initial commit

Author: magcode

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ]
+}

pics/display.jpg

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:nodemcuv2]
+platform = espressif8266
+board = nodemcuv2
+framework = arduino
+monitor_speed = 115200

pics/solder.jpg

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+#define wifiAP       ""
+#define wifiPassword ""
+#define mqtt_server  ""
+#define mqtt_port    1883

platformio.ini

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+#include <Arduino.h>
+#include <ArduinoJson.h>
+#include <U8g2lib.h>
+#include <ESP8266WiFi.h>
+#include <DNSServer.h>
+#include <WiFiManager.h>
+#include <PubSubClient.h>
+#include <Secrets.h>
+
+#define mqttTopicText "home/display1/text/set"
+
+U8G2_SSD1322_NHD_256X64_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/15, /* dc=*/4, /* reset=*/5);
+const int CHIP_ID = ESP.getChipId();
+WiFiClient wifiClient;
+PubSubClient mqttClient(wifiClient);
+
+void drawModeNormal(int tempInside, int tempOutside, const char *time, const char *data, int contrast)
+{
+  u8g2.firstPage();
+  u8g2.setContrast(contrast);
+  do
+  {
+    u8g2.setFont(u8g2_font_logisoso34_tf);
+    u8g2.setCursor(0, 34);
+    u8g2.print(tempInside);
+    u8g2.setFont(u8g2_font_logisoso16_tf);
+    u8g2.print("°C");
+
+    u8g2.setFont(u8g2_font_logisoso34_tf);
+    u8g2.setCursor(69, 34);
+    u8g2.print(tempOutside);
+    u8g2.setFont(u8g2_font_logisoso16_tf);
+    u8g2.print("°C");
+
+    u8g2.setFont(u8g2_font_logisoso38_tf);
+    u8g2.setCursor(142, 38);
+    u8g2.print(time);
+
+    u8g2.drawLine(0, 45, 255, 45);
+
+    u8g2.setFont(u8g2_font_8x13_t_symbols);
+    u8g2.drawUTF8(0, 62, data);
+  } while (u8g2.nextPage());
+}
+
+void loop(void)
+{
+  mqttClient.loop();
+}
+
+void logT(const char *s)
+{
+  Serial.println(s);
+  u8g2.firstPage();
+  do
+  {
+    u8g2.setFont(u8g2_font_luRS10_te);
+    u8g2.setCursor(0, 24);
+    u8g2.print(s);
+  } while (u8g2.nextPage());
+}
+
+void callback(char *topic, byte *payload, unsigned int length)
+{
+  Serial.print("Message arrived [");
+  Serial.print(topic);
+  Serial.print("] ");
+  for (unsigned int i = 0; i < length; i++)
+  {
+    Serial.print((char)payload[i]);
+  }
+  Serial.println();
+  StaticJsonDocument<256> doc;
+  deserializeJson(doc, payload, length);
+  const char *time = doc["time"];
+  const char *data = doc["data"];
+  int inside = doc["inside"];
+  int outside = doc["outside"];
+  int contrast = doc["contrast"];
+  bool disable = doc["disabled"];
+  if (!disable)
+  {
+    drawModeNormal(inside, outside, time, data, contrast);
+  }
+  else
+  {
+    u8g2.firstPage();
+    do
+    {
+    } while (u8g2.nextPage());
+  }
+}
+
+void startWifi(void)
+{
+  WiFi.begin(wifiAP, wifiPassword);
+  logT("Wifi connecting ...");
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    delay(500);
+    Serial.print(".");
+  }
+  logT("Wifi connected");
+}
+
+void startMqtt()
+{
+  mqttClient.setServer(mqtt_server, mqtt_port);
+  mqttClient.setCallback(callback);
+  while (!mqttClient.connected())
+  {
+    String clientId = "iotdisplay-";
+    clientId += String(random(0xffff), HEX);
+    Serial.printf("MQTT connecting as client %s...\n", clientId.c_str());
+    if (mqttClient.connect(clientId.c_str()))
+    {
+      logT("MQTT connected");
+      delay(1000);
+      mqttClient.subscribe(mqttTopicText);
+      logT("MQTT subscribed");
+    }
+    else
+    {
+      Serial.println("MQTT failed, retrying..." + mqttClient.state());
+      // Wait before retrying
+      delay(2500);
+    }
+  }
+}
+
+void setup(void)
+{
+  Serial.begin(115200);
+  Serial.println(CHIP_ID + " starting");
+
+  u8g2.begin();
+  u8g2.enableUTF8Print();
+
+  startWifi();
+  delay(1000);
+  startMqtt();
+  delay(1000);
+}