Initial commit

door-detector-arduino/checkMAC.ino

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+/*
+  Rui Santos & Sara Santos - Random Nerd Tutorials
+  Complete project details at https://RandomNerdTutorials.com/get-change-esp32-esp8266-mac-address-arduino/
+  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files.  
+  The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+*/
+#include <WiFi.h>
+#include <esp_wifi.h>
+
+void readMacAddress(){
+  uint8_t baseMac[6];
+  esp_err_t ret = esp_wifi_get_mac(WIFI_IF_STA, baseMac);
+  if (ret == ESP_OK) {
+    Serial.printf("%02x:%02x:%02x:%02x:%02x:%02x\n",
+                  baseMac[0], baseMac[1], baseMac[2],
+                  baseMac[3], baseMac[4], baseMac[5]);
+  } else {
+    Serial.println("Failed to read MAC address");
+  }
+}
+
+void setup(){
+  pinMode(8, OUTPUT);
+  Serial.begin(115200);
+
+  WiFi.mode(WIFI_STA);
+  WiFi.STA.begin();
+
+  Serial.print("[DEFAULT] ESP32 Board MAC Address: ");
+  readMacAddress();
+}
+ 
+void loop(){
+  digitalWrite(8, 1);
+  delay(250);
+  digitalWrite(8, 0);
+  delay(250);
+  Serial.print("[DEFAULT] ESP32 Board MAC Address: ");
+  readMacAddress();
+}
+

door-detector-arduino/door-detector-arduino.ino

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+// const int sensorPin = 2;
+// bool sensorState = false;
+//
+// void setup() {
+//   pinMode(sensorPin, INPUT);
+//   Serial.begin(115200);
+// }
+//
+// void loop() {
+//   sensorState = digitalRead(sensorPin);
+//   if (sensorState) {
+//     Serial.println("Open");
+//   } else {
+//     Serial.println("Closed");
+//   }
+//   delay(500);
+// }

door-detector-receiver/.gitignore

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

door-detector-receiver/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // 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"
+    ]
+}

door-detector-receiver/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 convention is to give header files names that end with `.h'.
+
+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

door-detector-receiver/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 the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for 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
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

door-detector-receiver/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:esp32-c3-devkitm-1]
+platform = espressif32
+board = esp32-c3-devkitm-1
+framework = arduino
+monitor_speed = 115200
+debug_tool = cmsis-dap

door-detector-receiver/src/main.cpp

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+#include <esp_now.h>
+#include <WiFi.h>
+
+// Same as in the sender code, doesn't really matter; kept here for completeness
+typedef struct struct_message {
+    char a[32];
+} struct_message;
+
+struct_message myData;
+
+#define LEDPIN 4
+
+// callback function that will be executed when data is received
+void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
+  memcpy(&myData, incomingData, sizeof(myData));
+  Serial.print("Bytes received: ");
+  Serial.println(len);
+  Serial.println(myData.a);
+  digitalWrite(LEDPIN, 1);
+  delay(100);
+  digitalWrite(LEDPIN, 0);
+  delay(200);
+}
+ 
+void setup() {
+  pinMode(4, OUTPUT);
+
+  Serial.begin(115200);
+  
+  WiFi.mode(WIFI_STA);
+
+  // Init ESP-NOW
+  if (esp_now_init() != ESP_OK) {
+    Serial.println("Error initializing ESP-NOW");
+    return;
+  }
+  
+  esp_now_register_recv_cb(esp_now_recv_cb_t(OnDataRecv));
+
+  // Normal
+  digitalWrite(LEDPIN, 1);
+  delay(100);
+  digitalWrite(LEDPIN, 0);
+  delay(100);
+  // Long
+  digitalWrite(LEDPIN, 1);
+  delay(200);
+  digitalWrite(LEDPIN, 0);
+  delay(100);
+  // 2xShort
+  digitalWrite(LEDPIN, 1);
+  delay(50);
+  digitalWrite(LEDPIN, 0);
+  delay(50);
+  digitalWrite(LEDPIN, 1);
+  delay(50);
+  digitalWrite(LEDPIN, 0);
+  delay(50);
+}
+ 
+void loop() {
+  // stay silly :3
+}

door-detector-receiver/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

door-detector-sender/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

door-detector-sender/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // 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"
+    ]
+}

door-detector-sender/include/README

@@ -0,0 +1,37 @@
+
+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 convention is to give header files names that end with `.h'.
+
+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

door-detector-sender/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 the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for 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
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

door-detector-sender/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:esp32-c3-devkitm-1]
+platform = espressif32
+board = esp32-c3-devkitm-1
+framework = arduino
+monitor_speed = 115200
+debug_tool = cmsis-dap

