these pins are both sequential on both ends
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*/
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#include <FS.h> //this needs to be first, or it all crashes and burns...
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#include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino
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//needed for library
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#include <DNSServer.h>
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#include <ESP8266WebServer.h>
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#include <WiFiManager.h> //https://github.com/tzapu/WiFiManager
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#define ARDUINOJSON_DECODE_UNICODE 1
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#include <ArduinoJson.h> //https://github.com/bblanchon/ArduinoJson
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#include <ESP8266mDNS.h> // https://tttapa.github.io/ESP8266/Chap08%20-%20mDNS.html
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#include <WiFiClientSecure.h>
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//for LED status
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#include <Ticker.h>
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Ticker ledTicker;
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const byte LED_PIN = LED_BUILTIN; // 13 for Sonoff S20, 2 for NodeMCU/ESP12 internal LED
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const byte BUTTON_PIN = 0;
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bool spaceIsOpen = false;
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#include <MD_Parola.h> // https://github.com/MajicDesigns/MD_Parola/blob/main/examples/Parola_HelloWorld/Parola_HelloWorld.ino
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#include <MD_MAX72xx.h>
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#include <SPI.h>
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// Define the number of devices we have in the chain and the hardware interface
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// NOTE: These pin numbers will probably not work with your hardware and may
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// need to be adapted
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#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
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#define MAX_DEVICES 4
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#define DATA_PIN D5 // or MOSI
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#define CS_PIN D6 // or SS
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#define CLK_PIN D7 // or SCK
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// SPI hardware interface
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//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
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// Arbitrary pins
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//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
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MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
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void blinkLED() {
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//toggle state
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bool state = digitalRead(LED_PIN); // get the current state of LED_PIN pin
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digitalWrite(LED_PIN, !state); // set pin to the opposite state
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}
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//gets called when WiFiManager enters configuration mode (for LED status)
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void configModeCallback (WiFiManager *myWiFiManager) {
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Serial.println("Entered config mode");
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Serial.println(WiFi.softAPIP());
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//if you used auto generated SSID, print it
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Serial.println(myWiFiManager->getConfigPortalSSID());
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//entered config mode, make led toggle faster
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ledTicker.attach(0.5, blinkLED);
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}
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//define your default values here, if there are different values in config.json, they are overwritten.
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String displayedMessage = "FUZ";
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String spaceAPIEndpoint = "https://spaceapi.fuz.re/";
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//flag for saving data
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bool shouldSaveConfig = false;
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//callback checking us of the need to save config
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void saveConfigCallback () {
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Serial.println(F("Should save config"));
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shouldSaveConfig = true;
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}
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WiFiManager wifiManager;
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#include <ESP8266HTTPClient.h> // for https://github.com/matt-williams/matrix-esp8266/blob/master/matrix-esp8266.ino
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ESP8266WebServer httpServer(80); // webserver on port 80 https://github.com/esp8266/Arduino/blob/14262af0d19a9a3b992d5aa310a684d47b6fb876/libraries/ESP8266WebServer/examples/AdvancedWebServer/AdvancedWebServer.ino
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void handleRoot() {
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for (int i = 0; i < httpServer.args(); i++) {
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if (httpServer.argName(i) == "resetesp") {
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httpServer.sendHeader("Location", httpServer.uri(), true);
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httpServer.send(302, "text/plain", "");
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delay(500);
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ESP.restart();
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return;
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}
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}
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if (httpServer.method() == HTTP_POST) {
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for (int i = 0; i < httpServer.args(); i++) {
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if (httpServer.argName(i) == "displayedMessage") {
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displayedMessage = httpServer.arg(i);
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continue;
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}
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if (httpServer.argName(i) == "spaceAPIEndpoint") {
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spaceAPIEndpoint = httpServer.arg(i);
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continue;
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}
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}
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Serial.println(F("saving config"));
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const size_t capacity = JSON_OBJECT_SIZE(3) + 440; // https://arduinojson.org/v6/assistant/
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DynamicJsonDocument jsonBuffer(capacity);
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jsonBuffer["displayedMessage"] = displayedMessage;
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jsonBuffer["spaceAPIEndpoint"] = spaceAPIEndpoint;
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File configFile = SPIFFS.open("/config.json", "w");
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if (!configFile) {
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Serial.println(F("failed to open config file for writing"));
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}
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serializeJson(jsonBuffer, Serial);
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Serial.println();
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serializeJson(jsonBuffer, configFile);
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configFile.close();
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}
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if (httpServer.args() > 0 || httpServer.method() == HTTP_POST) { // trim GET parameters and prevent resubmiting same form on refresh
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httpServer.sendHeader("Location", httpServer.uri(), true);
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return httpServer.send(302, "text/plain", "");
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}
