forked from Krautspace/doorstatus
clientprogramme in eigenes verzeichnis verschoben
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36
source/client/nodemcu/statusclient/certs.template
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36
source/client/nodemcu/statusclient/certs.template
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/*
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* file: certs.template
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* desc: This file is part of the Krautspace Doorstatus project. It contains
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* certificates for the statusclient.ino programm, that runs on a NodeMCU
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* with a ESP8266 chip.
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*
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* Replace the comments in certificate sections with our own certificates.
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*/
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const char SERVER_CERT[] PROGMEM = R"EOF(
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-----BEGIN CERTIFICATE-----
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/*
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* lace for the public server certificate to authenticate the doorstatus
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* server.
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*/
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-----END CERTIFICATE-----
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)EOF";
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const char CLIENT_CERT[] PROGMEM = R"EOF(
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-----BEGIN CERTIFICATE-----
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/*
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* Place for the clients (this program) public certificate to authenticate
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* client against the server.
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*/
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-----END CERTIFICATE-----
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)EOF";
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const char CLIENT_KEY[] PROGMEM = R"EOF(
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-----BEGIN CERTIFICATE-----
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/*
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* Place for the clients private key file.
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*/
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-----END CERTIFICATE-----
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)EOF";
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18
source/client/nodemcu/statusclient/config.h
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source/client/nodemcu/statusclient/config.h
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/*
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* file: config.h
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*/
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/* endpoint */
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#define SERVER_URL "status.kraut.space"
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#define SERVER_PORT 10001
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/* serial interface settings */
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#define BAUD_RATE 115200
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#define DEBUG true
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/* frequence to read the pin */
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#define FREQUENCY 5000
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/* time server settings */
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#define NTP_URL "pool.ntp.org"
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#define TZ_STRING "CET-1CDT,M3.5.0,M10.5.0/3"
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17
source/client/nodemcu/statusclient/credentials.template
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source/client/nodemcu/statusclient/credentials.template
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/*
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* file: credentials.template
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* desc: This file is part of the Krautspace Doorstatus project. It contains
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* wifi ssid and passwords for the statusclient.ino programm, that runs on a
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* NodeMCU with a ESP8266 chip.
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*
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* Rename this file into 'credentials.h' and adapt the values to your
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* wifi conditions.
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*/
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/* wifi credentials */
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#define SSID_1 "your_first__wlan_ssid"
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#define PSK_1 "your_first_wlan_passwort"
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#define SSID_2 "your_second_wlan_ssid"
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#define PSK_2 "your_seconde_wlan_password"
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#define SSID_3 "your_third_wlan_ssid"
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#define PSK_3 "your_third_wlan_password"
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198
source/client/nodemcu/statusclient/statusclient.ino
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source/client/nodemcu/statusclient/statusclient.ino
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/*
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* file: statusclient.ino
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* desc: This file is part of the Krautspace Doorstatus project. It's the
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* main file for a client, who deals with the input from a reed sensor and
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* push these values to a server. The code is make to run on a NodeMCU with
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* ESP8266 chip.
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*/
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#include <ESP8266WiFiMulti.h>
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#include <WiFiClientSecure.h>
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#include <time.h>
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#include "config.h"
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#include "certs.h"
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#include "credentials.h"
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const int LED_PIN = 16; // D0
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const int REED_PIN = 5; // D1
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typedef enum {
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DOOR_CLOSED = 0,
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DOOR_OPEN = 1
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} door_state;
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door_state current_door_state = DOOR_CLOSED;
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BearSSL::WiFiClientSecure client;
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void blink_led(int blink_count, int delay_time) {
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/*
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* zur ausgabe von meldungen blinkt die interne led.
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* erfolgreichesmeldungen werden durch kurze blinkzeichen angezeigt,
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* fehlermeldungen sind durch eine lange sequenz gekennzeichnet.