door-detector-sender/src/main.cpp

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+#include <esp_now.h>
+#include <WiFi.h>
+
+// Receiver MAC Address
+uint8_t broadcastAddress[] = {0x34, 0xCD, 0xB0, 0xD0, 0x76, 0x40};
+
+// Data to send, dose not matter in this code as any data will make the receiver blink
+typedef struct struct_message {
+  char a[16];
+} struct_message;
+
+struct_message myData;
+
+esp_now_peer_info_t peerInfo;
+
+#define LEDPIN 0
+#define REEDSENSORPIN 4
+
+// callback when data is sent
+void OnDataSent(const uint8_t *mac_addr, esp_now_send_status_t status) {
+  Serial.print("\r\nLast Packet Send Status:\t");
+  Serial.println(status == ESP_NOW_SEND_SUCCESS ? "Delivery Success" : "Delivery Fail");
+}
+ 
+void setup() {
+  pinMode(REEDSENSORPIN, INPUT);
+  pinMode(LEDPIN, OUTPUT);
+
+  Serial.begin(115200);
+  Serial.println("Hello World!");
+ 
+  WiFi.mode(WIFI_STA);
+
+  // Init ESP-NOW
+  if (esp_now_init() != ESP_OK) {
+    Serial.println("Error initializing ESP-NOW");
+    return;
+  }
+
+  esp_now_register_send_cb(OnDataSent);
+  
+  // Register peer
+  memcpy(peerInfo.peer_addr, broadcastAddress, 6);
+  peerInfo.channel = 0;  
+  peerInfo.encrypt = false;
+  
+  // Add peer        
+  if (esp_now_add_peer(&peerInfo) != ESP_OK){
+    Serial.println("Failed to add peer");
+    return;
+  }
+
+  // 2xShort
+  digitalWrite(LEDPIN, 1);
+  delay(50);
+  digitalWrite(LEDPIN, 0);
+  delay(50);
+  digitalWrite(LEDPIN, 1);
+  delay(50);
+  digitalWrite(LEDPIN, 0);
+  delay(50);
+  // Long
+  digitalWrite(LEDPIN, 1);
+  delay(200);
+  digitalWrite(LEDPIN, 0);
+  delay(100);
+  // Normal
+  digitalWrite(LEDPIN, 1);
+  delay(100);
+  digitalWrite(LEDPIN, 0);
+  delay(100);
+}
+ 
+void loop() {
+  // Set values to send
+  strcpy(myData.a, "Heartbeat");
+  
+  if (!digitalRead(REEDSENSORPIN)) {
+    digitalWrite(LEDPIN, 1);
+    esp_err_t result = esp_now_send(broadcastAddress, (uint8_t *) &myData, sizeof(myData));
+    if (result == ESP_OK) {
+      Serial.println("Sent with success");
+    }
+    else {
+      Serial.println("Error sending the data");
+    }
+  } else {
+    digitalWrite(LEDPIN, 0);
+  }
+   
+  delay(300);
+}

door-detector-sender/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

readme.md

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+# ESP Door detector
+
+## Hardware used
+- 2x ESP32-C3 Supermini
+- 1x Red LED
+- 1x White LED
+- 1x Generich Reed Sensor
+- Resistors:
+    - 2x about 75Ω, I used the closest I had which was a 220Ω in series with a 100Ω Resistor (using a singe 100Ω Resistor each might also work, tho at lower brightness)
+
+## Software used
+- VScode with PlatformIO
+
+## Install / Usage
+- You can change the used pins at the top of each `main.cpp`, the defaults are
+    - **Receiver**
+        - LED `4`
+    - **Transmitter/Sender**
+        - LED `0`
+        - Reed Sensor `4`
+- Upload door-detector-sender to the ESP that will be installed a Door
+- Upload door-detector-receiver to the ESP that will be your indicator (for example besides your monitor)
+- Test if everything works correctly **BEFORE** soldering the components, I reccomend to use a Oszylloscope to check if the receiving ESP pulses at about 3Hz (300ms) on pin 4
+- If everything works correctly, you can then start by twisting together one 220Ω and one 100Ω Resistor
+- Now Solder one end of the Resistor-packs to the shorter leg of each LED, then solder the other end to the Ground pin (G) on the ESP
+- Continue by soldering the other Leg of each LED to the specified Pin above
+- At this State you should be able to plug both ESPs in and see each one shortly blinking at boot. After a few seconds, the Receiver's LED should start to blink at 3Hz. If not, check if each ESPnd for any shorts on the boards