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#include <Arduino.h>
#include <WiFiManager.h>
#include <ESP8266WebServer.h>
#include <PubSubClient.h>
#include <ESP8266httpUpdate.h>
#include "secrets.h"
#define MQTT_BROKER "192.168.0.6"
#define MQTT_BROKER_PORT 1883
//#define MQTT_USERNAME ""
//#define MQTT_PASSWORD ""
#define MQTT_BASE "home/oekofen"
// fw update
// - increment number + build
// - scp .pio/build/$ENV/firmware.bin manuel@mausz.at:public_html/coding/.firmware/oekofen.bin
// - reboot device or send "fwupdate" to mqtt_topic_cmd
// - fw update state is published in mqtt_topic_state
#define FIRMWARE_VERSION 1
//#define FIRMWARE_URL ""
#define _STR(s) #s
#define STR(s) _STR(s)
const String mqtt_clientId = "OekoFen-" + String(ESP.getChipId())
+ "/v" + STR(FIRMWARE_VERSION);
const char* mqtt_topic_ping = MQTT_BASE "/ping";
const char* mqtt_topic_cmd = MQTT_BASE "/command";
const String mqtt_topic_state = String(MQTT_BASE) + "/" + String(ESP.getChipId());
bool mqttLoop();
void mqttCallback(char *topic, byte *payload, unsigned int length);
void checkFirmwareUpdate();
WiFiClient wifi_client;
PubSubClient mqtt(wifi_client);
ESP8266WebServer http_service(80);
void setup() {
Serial.begin(115200);
analogWriteFreq(8000);
pinMode(D3, OUTPUT);
pinMode(LED_BUILTIN, OUTPUT);
WiFiManager wifiManager;
wifiManager.setConfigPortalTimeout(600);
Serial.printf_P(PSTR("Setting up WiFi\n"));
WiFi.hostname("oekofen");
if (!wifiManager.autoConnect("oekofen-thermo"))
{
Serial.printf_P(PSTR("Failed to connect and hit timeout\n"));
delay(5000);
ESP.restart();
}
yield();
checkFirmwareUpdate();
yield();
mqtt.setServer(MQTT_BROKER, MQTT_BROKER_PORT);
mqtt.setCallback(mqttCallback);
http_service.on("/", HTTP_GET, []() {
http_service.send_P(200, PSTR("text/plain"), PSTR("I'm an oekofen fake thermostat"));
});
http_service.on("/set", HTTP_POST, []() {
if (!http_service.hasArg("value")) {
http_service.send_P(400, PSTR("text/plain"), PSTR("Bad Request"));
return;
}
int val = http_service.arg("value").toInt();
int pwm_val = constrain(val, 0, 1023);
analogWrite(D3, pwm_val);
http_service.send(200, "text/plain", String(pwm_val));
});
http_service.begin();
Serial.println("Setup done");
}
bool mqttLoop()
{
if (!mqtt.connected())
{
Serial.printf_P(PSTR("Connecting to MQTT\n"));
if (!mqtt.connect(mqtt_clientId.c_str(), MQTT_USERNAME, MQTT_PASSWORD))
return false;
Serial.printf_P(PSTR("MQTT connected\n"));
mqtt.publish(mqtt_topic_ping, mqtt_clientId.c_str());
mqtt.subscribe(mqtt_topic_ping);
mqtt.subscribe(mqtt_topic_cmd);
}
yield();
mqtt.loop();
return true;
}
void mqttCallback(char *topic, byte *payload, unsigned int length)
{
char c_payload[length + 1];
memcpy(c_payload, payload, length);
c_payload[length] = '\0';
if (!strcmp(topic, mqtt_topic_ping))
{
if (!strcmp(c_payload, "ping"))
mqtt.publish(mqtt_topic_ping, mqtt_clientId.c_str());
return;
}
else if (!strcmp(topic, mqtt_topic_cmd))
{
if (!strcmp(c_payload, "TODO"))
{
return;
}
else if (!strcmp(c_payload, "fwupdate"))
{
checkFirmwareUpdate();
return;
}
else if (!strcmp(c_payload, "reset"))
{
Serial.printf_P(PSTR("Resetting\n"));
ESP.reset();
return;
}
}
Serial.printf_P(PSTR("Unhandled MQTT message: [%s] %s\n"), topic, c_payload);
}
void checkFirmwareUpdate()
{
BearSSL::WiFiClientSecure update_client;
update_client.setInsecure();
mqtt.publish(mqtt_topic_state.c_str(), "fwupdate running");
ESPhttpUpdate.setLedPin(LED_BUILTIN, HIGH);
ESPhttpUpdate.rebootOnUpdate(true);
t_httpUpdate_return ret = ESPhttpUpdate.update(update_client, FIRMWARE_URL, STR(FIRMWARE_VERSION));
switch(ret)
{
case HTTP_UPDATE_FAILED:
{
Serial.printf_P(PSTR("HTTP_UPDATE_FAILED Error (%d): %s\n"),
ESPhttpUpdate.getLastError(), ESPhttpUpdate.getLastErrorString().c_str());
String tmp = String("fwupdate error: ") + ESPhttpUpdate.getLastErrorString();
mqtt.publish(mqtt_topic_state.c_str(), tmp.c_str());
}
break;
case HTTP_UPDATE_NO_UPDATES:
Serial.printf_P(PSTR("HTTP_UPDATE_NO_UPDATES\n"));
mqtt.publish(mqtt_topic_state.c_str(), "fwupdate noupdates");
break;
case HTTP_UPDATE_OK:
Serial.printf_P(PSTR("HTTP_UPDATE_OK\n"));
mqtt.publish(mqtt_topic_state.c_str(), "fwupdate ok");
break;
}
}
void loop() {
http_service.handleClient();
if (!mqttLoop())
delay(5000);
}
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