Seperate into language folders

cpp/telemetry_common.cpp

@@ -0,0 +1,22 @@
+// Copyright (C) 2026 Hector van der Aa <hector@h3cx.dev>
+// Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
+// SPDX-License-Identifier: MIT
+#include "telemetry_common.h"
+#include <stdlib.h>
+
+uint16_t crc16_ccitt(const uint8_t *data, uint16_t length) {
+  uint16_t crc = 0xFFFF;
+
+  for (uint16_t i = 0; i < length; i++) {
+    crc ^= (uint16_t)data[i] << 8;
+
+    for (uint8_t j = 0; j < 8; j++) {
+      if (crc & 0x8000)
+        crc = (crc << 1) ^ 0x1021;
+      else
+        crc <<= 1;
+    }
+  }
+
+  return crc;
+}

cpp/telemetry_common.h

@@ -0,0 +1,40 @@
+// Copyright (C) 2026 Hector van der Aa <hector@h3cx.dev>
+// Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
+// SPDX-License-Identifier: MIT
+#pragma once
+#include <inttypes.h>
+
+#pragma pack(push, 1)
+struct TelemetryPacket1 {
+  char ping_[4] = {'P', 'I', 'N', 'G'};
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct TelemetryPacket2 {
+  float vbat;
+  float teng;
+  float lat;
+  float lng;
+  float speed;
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct TelemetryLoRaHeader {
+  uint8_t source_;
+  uint8_t dest_;
+  uint8_t version_;
+  uint8_t size_;
+  uint16_t crc16_;
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct TelemetryUARTHeader {
+  uint8_t magic_[4] = {0xAA, 0x55, 0xAA, 0x55};
+  uint8_t size_;
+};
+#pragma pack(pop)
+
+uint16_t crc16_ccitt(const uint8_t *data, uint16_t length);