Ano-sys
151 lines
3.4 KiB
Arduino
151 lines
3.4 KiB
Arduino
#include <SPI.h>
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#include <LoRa.h>
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#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include <Adafruit_SSD1306.h>
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#define SYNC_WORD 0xCE
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#define SENDER_ID 0xAA
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#define SELF_ID 0xAB
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#define BUTTON_PULLUP_PIN 22
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#define BUTTON_SIGNAL_PIN 19
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#define LORA_SCK 5
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#define LORA_MISO 19
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#define LORA_MOSI 27
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#define LORA_CS 18
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#define LORA_RST 23
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#define LORA_IRQ 26
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#define LORA_FREQ 868E6
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// OLED Settings
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#define SCREEN_WIDTH 128
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#define SCREEN_HEIGHT 64
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#define OLED_RESET -1
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Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
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void sendMessage(const String& msg) {
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LoRa.beginPacket();
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LoRa.write(SYNC_WORD);
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LoRa.write(SENDER_ID);
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LoRa.write(msg.length());
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LoRa.print(msg);
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LoRa.endPacket(true);
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}
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bool receiveMessage(String& out) {
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LoRa.parsePacket();
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byte sync = LoRa.read();
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byte sender = LoRa.read();
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if (sync != SYNC_WORD || sender != SELF_ID) {
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LoRa.flush();
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// Serial.println("Unidentifiziertes Paket: " + String(sync) + String(sender));
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return false;
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}
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byte len = LoRa.read();
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String data;
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while (LoRa.available()) data += (char)LoRa.read();
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if (data.length() != len) {
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out = "ERR: LEN";
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} else {
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out = data;
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sendMessage("ACK");
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}
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return true;
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}
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void showOnOLED(const String& line1, const String& line2 = "", const String& line3 = "") {
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display.clearDisplay();
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display.setTextSize(1);
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display.setTextColor(SSD1306_WHITE);
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display.setCursor(0, 0);
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display.println(line1);
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if (line2.length()) {
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display.setCursor(0, 16);
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display.println(line2);
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}
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if (line3.length()) {
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display.setCursor(0, 32);
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display.println(line3);
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}
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display.display();
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}
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void printHelp() {
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Serial.println("g – Standort anfragen\nh – Hilfe");
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showOnOLED("Befehle:", "g Standort / h Hilfe");
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}
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void handleCommandG() {
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sendMessage("g");
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unsigned long t0 = millis();
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String answer;
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while (millis() - t0 < 1000) {
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if (receiveMessage(answer)) {
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Serial.println(answer);
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showOnOLED("Antwort von Sender:", answer);
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return;
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}
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delay(10);
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}
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Serial.println("Timeout");
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showOnOLED("Timeout beim", "Empfangen");
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}
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void setup() {
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Serial.begin(115200);
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pinMode(BUTTON_PULLUP_PIN, INPUT_PULLUP);
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pinMode(BUTTON_SIGNAL_PIN, INPUT_PULLDOWN);
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// OLED init
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Wire.begin(); // SDA/SCL Default
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if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
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Serial.println("OLED init fehlgeschlagen");
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while (1) delay(1000);
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}
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showOnOLED("LoRa OLED Init", "Bitte warten...");
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// LoRa init
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SPI.begin(LORA_SCK, LORA_MISO, LORA_MOSI, LORA_CS);
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LoRa.setPins(LORA_CS, LORA_RST, LORA_IRQ);
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if (!LoRa.begin(LORA_FREQ)) {
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Serial.println("Konnte LoRa nicht initialisieren!");
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showOnOLED("LoRa Init fehl", "Neustart nötig");
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while (1) delay(1000);
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}
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LoRa.enableCrc();
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showOnOLED("LoRa bereit", "Creator:", "Timo Niemann");
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}
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void loop() {
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if (digitalRead(BUTTON_SIGNAL_PIN) == HIGH) {
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Serial.println("Button gedrueckt -> sende 'g'");
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showOnOLED("Knopf gedrueckt", "GPS angefragt");
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handleCommandG();
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while (digitalRead(BUTTON_SIGNAL_PIN) == HIGH) delay(10);
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delay(50);
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}
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if (Serial.available()) {
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char cmd = Serial.read();
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switch (cmd) {
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case 'h': printHelp(); break;
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case 'g': handleCommandG(); break;
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default: printHelp(); break;
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}
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}
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String msg;
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if (receiveMessage(msg)) {
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Serial.printf("RX: %s\n", msg.c_str());
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showOnOLED("Empfangen:", msg);
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}
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}
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