From 9e1e0606bf6939fb8ba66d11785fa4845f33b0a3 Mon Sep 17 00:00:00 2001
From: ReiMerc <reim0009@edu.mercantec.dk>
Date: Tue, 28 Nov 2023 22:48:48 +0100
Subject: [PATCH] Receive MQTT messages on arduino and display when it has to
 dispense

---
 arduino/.gitignore         |  2 +
 arduino/Makefile           |  7 ++++
 arduino/arduino.ino        | 78 +++++++++++++++++++++++++++++++++++++-
 arduino/secrets.template.h | 13 +++++++
 4 files changed, 98 insertions(+), 2 deletions(-)
 create mode 100644 arduino/.gitignore
 create mode 100644 arduino/Makefile
 create mode 100644 arduino/secrets.template.h

diff --git a/arduino/.gitignore b/arduino/.gitignore
new file mode 100644
index 0000000..7fc9e3c
--- /dev/null
+++ b/arduino/.gitignore
@@ -0,0 +1,2 @@
+secrets.h
+
diff --git a/arduino/Makefile b/arduino/Makefile
new file mode 100644
index 0000000..a7f263c
--- /dev/null
+++ b/arduino/Makefile
@@ -0,0 +1,7 @@
+compile:
+	arduino-cli compile --fqbn arduino:samd:mkrwifi1010
+
+run: compile
+	sudo arduino-cli upload --fqbn arduino:samd:mkrwifi1010 --port /dev/ttyACM0
+	sudo cat /dev/ttyACM0
+
diff --git a/arduino/arduino.ino b/arduino/arduino.ino
index 74f966a..e7c90ef 100644
--- a/arduino/arduino.ino
+++ b/arduino/arduino.ino
@@ -1,6 +1,80 @@
+#include <Arduino_MKRIoTCarrier.h>
+#include <WiFiNINA.h>
+#include <ArduinoMqttClient.h>
 
-void setup() {
+#include "secrets.h"
+
+MKRIoTCarrier carrier;
+WiFiSSLClient wifi_client;
+MqttClient mqtt_client(wifi_client);
+
+extern const char *wifi_ssid;
+extern const char *wifi_password;
+
+extern const char *mqtt_server;
+extern const char *mqtt_username;
+extern const char *mqtt_password;
+
+void setup(void)
+{
+	Serial.begin(9600);
+
+	Serial.println("Started");
+
+	carrier.begin();
+	carrier.display.init(240, 240);
+
+	pinMode(TFT_BACKLIGHT, OUTPUT);
+	digitalWrite(TFT_BACKLIGHT, HIGH);
+
+	carrier.display.setCursor(20, 100);
+	carrier.display.setTextSize(3);
+	carrier.display.print("Connecting..");
+
+	Serial.println("Connecting to WiFi...");
+
+	if (wifi_enterprise) WiFi.beginEnterprise(wifi_ssid, wifi_username, wifi_password);
+	else WiFi.begin(wifi_ssid, wifi_password);
+
+	while (WiFi.status() != WL_CONNECTED) delay(1000);
+
+	Serial.println("Connected to WiFi, connecting to MQTT...");
+
+	mqtt_client.setUsernamePassword(mqtt_username, mqtt_password);
+	if (!mqtt_client.connect(mqtt_server, 8883)) {
+		Serial.print("MQTT connection failed with error code: ");
+		Serial.println(mqtt_client.connectError());
+		return;
+	}
+
+	Serial.println("Connected to MQTT");
+
+	mqtt_client.subscribe("dispense");
+
+	carrier.display.fillScreen(0x000);
 }
 
-void loop() {
+void loop(void)
+{
+	int message_size = mqtt_client.parseMessage();
+	if (message_size) {
+		Serial.print("Got message with topic: ");
+		Serial.println(mqtt_client.messageTopic());
+
+		if (mqtt_client.messageTopic() == "dispense") {
+			Serial.println("Dispensing...");
+
+			// TODO Connect to motor
+
+			carrier.display.fillScreen(0x000);
+			carrier.display.setCursor(20, 100);
+			carrier.display.setTextSize(4);
+			carrier.display.print("Dispense");
+
+			delay(500);
+
+			carrier.display.fillScreen(0x000);
+		}
+	}
 }
+
diff --git a/arduino/secrets.template.h b/arduino/secrets.template.h
new file mode 100644
index 0000000..ba613da
--- /dev/null
+++ b/arduino/secrets.template.h
@@ -0,0 +1,13 @@
+#include <stdbool.h>
+
+// Copy this file to secrets.h and fill out the values
+
+const bool wifi_enterprise = false;
+const char *wifi_ssid = "Wifi-name";
+const char *wifi_username = ""; // Only used if wifi_enterprise = true
+const char *wifi_password = "password";
+
+const char *mqtt_server = "example.hivemq.cloud";
+const char *mqtt_username = "username";
+const char *mqtt_password = "password";
+