commit 4233fefd2e104e9c2f693c58fda28bbc06b74de9 Author: coolneng Date: Tue Apr 15 01:51:07 2025 +0200 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..a1051d6 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +data/config.json diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..3f531b0 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,672 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type YYshow c' for details. + +The hypothetical commands Yshow c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.org b/README.org new file mode 100644 index 0000000..557d712 --- /dev/null +++ b/README.org @@ -0,0 +1,58 @@ +* Muraqib + +Temperature and humidity sensor that sends its data via MQTT. The project is implemented using a Wemos D1 mini board with the following components: + +- DHT22 temperature and humidity sensor +- Battery shield +- 3.7V 1000mAh Lithium battery + +The sensor captures the data every 5 minutes and sends it to a MQTT broker and then enters deep sleep, it is important to save power as the device runs off a battery. This sensor is part of a project to grow mushrooms in a controlled environment. + +** Pinout of the board + +#+ATTR_HTML: :width 40% +[[./pinout.png]] + +** Dependencies +- [[https://github.com/adafruit/DHT-sensor-library][Adafruit DHT sensor library]] +- [[https://github.com/adafruit/Adafruit_Sensor][Adafruit Unified Sensor Driver]] +- [[https://github.com/knolleary/pubsubclient][PubSubClient]] +- [[https://github.com/bblanchon/ArduinoJson][ArduinoJSON]] +** Configuration + +In the data directory, there is a JSON file that allows the configuration of multiple values: + +- ssid: WiFi network name +- psk: WiFi password +- mqtt_host: IP address of the MQTT broker +- mqtt_user: username that has write access on the MQTT broker +- mqtt_password: password for the user that has write access on the MQTT broker +- mqtt_port: port used by the MQTT broker +- mqtt_topic: channel name +- device_id: unique identifier of the sensor +- sleep_time: time interval between each data transmission +- connection_attempts: maximum connection attemps to the network + +The file needs to be renamed to config.json + +** Deployment + +The software uses the Arduino framework and the development environment of [[https://platformio.org/][PlatformIO]], which offers better tooling than the official Arduino IDE. + +1. Upload the configuration file to the board: + +#+begin_src shell +pio run -t uploadfs +#+end_src + +2. Compile the project + +#+begin_src shell +pio run -t compile +#+end_src + +3. Upload firmware + +#+begin_src shell +pio run -t upload +#+end_src diff --git a/data/config.json b/data/config.json new file mode 100644 index 0000000..4769029 --- /dev/null +++ b/data/config.json @@ -0,0 +1,12 @@ +{ + "ssid": "Zingarata", + "psk": "shlomoshekelson42", + "mqtt_host": "192.168.13.2", + "mqtt_user": "homeostasis", + "mqtt_password": "8fbb169b0ca25ef66dfec6f1cbc6076e95960369", + "mqtt_port": 1883, + "mqtt_topic": "homeostasis/room", + "device_id": "homeostasis", + "sleep_time": 15, + "connection_attempts": 120 +} diff --git a/data/example.json b/data/example.json new file mode 100644 index 0000000..9ad222c --- /dev/null +++ b/data/example.json @@ -0,0 +1,12 @@ +{ + "ssid": "", + "psk": "", + "mqtt_host": "", + "mqtt_user": "", + "mqtt_password": "", + "mqtt_port": 1883, + "mqtt_topic": "", + "device_id": "", + "sleep_time": 30, + "connection_attempts": 60 +} diff --git a/flake.lock b/flake.lock new file mode 100644 index 0000000..cd0ea28 --- /dev/null +++ b/flake.lock @@ -0,0 +1,27 @@ +{ + "nodes": { + "nixpkgs": { + "locked": { + "lastModified": 1744646643, + "narHash": "sha256-gswCvHOZvcHtY/5fIWYlz/VxMAIUQ6XFRZB/rxlH3OA=", + "owner": "NixOS", + "repo": "nixpkgs", + "rev": "a6165272f0074877f7c0c45fe6eba86d1e18e80d", + "type": "github" + }, + "original": { + "owner": "NixOS", + "ref": "nixos-unstable-small", + "repo": "nixpkgs", + "type": "github" + } + }, + "root": { + "inputs": { + "nixpkgs": "nixpkgs" + } + } + }, + "root": "root", + "version": 7 +} diff --git a/flake.nix b/flake.nix new file mode 100644 index 0000000..49f395e --- /dev/null +++ b/flake.nix @@ -0,0 +1,25 @@ +{ + inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable-small"; + + outputs = + { self, nixpkgs, ... }: + let + system = "x86_64-linux"; + in + { + devShells."