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Fork of the espurna firmware for `mhsw` switches
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mhsw-espurna/src/code.ino

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/*
ITead Sonoff Custom Firmware
Copyright (C) 2016 by Xose Pérez <xose dot perez at gmail dot com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <PubSubClient.h>
#include "FS.h"
// -----------------------------------------------------------------------------
// Configuració
// -----------------------------------------------------------------------------
#define DEBUG
#define BUTTON_PIN 0
#define RELAY_PIN 12
#define LED_PIN 13
#define DEBOUNCE_COUNTER_START 150
#define AP_PASS "fibonacci"
#define BUFFER_SIZE 1024
#define CONFIG_PATH "/.config"
#define WIFI_CONNECT_TIMEOUT 5000
#define WIFI_RECONNECT_DELAY 30000
#define MQTT_RECONNECT_DELAY 30000
#define NETWORK_BUFFER 3
// -----------------------------------------------------------------------------
// Globals
// -----------------------------------------------------------------------------
ESP8266WebServer server(80);
WiFiClient client;
PubSubClient mqtt(client);
bool relayOn = false;
char identifier[] = "SONOFF_0000";
bool identifierSet = false;
byte network = 0;
String config_ssid[NETWORK_BUFFER];
String config_pass[NETWORK_BUFFER];
String mqtt_server = "192.168.1.100";
String mqtt_topic = "/test/switch/{identifier}";
String mqtt_port = "1883";
char mqtt_subscribe_to[30];
char mqtt_publish_to[30];
// -----------------------------------------------------------------------------
// Relay
// -----------------------------------------------------------------------------
void switchRelayOn() {
#ifdef DEBUG
Serial.println("Turning the relay ON");
#endif
if (mqtt.connected()) {
mqtt.publish(mqtt_publish_to, "1");
}
digitalWrite(RELAY_PIN, HIGH);
digitalWrite(LED_PIN, HIGH);
relayOn = true;
}
void switchRelayOff() {
#ifdef DEBUG
Serial.println("Turning the relay OFF");
#endif
if (mqtt.connected()) {
mqtt.publish(mqtt_publish_to, "0");
}
digitalWrite(RELAY_PIN, LOW);
digitalWrite(LED_PIN, LOW);
relayOn = false;
}
void toggleRelay() {
if (relayOn) {
switchRelayOff();
} else {
switchRelayOn();
}
}
// -----------------------------------------------------------------------------
// WebServer
// -----------------------------------------------------------------------------
String getContentType(String filename) {
if (server.hasArg("download")) return "application/octet-stream";
else if (filename.endsWith(".htm")) return "text/html";
else if (filename.endsWith(".html")) return "text/html";
else if (filename.endsWith(".css")) return "text/css";
else if (filename.endsWith(".js")) return "application/javascript";
else if (filename.endsWith(".png")) return "image/png";
else if (filename.endsWith(".gif")) return "image/gif";
else if (filename.endsWith(".jpg")) return "image/jpeg";
else if (filename.endsWith(".ico")) return "image/x-icon";
else if (filename.endsWith(".xml")) return "text/xml";
else if (filename.endsWith(".pdf")) return "application/x-pdf";
else if (filename.endsWith(".zip")) return "application/x-zip";
else if (filename.endsWith(".gz")) return "application/x-gzip";
return "text/plain";
}
void handleRelayOn() {
#ifdef DEBUG
Serial.println("Request: /on");
#endif
switchRelayOn();
server.send(200, "text/plain", "ON");
}
void handleRelayOff() {
#ifdef DEBUG
Serial.println("Request: /off");
#endif
switchRelayOff();
server.send(200, "text/plain", "OFF");
}
bool handleFileRead(String path) {
#ifdef DEBUG
Serial.println("Request: " + path);
#endif
if (path.endsWith("/")) path += "index.html";
String contentType = getContentType(path);
String pathWithGz = path + ".gz";
if (SPIFFS.exists(pathWithGz)) path = pathWithGz;
if (SPIFFS.exists(path)) {
File file = SPIFFS.open(path, "r");
size_t sent = server.streamFile(file, contentType);
size_t contentLength = file.size();
file.close();
return true;
}
return false;
}
void handleHome() {
#ifdef DEBUG
Serial.println("Request: /index.html");
#endif
String filename = "/index.html";
String content = "";
char buffer[BUFFER_SIZE];
// Read file in chunks
File file = SPIFFS.open(filename, "r");
int size = file.size();
while (size > 0) {
size_t len = std::min(BUFFER_SIZE-1, size);
file.read((uint8_t *) buffer, len);
buffer[len] = 0;
content += buffer;
size -= len;
}
file.close();
// Replace placeholders
if (WiFi.status() == WL_CONNECTED) {
