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Refactored nodemcu/statusclient

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- Fix init_wifi: removed `ESP8266WiFiMulti`; replaced with simple
  wifi ap connection
- Fix send_status: refactored return type into `bool`
- Fix send_status: optimized if-branch for calculation of `status` into
  array access
- Fix send_status: removed `client.connected()` => `client.connect(...)`
  is enough
- Fix: renamed `reed` into `read`
- Cleanup: changed int variables into uint8_t
- Cleanup: moved static data (`ca_certs`, `client_cert/key` into global
  data
- Style: changed typedef enum into scoped enum (enum class decl)
- Style: changed int const definitions into anonymous enum constants
- Style: reorderd headers alphabetically
This commit is contained in:
Ludwig Behm 2023-10-24 01:08:04 +02:00
parent c2fd6ec7b0
commit 78e31e52a1
Signed by untrusted user: l.behm
GPG key ID: D344835D63B89384
1 changed files with 72 additions and 82 deletions
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154
source/client/nodemcu/statusclient/statusclient.ino
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@ -1,31 +1,46 @@
/*
* file: statusclient.ino
* desc: This file is part of the Krautspace Doorstatus project. It's the
* main file for a client, who deals with the input from a reed sensor and
* main file for a client, who deals with the input from a read sensor and
* push these values to a server. The code is make to run on a NodeMCU with
* ESP8266 chip.
*/
#include <ESP8266WiFiMulti.h>
#include <WiFiClientSecure.h>
#include <time.h>
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include "config.h"
#include "certs.h"
#include "config.h"
#include "credentials.h"
const int LED_PIN = 16; // D0
const int REED_PIN = 5; // D1
// cpp23 utility
namespace cpp23 {
template <typename Enum>
constexpr std::underlying_type_t<Enum> to_underlying(Enum e) noexcept { return static_cast<std::underlying_type_t<Enum>>(e);}
}
typedef enum {
DOOR_CLOSED = 0,
DOOR_OPEN = 1
} door_state;
door_state current_door_state = DOOR_CLOSED;
// defining some constants
enum : int {
LED_PIN = 16, // D0
READ_PIN = 5 // D1
};
BearSSL::WiFiClientSecure client;
enum class door_state {
closed = 0,
open = 1
};
void blink_led(int blink_count, int delay_time) {
// defining some globals
static inline door_state current_door_state = door_state::closed;
constexpr static inline std::array<char const[2], 2> state_str {{"0", "1"}};
// initializing
static inline BearSSL::X509List const ca_certs { CA_CERTS };
static inline BearSSL::X509List const client_cert { CLIENT_CERT };
static inline BearSSL::PrivateKey const client_key { CLIENT_KEY };
void blink_led(uint8_t blink_count, uint8_t delay_time) {
/*
* zur ausgabe von meldungen blinkt die interne led.
* erfolgreichesmeldungen werden durch kurze blinkzeichen angezeigt,
@ -39,7 +54,7 @@ void blink_led(int blink_count, int delay_time) {
* param 1: integer
* param 2: integer
*/
for(int i=0; i!= blink_count; ++i) {
for (; blink_count; --blink_count) {
digitalWrite(LED_PIN, LOW);
delay(delay_time);
digitalWrite(LED_PIN, HIGH);
@ -53,58 +68,45 @@ void init_serial() {
*/
Serial.begin(BAUD_RATE);
Serial.setDebugOutput(DEBUG);
Serial.println();
Serial.println("[Srl] Serial interface initialized");
Serial.println("\n[Srl] Serial interface initialized");
}
void init_pins() {
/*
* set gpio for reed sensor and led
/*
* set gpio for read sensor and led
*/
pinMode(REED_PIN, INPUT_PULLUP);
pinMode(READ_PIN, INPUT_PULLUP);
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH);
Serial.println("[Pin] LED and REED initialized");
Serial.println("[Pin] LED and READ initialized");
}
void init_wifi() {
/*
* Creates the ssl context. Turns wifi off and than into
* access point mode.
* TODO: is 'turn of' needed!