${system}".default = + let + pkgs = import nixpkgs { + inherit system; + }; + in + pkgs.mkShell { + packages = with pkgs; [ + clang + platformio + ]; + + shellHook = ""; + }; + }; +} diff --git a/include/README b/include/README new file mode 100644 index 0000000..194dcd4 --- /dev/null +++ b/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/include/config.h b/include/config.h new file mode 100644 index 0000000..176e45d --- /dev/null +++ b/include/config.h @@ -0,0 +1,27 @@ +#ifndef CONFIG_H_ +#define CONFIG_H_ + +#include "FS.h" +#include "LittleFS.h" +#include + +typedef struct { + const char *ssid; + const char *psk; + const char *mqtt_host; + const char *mqtt_user; + const char *mqtt_password; + const char *topic; + const char *device_id; + int mqtt_port; + long sleep_time; + int connection_attempts; +} Config; + +void initialize_config(Config *config, StaticJsonDocument<512> json); + +bool load_config_file(const char *file_path, Config *config); + +long minutes_to_microseconds(int minutes); + +#endif // CONFIG_H_ diff --git a/include/wlan.h b/include/wlan.h new file mode 100644 index 0000000..063b422 --- /dev/null +++ b/include/wlan.h @@ -0,0 +1,16 @@ +#ifndef WLAN_H +#define WLAN_H + +#include "config.h" +#include +#include + +void initial_connection(const char *ssid, const char *psk); +void connect_wlan(Config *config); +void connect_mqtt(PubSubClient &client, Config *config); +void disconnect_mqtt(PubSubClient &client, const char *topic); +size_t construct_json(float *data, char *buffer, int buffer_size); +void mqtt_transfer(PubSubClient &client, Config *config, float *data); +void enter_deep_sleep(bool wifi_timeout, int sleep_time); + +#endif /* WLAN_H */ diff --git a/lib/README b/lib/README new file mode 100644 index 0000000..6debab1 --- /dev/null +++ b/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/pinout.png b/pinout.png new file mode 100644 index 0000000..06646f8 Binary files /dev/null and b/pinout.png differ diff --git a/platformio.ini b/platformio.ini new file mode 100644 index 0000000..5f9dd80 --- /dev/null +++ b/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:d1_mini] +platform = espressif8266 +board = d1_mini +board_build.filesystem = littlefs +framework = arduino +lib_deps = + adafruit/DHT sensor library@^1.4.4 + adafruit/Adafruit Unified Sensor@^1.1.9 + knolleary/PubSubClient@^2.8 + bblanchon/ArduinoJson@^6.21.1 diff --git a/src/config.cpp b/src/config.cpp new file mode 100644 index 0000000..9f10c59 --- /dev/null +++ b/src/config.cpp @@ -0,0 +1,30 @@ +#include "config.h" + +void initialize_config(Config *config, StaticJsonDocument<512> json) { + config->ssid = strdup(json["ssid"]); + config->psk = strdup(json["psk"]); + config->mqtt_host = strdup(json["mqtt_host"]); + config->mqtt_user = strdup(json["mqtt_user"]); + config->mqtt_password = strdup(json["mqtt_password"]); + config->topic = strdup(json["mqtt_topic"]); + config->device_id = strdup(json["device_id"]); + config->mqtt_port = json["mqtt_port"]; + config->sleep_time = minutes_to_microseconds(json["sleep_time"]); + config->connection_attempts = json["connection_attempts"]; +} + +bool load_config_file(const char *file_path, Config *config) { + if (!LittleFS.begin()) + return