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String html =
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String("<!DOCTYPE HTML><html>") +
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"<head><meta charset=utf-8><title>SpaceAPI notifier</title></head><body>" +
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"status: " + (spaceIsOpen ? "opened" : "closed") + "<br>" +
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"<a href='?resetesp'>Reboot ESP</a>" + "<br><br>" +
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"<form method='post'>" +
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"<div><label for='displayedMessage'>displayedMessage </label><input name='displayedMessage' id='displayedMessage' value='" + displayedMessage + "'></div>" +
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"<div><label for='spaceAPIEndpoint'>spaceAPIEndpoint </label><input name='spaceAPIEndpoint' id='spaceAPIEndpoint' value='" + spaceAPIEndpoint + "'></div>" +
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"<div><button>Submit</button></div></form>"
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"</body></html>";
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httpServer.send(200, "text/html", html);
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}
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void handleNotFound() {
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httpServer.send(404, "text/plain", httpServer.uri() + " not found");
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}
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BearSSL::WiFiClientSecure secureClient;
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HTTPClient http;
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bool checkSpaceIsOpen() {
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http.useHTTP10(true); // https://arduinojson.org/v6/how-to/use-arduinojson-with-httpclient/
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http.begin(secureClient, spaceAPIEndpoint);
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int httpCode = http.GET();
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//Serial.println("checkSpaceIsOpen body: " + http.getString());
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Serial.println("checkSpaceIsOpen return code: " + String(httpCode));
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ledTicker.detach();
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digitalWrite(LED_PIN, LOW); // ensure the LED is lit
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if (httpCode != 200) { // something is wrong, bad network or misconfigured credentials
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ledTicker.attach(0.1, blinkLED);
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}
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StaticJsonDocument<16> filter; // https://arduinojson.org/v6/assistant/
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filter["state"] = true;
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StaticJsonDocument<256> doc;
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DeserializationError error = deserializeJson(doc, http.getStream(), DeserializationOption::Filter(filter));
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if (error) {
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Serial.print(F("deserializeJson() failed: "));
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Serial.println(error.f_str());
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ledTicker.attach(0.1, blinkLED);
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return false;
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} else {
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Serial.println(F("deserializeJson() successful:"));
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}
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bool state_open = doc["state"]["open"]; // false
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serializeJsonPretty(doc, Serial);
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Serial.println();
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http.end();
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bool m0 = doc["state"]["open"];
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return m0;
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}
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void setup() {
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Serial.begin(115200);
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Serial.println();
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//set led pin as output
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pinMode(LED_PIN, OUTPUT);
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//set button pin as input
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pinMode(BUTTON_PIN, INPUT);
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// start ledTicker with 1 because we start in AP mode and try to connect
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ledTicker.attach(1.1, blinkLED);
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Serial.println(F("mounting FS..."));
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if (SPIFFS.begin()) {
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Serial.println(F("mounted file system"));
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if (SPIFFS.exists("/config.json")) {
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//file exists, reading and loading
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Serial.println(F("reading config file"));
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File configFile = SPIFFS.open("/config.json", "r");
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if (configFile) {
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Serial.println(F("opened config file"));
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size_t size = configFile.size();
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// Allocate a buffer to store contents of the file.
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std::unique_ptr<char[]> buf(new char[size]);
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configFile.readBytes(buf.get(), size);
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const size_t capacity = JSON_OBJECT_SIZE(3) + 440; // https://arduinojson.org/v6/assistant/
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DynamicJsonDocument jsonBuffer(capacity);
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auto error = deserializeJson(jsonBuffer, buf.get());
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if (error) {
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Serial.print(F("deserializeJson() failed with code "));
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Serial.println(error.c_str());
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return;
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} else {
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Serial.println(F("deserializeJson() successful:"));
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serializeJsonPretty(jsonBuffer, Serial);
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Serial.println();
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String m0 = jsonBuffer["displayedMessage"];
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displayedMessage = m0;
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String m1 = jsonBuffer["spaceAPIEndpoint"];
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spaceAPIEndpoint = m1;
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}
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configFile.close();
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}
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}
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} else {
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Serial.println(F("failed to mount FS"));
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}
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//end read
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// The extra parameters to be configured (can be either global or just in the setup)
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// After connecting, parameter.getValue() will get you the configured value
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// id/name placeholder/prompt default length
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WiFiManagerParameter customDisplayedMessage("Displayed message", "Displayed message", displayedMessage.c_str(), 50);
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WiFiManagerParameter customSpaceAPIEndpoint("SpaceAPI endpoint", "SpaceAPI endpoint", spaceAPIEndpoint.c_str(), 200);
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//WiFiManager
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//Local intialization. Once its business is done, there is no need to keep it around
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//WiFiManager wifiManager;
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//reset settings - for testing