*/
ESP8266WiFiMulti wifi;
WiFi.mode(WIFI_OFF);
WiFi.mode(WIFI_STA);
wifi.addAP(SSID_1, PSK_1);
wifi.addAP(SSID_2, NULL);
Serial.println("[Wifi] Wifi initialized");
wifi.run();
if (WiFi.status() == WL_CONNECTED) {
Serial.print("[Wif] Connected to ");
Serial.println(WiFi.SSID());
Serial.print("[Wifi] IP: ");
Serial.println(WiFi.localIP());
set_clock();
} else {
Serial.println("[Wifi] Error: Failed to connect");
WiFi.begin(SSID, PSK);
Serial.println("[WiFi] Wifi initialized");
while (WiFi.status() != WL_CONNECTED) {
Serial.println("[WiFi] Error: Failed to connect");
blink_led(3, 500);
}
}
Serial.printf("[WiFi] Connected to %s\n", WiFi.SSID());
Serial.print("[WiFi] IP: ");
Serial.println(WiFi.localIP());
set_clock();
}
door_state read_door_state() {
/*
* die initialisierung des reed-pin mit pullup bewirkt, daß am pin
* die initialisierung des read-pin mit pullup bewirkt, daß am pin
* 3,3 volt anliegen. die verbindung des pins mit GND sorgt dafür,
* daß die spannung "abfließen" kann. dadurch hat der pin dann den
* status 'low'.
* geschlossene tür -> reed geschlossen -> low
* geöffnete tür -> reed offen -> high
* geschlossene tür -> read geschlossen -> low
* geöffnete tür -> read offen -> high
*/
if (digitalRead(REED_PIN) == HIGH) {
return DOOR_OPEN;
}
return DOOR_CLOSED;
return (digitalRead(READ_PIN) == HIGH) ? door_state::open : door_state::closed;
}
void set_clock() {
@ -115,58 +117,45 @@ void set_clock() {
Serial.print("[Clock] Waiting for NTP time sync");
time_t now = time(nullptr);
while (now < 8 * 3600 * 2) {
for (; now < 16 * 3600; now = time(nullptr)) { // 16 hours
delay(500);
Serial.print(".");
now = time(nullptr);
}
Serial.println("");
struct tm timeinfo;
gmtime_r(&now, &timeinfo);
Serial.print("[Clock] Current time: ");
Serial.println(asctime(&timeinfo));
Serial.printf("[Clock] Current time: %s\n", asctime(&timeinfo));
}
int send_status(door_state state) {
bool send_status(door_state state) {
/*
* Inits wifi (if needed) and send the status
*/
char status[2] = "";
char const* const status = state_str[cpp23::to_underlying(state)];
if (state == DOOR_CLOSED) {
strncpy(status, "0", 1);
} else if (state == DOOR_OPEN) {
strncpy(status, "1", 1);
} else {
return 1;
}
BearSSL::X509List server_cert(SERVER_CERT);
BearSSL::X509List client_cert(CLIENT_CERT);
BearSSL::PrivateKey client_key(CLIENT_KEY);
client.setTrustAnchors(&server_cert);
BearSSL::WiFiClientSecure client;
client.setTrustAnchors(&ca_certs);
client.setClientRSACert(&client_cert, &client_key);
Serial.println("[Ctx] SSL Context initialized");
Serial.printf("[Send] Connect to %s:%i\n", SERVER_URL, SERVER_PORT);
client.connect(SERVER_URL, SERVER_PORT);
if (!client.connected()) {
if (!client.connect(SERVER_URL, SERVER_PORT)) {
Serial.println("[Send] Can't connect to server");
Serial.print("[Send] SSL Error: ");
Serial.println(client.getLastSSLError());
client.stop();
return 1;
} else {
ESP.resetFreeContStack();
uint32_t freeStackStart = ESP.getFreeContStack();
Serial.println("[Send] Connection successful established");
Serial.printf("[Send] Send status: %s\n", status);
client.write(status);
Serial.printf("[Send] SSL Error: %d\n", client.getLastSSLError());
client.stop();
return false;
}
return 0;
}
// ESP.resetFreeContStack();
// uint32_t freeStackStart = ESP.getFreeContStack();
Serial.println("[Send] Connection successful established");
Serial.printf("[Send] Send status: %s\n", status);
client.write(status);
client.stop();
return true;
}
void setup() {
@ -187,12 +176,13 @@ void loop() {
if (new_door_state != current_door_state) {
Serial.printf("[Loop] Status has changed to %i\n", new_door_state);
blink_led(2, 100);
if (send_status(new_door_state) == 0) {
if (send_status(new_door_state)) {
current_door_state = new_door_state;
blink_led(5, 100);
} else {
blink_led(5, 500);
}
}
delay(FREQUENCY);
}