From 7a24f5d143df515addfa19e5b54d648bb9464307 Mon Sep 17 00:00:00 2001 From: Joe Tretter Date: Sat, 3 Oct 2020 13:49:53 -0500 Subject: [PATCH] Created MQTT controlled Display --- OledMQTTInfoDisplay/.gitignore | 5 + OledMQTTInfoDisplay/.vscode/extensions.json | 7 + OledMQTTInfoDisplay/include/README | 39 +++++ OledMQTTInfoDisplay/lib/README | 46 ++++++ OledMQTTInfoDisplay/platformio.ini | 20 +++ OledMQTTInfoDisplay/src/main.cpp | 151 ++++++++++++++++++++ OledMQTTInfoDisplay/test/README | 11 ++ 7 files changed, 279 insertions(+) create mode 100644 OledMQTTInfoDisplay/.gitignore create mode 100644 OledMQTTInfoDisplay/.vscode/extensions.json create mode 100644 OledMQTTInfoDisplay/include/README create mode 100644 OledMQTTInfoDisplay/lib/README create mode 100644 OledMQTTInfoDisplay/platformio.ini create mode 100644 OledMQTTInfoDisplay/src/main.cpp create mode 100644 OledMQTTInfoDisplay/test/README diff --git a/OledMQTTInfoDisplay/.gitignore b/OledMQTTInfoDisplay/.gitignore new file mode 100644 index 0000000..89cc49c --- /dev/null +++ b/OledMQTTInfoDisplay/.gitignore @@ -0,0 +1,5 @@ +.pio +.vscode/.browse.c_cpp.db* +.vscode/c_cpp_properties.json +.vscode/launch.json +.vscode/ipch diff --git a/OledMQTTInfoDisplay/.vscode/extensions.json b/OledMQTTInfoDisplay/.vscode/extensions.json new file mode 100644 index 0000000..0f0d740 --- /dev/null +++ b/OledMQTTInfoDisplay/.vscode/extensions.json @@ -0,0 +1,7 @@ +{ + // See http://go.microsoft.com/fwlink/?LinkId=827846 + // for the documentation about the extensions.json format + "recommendations": [ + "platformio.platformio-ide" + ] +} diff --git a/OledMQTTInfoDisplay/include/README b/OledMQTTInfoDisplay/include/README new file mode 100644 index 0000000..194dcd4 --- /dev/null +++ b/OledMQTTInfoDisplay/include/README @@ -0,0 +1,39 @@ + +This directory is intended for project header files. + +A header file is a file containing C declarations and macro definitions +to be shared between several project source files. You request the use of a +header file in your project source file (C, C++, etc) located in `src` folder +by including it, with the C preprocessing directive `#include'. + +```src/main.c + +#include "header.h" + +int main (void) +{ + ... +} +``` + +Including a header file produces the same results as copying the header file +into each source file that needs it. Such copying would be time-consuming +and error-prone. With a header file, the related declarations appear +in only one place. If they need to be changed, they can be changed in one +place, and programs that include the header file will automatically use the +new version when next recompiled. The header file eliminates the labor of +finding and changing all the copies as well as the risk that a failure to +find one copy will result in inconsistencies within a program. + +In C, the usual convention is to give header files names that end with `.h'. +It is most portable to use only letters, digits, dashes, and underscores in +header file names, and at most one dot. + +Read more about using header files in official GCC documentation: + +* Include Syntax +* Include Operation +* Once-Only Headers +* Computed Includes + +https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html diff --git a/OledMQTTInfoDisplay/lib/README b/OledMQTTInfoDisplay/lib/README new file mode 100644 index 0000000..6debab1 --- /dev/null +++ b/OledMQTTInfoDisplay/lib/README @@ -0,0 +1,46 @@ + +This directory is intended for project specific (private) libraries. +PlatformIO will compile them to static libraries and link into executable file. + +The source code of each library should be placed in a an own separate directory +("lib/your_library_name/[here are source files]"). + +For example, see a structure of the following two libraries `Foo` and `Bar`: + +|--lib +| | +| |--Bar +| | |--docs +| | |--examples +| | |--src +| | |- Bar.c +| | |- Bar.h +| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html +| | +| |--Foo +| | |- Foo.c +| | |- Foo.h +| | +| |- README --> THIS FILE +| +|- platformio.ini +|--src + |- main.c + +and a contents of `src/main.c`: +``` +#include +#include + +int main (void) +{ + ... +} + +``` + +PlatformIO Library Dependency Finder will find automatically dependent +libraries scanning project source files. + +More information about PlatformIO Library Dependency Finder +- https://docs.platformio.org/page/librarymanager/ldf.html diff --git a/OledMQTTInfoDisplay/platformio.ini b/OledMQTTInfoDisplay/platformio.ini new file mode 100644 index 0000000..012204a --- /dev/null +++ b/OledMQTTInfoDisplay/platformio.ini @@ -0,0 +1,20 @@ +; 