Ano-sys
152 lines
3.4 KiB
Arduino
152 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 RECEIVER_ID 0xAB // receiver
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#define SELF_ID 0xAA // sender
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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(RECEIVER_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 waitForPacket(unsigned long timeout_ms) {
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unsigned long t0 = millis();
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while (millis() - t0 < timeout_ms) {
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if (LoRa.parsePacket()) return true;
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delay(5);
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}
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return false; // Timeout
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}
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bool getPacket(String& payload, byte& id) {
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LoRa.parsePacket();
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byte sync = LoRa.read();
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id = LoRa.read();
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if (sync != SYNC_WORD || id != SELF_ID) {
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LoRa.flush();
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Serial.println("Unidentifiziertes Paket: " + String(sync) + String(id));
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return false;
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}
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byte len = LoRa.read();
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while (LoRa.available()) payload += (char)LoRa.read();
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return (payload.length() == len);
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}
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/*
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bool waitForAck(unsigned long timeout_ms = 1000) {
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if (!waitForPacket(timeout_ms)) return false;
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String payload;
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byte snd;
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if (!getPacket(payload, snd)) return false;
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return (snd == RECEIVER_ID && payload == "ACK");
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}
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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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String readGpsLine() {
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static int counter = 1;
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return String(counter++);
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}
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void setup() {
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Serial.begin(115200);
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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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// showOnOLED("Status:", "Warten");
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if (waitForPacket(10)) {
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String cmd;
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byte snd;
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if (!getPacket(cmd, snd)) {
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showOnOLED("Fehler:", "Packet ungueltig");
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return;
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}
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if (cmd == "g") {
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Serial.println("Empfangen: " + cmd);
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showOnOLED("Empfangen von:", "ID " + String(snd), "Cmd: " + cmd);
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String gps = readGpsLine();
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Serial.println("Sende GPS: " + gps);
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showOnOLED("Sende GPS Koords:", gps);
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sendMessage(gps);
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/*
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// Auf ACK warten
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if (waitForAck()) {
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Serial.println("ACK empfangen");
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showOnOLED("ACK empfangen", "");
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} else {
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Serial.println("ACK fehlte!");
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showOnOLED("WARNUNG:", "Kein ACK erhalten");
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}
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*/
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delay(1000);
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}
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}
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}
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