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* Signale:
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* status der tür hat sich geändert: 2x kurz
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* änderung erfolgreich gesendet: 5x kurz
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* es konnte keine wifi aufgebaut werden: 3x lang
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* senden des status fehlgeschlagen: 5x lang
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*
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* param 1: integer
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* param 2: integer
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*/
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for(int i=0; i!= blink_count; ++i) {
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digitalWrite(LED_PIN, LOW);
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delay(delay_time);
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digitalWrite(LED_PIN, HIGH);
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delay(delay_time);
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}
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}
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void init_serial() {
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/*
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* set baudrate and debug modus
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*/
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Serial.begin(BAUD_RATE);
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Serial.setDebugOutput(DEBUG);
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Serial.println();
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Serial.println("[Srl] Serial interface initialized");
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}
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void init_pins() {
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/*
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* set gpio for reed sensor and led
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*/
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pinMode(REED_PIN, INPUT_PULLUP);
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pinMode(LED_PIN, OUTPUT);
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digitalWrite(LED_PIN, HIGH);
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Serial.println("[Pin] LED and REED initialized");
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}
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void init_wifi() {
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/*
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* Creates the ssl context. Turns wifi off and than into
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* access point mode.
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* TODO: is 'turn of' needed!
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*/
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ESP8266WiFiMulti wifi;
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WiFi.mode(WIFI_OFF);
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WiFi.mode(WIFI_STA);
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wifi.addAP(SSID_1, PSK_1);
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wifi.addAP(SSID_2, NULL);
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Serial.println("[Wifi] Wifi initialized");
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wifi.run();
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if (WiFi.status() == WL_CONNECTED) {
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Serial.print("[Wif] Connected to ");
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Serial.println(WiFi.SSID());
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Serial.print("[Wifi] IP: ");
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Serial.println(WiFi.localIP());
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set_clock();
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} else {
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Serial.println("[Wifi] Error: Failed to connect");
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blink_led(3, 500);
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}
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}
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door_state read_door_state() {
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/*
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* die initialisierung des reed-pin mit pullup bewirkt, daß am pin
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* 3,3 volt anliegen. die verbindung des pins mit GND sorgt dafür,
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* daß die spannung "abfließen" kann. dadurch hat der pin dann den
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* status 'low'.
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* geschlossene tür -> reed geschlossen -> low
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* geöffnete tür -> reed offen -> high
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*/
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if (digitalRead(REED_PIN) == HIGH) {
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return DOOR_OPEN;
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}
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return DOOR_CLOSED;
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}
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void set_clock() {
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/*
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* We need time for certificate authorization
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*/
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configTime(TZ_STRING, NTP_URL);
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Serial.print("[Clock] Waiting for NTP time sync");
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time_t now = time(nullptr);
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while (now < 8 * 3600 * 2) {
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delay(500);
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Serial.print(".");
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now = time(nullptr);
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}
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Serial.println("");
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struct tm timeinfo;
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gmtime_r(&now, &timeinfo);
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Serial.print("[Clock] Current time: ");
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Serial.println(asctime(&timeinfo));
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}
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int send_status(door_state state) {
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/*
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* Inits wifi (if needed) and send the status
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*/
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char status[2] = "";
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if (state == DOOR_CLOSED) {
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strncpy(status, "0", 1);
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} else if (state == DOOR_OPEN) {
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strncpy(status, "1", 1);
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} else {
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return 1;
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}
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BearSSL::X509List server_cert(SERVER_CERT);
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BearSSL::X509List client_cert(CLIENT_CERT);
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BearSSL::PrivateKey client_key(CLIENT_KEY);
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client.setTrustAnchors(&server_cert);
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client.setClientRSACert(&client_cert, &client_key);
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Serial.println("[Ctx] SSL Context initialized");
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Serial.printf("[Send] Connect to %s:%i\n", SERVER_URL, SERVER_PORT);
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client.connect(SERVER_URL, SERVER_PORT);
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if (!client.connected()) {
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Serial.println("[Send] Can't connect to server");
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Serial.print("[Send] SSL Error: ");
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Serial.println(client.getLastSSLError());
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client.stop();
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return 1;
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} else {
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ESP.resetFreeContStack();
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uint32_t freeStackStart = ESP.getFreeContStack();
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Serial.println("[Send] Connection successful established");
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Serial.printf("[Send] Send status: %s\n", status);
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client.write(status);
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client.stop();
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}
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return 0;
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}
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void setup() {
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/*
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* things to do once at boot time
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*/
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init_serial();
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init_pins();
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init_wifi();
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}
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void loop() {
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/*
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* things are running in a endless loop
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*/
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door_state new_door_state = read_door_state();
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if (new_door_state != current_door_state) {
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Serial.printf("[Loop] Status has changed to %i\n", new_door_state);
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blink_led(2, 100);
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if (send_status(new_door_state) == 0) {
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current_door_state = new_door_state;
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blink_led(5, 100);
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} else {
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blink_led(5, 500);
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}
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}
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delay(FREQUENCY);
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}
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