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:esp32doit-devkit-v1] +platform = espressif32 +board = esp32doit-devkit-v1 +framework = arduino +lib_deps = + khoih-prog/ESP_WiFiManager@^1.1.2 + monstrenyatko/ArduinoMqtt@^1.5.1 + bblanchon/ArduinoJson@^6.16.1 + knolleary/PubSubClient@^2.8 + adafruit/Adafruit SSD1306@^2.4.0 \ No newline at end of file diff --git a/OledMQTTInfoDisplay/src/main.cpp b/OledMQTTInfoDisplay/src/main.cpp new file mode 100644 index 0000000..1911a18 --- /dev/null +++ b/OledMQTTInfoDisplay/src/main.cpp @@ -0,0 +1,151 @@ +/********* + Rui Santos + Complete project details at https://randomnerdtutorials.com +*********/ + +// I connected SCK to D22 and SDA to D21 - but all I get is a weird pattern - is the dislay broken? + +#include +#include +#include +#include +#include +#include +#include +#include + +#define SCREEN_WIDTH 128 // OLED display width, in pixels +#define SCREEN_HEIGHT 64 // OLED display height, in pixels + +// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) +Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); + +// Update these with values suitable for your network. + +const char* ssid = "Jnd-Front"; +const char* password = "Paris2016"; +const char* mqtt_server = "mqtt.ddns.kawomi.com"; + +WiFiClient espClient; +PubSubClient client(espClient); +unsigned long lastMsg = 0; +#define MSG_BUFFER_SIZE (50) +char msg[MSG_BUFFER_SIZE]; + +void setup_wifi() { + + delay(10); + // We start by connecting to a WiFi network + Serial.println(); + Serial.print("Connecting to "); + Serial.println(ssid); + + WiFi.mode(WIFI_STA); + WiFi.begin(ssid, password); + + while (WiFi.status() != WL_CONNECTED) { + delay(500); + Serial.print("."); + } + + randomSeed(micros()); + + Serial.println(""); + Serial.println("WiFi connected"); + Serial.println("IP address: "); + Serial.println(WiFi.localIP()); + + display.setCursor(0, 0); + display.clearDisplay(); + display.print("Wifi connected\nIP addres:\n"); + display.print(WiFi.localIP()); + display.display(); + delay(1000); +} + + +void reconnect() { + // Loop until we're reconnected + while (!client.connected()) { + Serial.print("Attempting MQTT connection..."); + // Create a random client ID + String clientId = "ESP32Client-"; + clientId += String(random(0xffff), HEX); + // Attempt to connect + if (client.connect(clientId.c_str())) { + Serial.println("MQTT connected"); + client.publish("OLED", "Connected"); + client.subscribe("OLED/setText"); + } else { + Serial.print("MQTT failed, rc="); + Serial.print(client.state()); + Serial.println(" try again in 5 seconds"); + // Wait 5 seconds before retrying + delay(5000); + } + } +} + +void callback(char* topic, byte* payload, unsigned int length) { + Serial.print("Message arrived ["); + Serial.print(topic); + + String recBuf=""; + Serial.print("] "); + for (int i = 0; i < length; i++) { + recBuf += (char)payload[i]; + } + Serial.println(recBuf); + + StaticJsonDocument<1024> jsonDoc; + deserializeJson(jsonDoc,recBuf); + const char* theText=jsonDoc["text"]; + int theSize=jsonDoc["size"]; + + display.setCursor(40, 0); + display.setTextSize(9); + display.print("#"); + display.display(); + delay(500); + + display.setCursor(0, 0); + display.setTextSize(theSize); + display.clearDisplay(); + display.print(theText); + display.display(); + +} + + +void setup() { + Serial.begin(115200); + + if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64 + Serial.println(F("SSD1306 allocation failed")); + for(;;); + } + delay(2000); + display.clearDisplay(); + display.display(); + + display.setTextSize(1); + display.setTextColor(WHITE); + display.setCursor(0, 0); + // Display static text + display.println("Line 1 -"); + display.println("Line 2 --"); + display.println("Line 3 ---"); + display.display(); + + setup_wifi(); + client.setServer(mqtt_server, 1883); + client.setCallback(callback); +} + +void loop() { + if (!client.connected()) { + reconnect(); + } + client.loop(); +} + diff --git a/OledMQTTInfoDisplay/test/README b/OledMQTTInfoDisplay/test/README new file mode 100644 index 0000000..b94d089 --- /dev/null +++ b/OledMQTTInfoDisplay/test/README @@ -0,0 +1,11 @@ + +This directory is intended for PlatformIO Unit Testing and project tests. + +Unit Testing is a software testing method by which individual units of +source code, sets of one or more MCU program modules together with associated +control data, usage procedures, and operating procedures, are tested to +determine whether they are fit for use. Unit testing finds problems early +in the development cycle. + +More information about PlatformIO Unit Testing: +- https://docs.platformio.org/page/plus/unit-testing.html