content.replace("{status}", "Client + Acces Point");
content.replace("{network}", config_ssid[network]);
content.replace("{ip}", WiFi.localIP().toString());
} else {
content.replace("{status}", "Acces Point");
content.replace("{network}", "");
content.replace("{ip}", "");
}
content.replace("{ssid0}", config_ssid[0]);
content.replace("{pass0}", config_pass[0]);
content.replace("{ssid1}", config_ssid[1]);
content.replace("{pass1}", config_pass[1]);
content.replace("{ssid2}", config_ssid[2]);
content.replace("{pass2}", config_pass[2]);
content.replace("{mqtt_server}", mqtt_server);
content.replace("{mqtt_port}", mqtt_port);
content.replace("{mqtt_topic}", mqtt_topic);
// Serve content
String contentType = getContentType(filename);
server.send(200, contentType, content);
}
void handleSave() {
#ifdef DEBUG
Serial.println("Request: /save");
#endif
config_ssid[0] = server.arg("ssid0");
config_pass[0] = server.arg("pass0");
config_ssid[1] = server.arg("ssid1");
config_pass[1] = server.arg("pass1");
config_ssid[2] = server.arg("ssid2");
config_pass[2] = server.arg("pass2");
mqtt_server = server.arg("mqtt_server");
mqtt_port = server.arg("mqtt_port");
mqtt_topic = server.arg("mqtt_topic");
saveConfig();
network = 0;
wifiSetup();
delay(100);
String output = "{";
output += "\"status\": \"";
if (WiFi.status() == WL_CONNECTED) {
output += "Client + Acces Point";
} else {
output += "Acces Point";
}
output += "\", \"ip\": \"";
if (WiFi.status() == WL_CONNECTED) {
output += WiFi.localIP().toString();
}
output += "\" }";
server.send(200, "text/json", output);
}
void webServerSetup() {
// Relay control
server.on("/on", HTTP_GET, handleRelayOn);
server.on("/off", HTTP_GET, handleRelayOff);
// Configuration page
server.on("/save", HTTP_POST, handleSave);
server.on("/", HTTP_GET, handleHome);
server.on("/index.html", HTTP_GET, handleHome);
// Anything else
server.onNotFound([]() {
// Hidden files
if (server.uri().startsWith("/.")) {
server.send(403, "text/plain", "Forbidden");
return;
}
// Existing files in SPIFFS
if (!handleFileRead(server.uri())) {
server.send(404, "text/plain", "NotFound");
return;
}
});
// Run server
server.begin();
}
void webServerLoop() {
server.handleClient();
}
// -----------------------------------------------------------------------------
// Wifi modes
// -----------------------------------------------------------------------------
char * getIdentifier() {
if (!identifierSet) {
uint8_t mac[WL_MAC_ADDR_LENGTH];
WiFi.softAPmacAddress(mac);
String macID = String(mac[WL_MAC_ADDR_LENGTH - 2], HEX) + String(mac[WL_MAC_ADDR_LENGTH - 1], HEX);
macID.toUpperCase();
for (byte i=0; i<4; i++) {
identifier[7+i] = macID.charAt(i);
}
identifierSet = true;
}
return identifier;
}
void wifiSetup() {
// Disconnect MQTT
if (mqtt.connected()) mqtt.disconnect();
// STA mode
WiFi.mode(WIFI_AP_STA);
if (config_ssid[network].length() > 0) {
char ssid[config_ssid[network].length()+1];
char pass[config_pass[network].length()+1];
config_ssid[network].toCharArray(ssid, config_ssid[network].length()+1);
config_pass[network].toCharArray(pass, config_pass[network].length()+1);
WiFi.begin(ssid, pass);
#ifdef DEBUG
Serial.println("Connecting to WIFI " + config_ssid[network]);
#endif
// Wait
unsigned long timeout = millis() + WIFI_CONNECT_TIMEOUT;
while (timeout > millis()) {
if (WiFi.status() == WL_CONNECTED) break;
delay(100);
}
#ifdef DEBUG
Serial.print("STA Mode: ");
Serial.print(config_ssid[network]);
Serial.print("/");
Serial.print(config_pass[network]);
Serial.print(", IP address: ");
#endif
if (WiFi.status() == WL_CONNECTED) {
#ifdef DEBUG
Serial.println(WiFi.localIP());
#endif
} else {
network = (network + 1) % NETWORK_BUFFER;
#ifdef DEBUG
Serial.println("NOT CONNECTED");
#endif
}
}
if (WiFi.status() != WL_CONNECTED) WiFi.mode(WIFI_AP);
WiFi.softAP(getIdentifier(), AP_PASS);
#ifdef DEBUG
Serial.print("AP Mode: ");
Serial.print(getIdentifier());
Serial.print("/");
Serial.print(AP_PASS);
Serial.print(", IP address: ");
Serial.println(WiFi.softAPIP());
#endif
}
void wifiLoop() {
static unsigned long timeout = millis();
if (WiFi.status() != WL_CONNECTED) {
if (timeout < millis()) {
wifiSetup();
timeout = millis() + WIFI_RECONNECT_DELAY;
}
}
}
// -----------------------------------------------------------------------------
// MQTT
// -----------------------------------------------------------------------------
void buildTopics() {
// Replace identifier
String base = mqtt_topic;
base.replace("{identifier}", getIdentifier());