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//wifiManager.resetSettings();
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//set callback that gets called when connecting to previous WiFi fails, and enters Access Point mode (for status LED)
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wifiManager.setAPCallback(configModeCallback);
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//set config save check callback
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wifiManager.setSaveConfigCallback(saveConfigCallback);
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//set static ip
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// wifiManager.setSTAStaticIPConfig(IPAddress(10,0,1,99), IPAddress(10,0,1,1), IPAddress(255,255,255,0));
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//add all your parameters here
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wifiManager.addParameter(&customDisplayedMessage);
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wifiManager.addParameter(&customSpaceAPIEndpoint);
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//reset settings - for testing
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//wifiManager.resetSettings();
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//sets timeout until configuration portal gets turned off
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//useful to make it all retry or go to sleep
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//in seconds
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//wifiManager.setTimeout(120);
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//fetches ssid and pass and tries to connect
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//if it does not connect it starts an access point with the specified name
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//here "SPACEAPI NOTIFIER"
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//and goes into a blocking loop awaiting configuration
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if (!wifiManager.autoConnect("SPACEAPI NOTIFIER")) {
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Serial.println(F("failed to connect and hit timeout"));
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delay(3000);
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//reset and try again, or maybe put it to deep sleep
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ESP.restart();
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delay(5000);
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}
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//if you get here you have connected to the WiFi
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Serial.println(F("connected...yeey :)"));
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ledTicker.detach();
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//keep LED on
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digitalWrite(LED_PIN, LOW);
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//read updated parameters
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displayedMessage = customDisplayedMessage.getValue();
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spaceAPIEndpoint = customSpaceAPIEndpoint.getValue();
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//save the custom parameters to FS
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if (shouldSaveConfig) {
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Serial.println(F("saving config"));
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const size_t capacity = JSON_OBJECT_SIZE(3) + 440; // https://arduinojson.org/v6/assistant/
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DynamicJsonDocument jsonBuffer(capacity);
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jsonBuffer["displayedMessage"] = displayedMessage;
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jsonBuffer["spaceAPIEndpoint"] = spaceAPIEndpoint;
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File configFile = SPIFFS.open("/config.json", "w");
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if (!configFile) {
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Serial.println(F("failed to open config file for writing"));
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}
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serializeJson(jsonBuffer, Serial);
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Serial.println();
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serializeJson(jsonBuffer, configFile);
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configFile.close();
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//end save
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}
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Serial.println(F("local ip:"));
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Serial.println(WiFi.localIP());
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Serial.println(WiFi.SSID());
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httpServer.on("/", handleRoot);
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httpServer.onNotFound(handleNotFound);
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httpServer.begin();
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Serial.println("HTTP server started");
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if (!MDNS.begin("spaceapi-notifier")) { // https://github.com/esp8266/Arduino/blob/14262af0d19a9a3b992d5aa310a684d47b6fb876/libraries/ESP8266mDNS/examples/mDNS_Web_Server/mDNS_Web_Server.ino
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Serial.println("Error setting up MDNS responder!");
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} else {
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Serial.println("mDNS responder started");
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}
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MDNS.addService("http", "tcp", 80);
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secureClient.setInsecure();
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P.begin();
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P.setIntensity(7); // yeah don't blind people
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}
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bool buttonState = HIGH;
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bool previousButtonState = HIGH;
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long previousMillis = 0;
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const long checkInterval = 5000;
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unsigned long pressedTime = millis();
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void loop() {
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MDNS.update();
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httpServer.handleClient();
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buttonState = digitalRead(BUTTON_PIN);
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if (buttonState == LOW && previousButtonState == HIGH) { // long press handling, reset settings https://forum.arduino.cc/index.php?topic=276789.msg1947963#msg1947963
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Serial.println("Button pressed (longpress handling)");
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pressedTime = millis();
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}
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if (buttonState == LOW && previousButtonState == LOW && (millis() - pressedTime) > 5000) {
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Serial.println("Button STILL pressed (longpress handling)");
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wifiManager.resetSettings();
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SPIFFS.format();
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delay(500);
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ESP.restart();
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}
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unsigned long currentMillis = millis();
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if (currentMillis - previousMillis > checkInterval) {
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previousMillis = currentMillis;
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spaceIsOpen = checkSpaceIsOpen();
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}
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if (P.displayAnimate()) {
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if (spaceIsOpen) {
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P.displayText(displayedMessage.c_str(), PA_CENTER, P.getSpeed(), P.getPause(), PA_NO_EFFECT, PA_NO_EFFECT);
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} else {
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P.displayText(".", PA_CENTER, P.getSpeed(), P.getPause(), PA_NO_EFFECT, PA_NO_EFFECT);
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}
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}
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previousButtonState = buttonState;
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}
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