Init

FabLock/.gitignore

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

FabLock/.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"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

FabLock/.vscode/settings.json

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+{
+    "files.associations": {
+        "optional": "cpp",
+        "ostream": "cpp",
+        "system_error": "cpp",
+        "array": "cpp",
+        "functional": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp"
+    }
+}

FabLock/include/README

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+
+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

FabLock/lib/README

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+
+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 <Foo.h>
+#include <Bar.h>
+
+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

FabLock/platformio.ini

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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:esp12e]
+platform = espressif8266
+board = esp12e
+framework = arduino
+lib_deps = 
+	knolleary/PubSubClient@^2.8
+	adafruit/Adafruit MCP23017 Arduino Library@^2.1.0
+monitor_speed = 115200

FabLock/src/config_example.h

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+#define WLAN_SSID ""
+#define WLAN_PASS ""
+#define MQTT_BROKER ""
+#define FABLOCKID 1
+#define MPC_RELAIS_ADDR 0x02
+#define HAS_FEEDBACK 1
+#define MPC_FEEDBACK_ADDR 0x03

FabLock/src/main.cpp

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+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include <Adafruit_MCP23X17.h>
+
+#include "config.h"
+#define MCP_INPUTS 16 // MCP23017
+#define TRIGGER_TIME 1500
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+Adafruit_MCP23X17 mcp_relais;
+Adafruit_MCP23X17 mcp_feedback;
+
+unsigned long lastMsg = 0;
+#define MSG_BUFFER_SIZE	(50)
+char msg[MSG_BUFFER_SIZE];
+
+#define TOPIC_BUFFER_SIZE (50)
+char topic_recv[TOPIC_BUFFER_SIZE];
+char topic_send[TOPIC_BUFFER_SIZE];
+
+void setup_wifi() 
+{
+    delay(10);
+
+    Serial.println();
+    Serial.print("Connecting to ");
+    Serial.println(WLAN_SSID);
+
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(WLAN_SSID, WLAN_PASS);
+
+    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());
+}
+
+void callback(char* topic, byte* payload, unsigned int length)
+{
+    Serial.println("Receive message");
+
+    int topic_len = (int)strlen(topic);
+    int trigger_len = (int)strlen("/trigger");
+    int set_state_len = (int)strlen("/set_state");
+    if(strcmp(topic + topic_len - trigger_len, "/trigger"))
+    {
+        char str_id[4] = {0};
+        strncpy(str_id, topic  + topic_len - trigger_len - 3, 3);
+        int id = atoi(str_id);
+
+        if ((char)payload[0] == '1')
+        {
+            mcp_relais.digitalWrite(id, HIGH);
+            delay(TRIGGER_TIME);
+            mcp_relais.digitalWrite(id, LOW);
+        } 
+        else 
+        {
+            mcp_relais.digitalWrite(id, LOW);
+            delay(TRIGGER_TIME);
+            mcp_relais.digitalWrite(id, HIGH);
+        }
+    }
+
+    if(strcmp(topic + topic_len - set_state_len, "/set_state"))
+    {
+        char str_id[4] = {0};
+        strncpy(str_id, topic  + topic_len - trigger_len - 3, 3);
+        int id = atoi(str_id);
+
+        if ((char)payload[0] == '1')
+        {
+            mcp_relais.digitalWrite(id, HIGH);
+        } 
+        else 
+        {
+            mcp_relais.digitalWrite(id, LOW);
+        }
+    }
+}
+
+void reconnect() 
+{
+    while (!client.connected()) 
+    {
+        Serial.print("Attempting MQTT connection...");
+        String clientId = "FABLOCK-";
+        clientId += String(random(0xffff), HEX);
+        if (client.connect(clientId.c_str())) 
+        {           
+            snprintf (topic_recv, TOPIC_BUFFER_SIZE, "fablock/%03d/+/trigger", FABLOCKID);
+            client.subscribe(topic_recv);
+            snprintf (topic_recv, TOPIC_BUFFER_SIZE, "fablock/%03d/+/set_state", FABLOCKID);
+            client.subscribe(topic_recv);
+        }
+        else
+        {
+            Serial.print("failed, rc=");
+            Serial.print(client.state());
+            Serial.println(" try again in 5 seconds");
+            delay(5000);
+        }
+    }
+}
+
+void setup() 
+{
+    int i = 0;
+
+    pinMode(BUILTIN_LED, OUTPUT);
+    Serial.begin(115200);
+    setup_wifi();
+
+    client.setServer(MQTT_BROKER, 1883);
+    client.setCallback(callback);
+
+    if (!mcp_relais.begin_I2C(MPC_RELAIS_ADDR)) 
+    {
+        Serial.println("Error.");
+        while (1);
+    }
+    for(i = 0; i++; i<MCP_INPUTS)
+    {
+        mcp_feedback.pinMode(i, OUTPUT);
+    }
+
+    if(HAS_FEEDBACK)
+    {
+        if (!mcp_feedback.begin_I2C(MPC_FEEDBACK_ADDR)) 
+        {
+            Serial.println("Error.");
+            while (1);
+        }
+        for(i = 0; i++; i<MCP_INPUTS)
+        {
+            mcp_feedback.pinMode(i, INPUT_PULLUP);
+        }
+    }
+}
+
+void loop()
+{
+    if (!client.connected())
+    {
+        reconnect();
+    }
+    client.loop();
+
+    unsigned long now = millis();
+    if (now - lastMsg > 30000) 
+    {
+        lastMsg = now;
+        int value;
+
+        Serial.print("Publish State and Feedback");
+        for(int i = 0; i++; i<MCP_INPUTS)
+        {
+            value = mcp_relais.digitalRead(i);
+            snprintf (msg, MSG_BUFFER_SIZE, "%ld", value);
+            snprintf (topic_send, TOPIC_BUFFER_SIZE, "fablock/%03d/%03d/state", FABLOCKID, i);
+            client.publish(topic_send, msg);
+        }
+
+        if(HAS_FEEDBACK)
+        {
+            for(int i = 0; i++; i<MCP_INPUTS)
+            {
+                value = mcp_feedback.digitalRead(i);
+                snprintf (msg, MSG_BUFFER_SIZE, "%ld", value);
+                snprintf (topic_send, TOPIC_BUFFER_SIZE, "fablock/%03d/%03d/feedback", FABLOCKID, i);
+                client.publish(topic_send, msg);
+            }
+        }
+    }
+}

FabLock/test/README

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+
+This directory is intended for PlatformIO Test Runner 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/en/latest/advanced/unit-testing/index.html