// Get publish topic
base.toCharArray(mqtt_publish_to, base.length()+1);
mqtt_publish_to[base.length()+1] = 0;
// Get subscribe topic
String subscribe = base + "/set";
subscribe.toCharArray(mqtt_subscribe_to, subscribe.length()+1);
mqtt_subscribe_to[subscribe.length()+1] = 0;
}
void mqttCallback(char* topic, byte* payload, unsigned int length) {
#ifdef DEBUG
Serial.print("MQTT message ");
Serial.print(topic);
Serial.print(" => ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
#endif
if ((char)payload[0] == '1') {
switchRelayOn();
} else {
switchRelayOff();
}
}
void mqttConnect() {
if (!mqtt.connected()) {
char buffer[mqtt_server.length()+1];
mqtt_server.toCharArray(buffer, mqtt_server.length()+1);
mqtt.setServer(buffer, mqtt_port.toInt());
#ifdef DEBUG
Serial.print("Connecting to MQTT broker: ");
#endif
if (mqtt.connect(getIdentifier())) {
buildTopics();
#ifdef DEBUG
Serial.println("connected!");
Serial.print("Subscribing to ");
Serial.println(mqtt_subscribe_to);
#endif
mqtt.subscribe(mqtt_subscribe_to);
} else {
#ifdef DEBUG
Serial.print("failed, rc=");
Serial.println(mqtt.state());
#endif
}
}
}
void mqttSetup() {
mqtt.setCallback(mqttCallback);
}
void mqttLoop() {
static unsigned long timeout = millis();
if (WiFi.status() == WL_CONNECTED) {
if (!mqtt.connected()) {
if (timeout < millis()) {
mqttConnect();
timeout = millis() + MQTT_RECONNECT_DELAY;
}
}
if (mqtt.connected()) mqtt.loop();
}
}
// -----------------------------------------------------------------------------
// Configuration
// -----------------------------------------------------------------------------
bool saveConfig() {
File file = SPIFFS.open(CONFIG_PATH, "w");
if (file) {
file.println("ssid0=" + config_ssid[0]);
file.println("pass0=" + config_pass[0]);
file.println("ssid1=" + config_ssid[1]);
file.println("pass1=" + config_pass[1]);
file.println("ssid2=" + config_ssid[2]);
file.println("pass2=" + config_pass[2]);
file.println("mqtt_server=" + mqtt_server);
file.println("mqtt_port=" + mqtt_port);
file.println("mqtt_topic=" + mqtt_topic);
file.close();
return true;
}
return false;
}
bool loadConfig() {
if (SPIFFS.exists(CONFIG_PATH)) {
#ifdef DEBUG
Serial.println("Reading config file");
#endif
// Read contents
File file = SPIFFS.open(CONFIG_PATH, "r");
String content = file.readString();
file.close();
// Parse contents
content.replace("\r\n", "\n");
content.replace("\r", "\n");
int start = 0;
int end = content.indexOf("\n", start);
while (end > 0) {
String line = content.substring(start, end);
#ifdef DEBUG
Serial.println(line);
#endif
if (line.startsWith("ssid0=")) config_ssid[0] = line.substring(6);
else if (line.startsWith("pass0=")) config_pass[0] = line.substring(6);
else if (line.startsWith("ssid1=")) config_ssid[1] = line.substring(6);
else if (line.startsWith("pass1=")) config_pass[1] = line.substring(6);
else if (line.startsWith("ssid2=")) config_ssid[2] = line.substring(6);
else if (line.startsWith("pass2=")) config_pass[2] = line.substring(6);
else if (line.startsWith("mqtt_server=")) mqtt_server = line.substring(12);
else if (line.startsWith("mqtt_port=")) mqtt_port = line.substring(10);
else if (line.startsWith("mqtt_topic=")) mqtt_topic = line.substring(11);
if (end < 0) break;
start = end + 1;
end = content.indexOf("\n", start);
}
return true;
}
return false;
}
// -----------------------------------------------------------------------------
// Generic methods
// -----------------------------------------------------------------------------
void hardwareSetup() {
Serial.begin(115200);
pinMode(RELAY_PIN, OUTPUT);
pinMode(BUTTON_PIN, INPUT_PULLUP);
pinMode(LED_PIN, OUTPUT);
SPIFFS.begin();
}
void buttonLoop() {
static int lastButtonState = HIGH;
static int debounceCounter = 0;
if (debounceCounter > 0) {
if (debounceCounter == 1) {
int newButtonState = lastButtonState == HIGH ? LOW : HIGH;
if (newButtonState == LOW) {
toggleRelay();
}
lastButtonState = newButtonState;
}
debounceCounter--;
} else if (lastButtonState != digitalRead(BUTTON_PIN)) {
debounceCounter = DEBOUNCE_COUNTER_START;
}
}
// -----------------------------------------------------------------------------
// Booting
// -----------------------------------------------------------------------------
void setup() {
hardwareSetup();
delay(5000);
switchRelayOff();
loadConfig();
wifiSetup();
webServerSetup();
mqttSetup();
}
void loop() {
wifiLoop();
webServerLoop();
mqttLoop();
buttonLoop();
delay(1);
}