false; + File config_file = LittleFS.open(file_path, "r"); + if (!config_file) + return false; + StaticJsonDocument<512> json; + DeserializationError err = deserializeJson(json, config_file); + if (err) + return false; + initialize_config(config, json); + return true; +} + +long minutes_to_microseconds(int minutes) { return (minutes * 6e7); } diff --git a/src/main.cpp b/src/main.cpp new file mode 100644 index 0000000..ef9d41d --- /dev/null +++ b/src/main.cpp @@ -0,0 +1,41 @@ +#include "config.h" +#include "wlan.h" +#include +#include + +#define DHTTYPE DHT22 +#define DHTPIN 4 +DHT dht(DHTPIN, DHTTYPE); + +const int fc28_pin = A0; +const char *config_file_path = "/config.json"; +Config *config; +WiFiClient wifi_client; +PubSubClient mqtt_client(wifi_client); + +bool check_valid_value(float value) { + return (!isnan(value) && value >= 0 && value <= 100); +} + +void setup() { + Serial.begin(9600); + dht.begin(); + config = (Config *)malloc(sizeof(Config)); + if (!load_config_file(config_file_path, config)) + Serial.println("ERROR: The config file could not be loaded"); + connect_wlan(config); +} + +void loop() { + float temperature = dht.readTemperature(); + float humidity = dht.readHumidity(); + int analog_val = analogRead(fc28_pin); + int soil_percentage = map(analog_val, 0, 1023, 0, 100); + float data[3] = {temperature, humidity, static_cast(soil_percentage)}; + if (check_valid_value(temperature) && check_valid_value(humidity)) { + mqtt_transfer(mqtt_client, config, data); + } + disconnect_mqtt(mqtt_client, config->topic); + free(config); + enter_deep_sleep(false, config->sleep_time); +} diff --git a/src/wlan.cpp b/src/wlan.cpp new file mode 100644 index 0000000..26d19b9 --- /dev/null +++ b/src/wlan.cpp @@ -0,0 +1,63 @@ +#include "wlan.h" +#include + +void initial_connection(const char *ssid, const char *psk) { + WiFi.begin(ssid, psk); + WiFi.persistent(true); + WiFi.setAutoConnect(true); + WiFi.setAutoReconnect(true); +} + +void connect_wlan(Config *config) { + if (WiFi.SSID() != config->ssid) + initial_connection(config->ssid, config->psk); + int retries = 0; + while (WiFi.status() != WL_CONNECTED) { + if (retries == config->connection_attempts) + enter_deep_sleep(true, config->sleep_time); + retries++; + delay(1000); + Serial.print("."); + } + Serial.println("WiFi connected"); +} + +void connect_mqtt(PubSubClient &client, Config *config) { + if (!client.connected()) + client.setServer(config->mqtt_host, config->mqtt_port); + if (client.connect(config->device_id, config->mqtt_user, + config->mqtt_password)) { + Serial.println("MQTT connected"); + client.subscribe(config->topic); + } +} + +void disconnect_mqtt(PubSubClient &client, const char *topic) { + Serial.println("Disconnecting MQTT"); + client.unsubscribe(topic); + client.disconnect(); +} + +size_t construct_json(float *data, char *buffer, int buffer_size) { + StaticJsonDocument<100> json; + json["temperature"] = data[0]; + json["humidity"] = data[1]; + json["soil_humidity"] = data[2]; + size_t payload_size = serializeJson(json, buffer, buffer_size); + return payload_size; +} + +void mqtt_transfer(PubSubClient &client, Config *config, float *data) { + char buffer[100]; + connect_mqtt(client, config); + size_t payload_size = construct_json(data, buffer, 100); + client.publish(config->topic, buffer, payload_size); + Serial.println("Data transferred successfully"); +} + +void enter_deep_sleep(bool wifi_timeout, int sleep_time) { + Serial.println("Entering deep sleep"); + if (wifi_timeout) + WiFi.disconnect(); + ESP.deepSleep(sleep_time, WAKE_RF_DEFAULT); +} diff --git a/test/README b/test/README new file mode 100644 index 0000000..9b1e87b --- /dev/null +++ b/test/README @@ -0,0 +1,11 @@ + +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