Initial commit: Simple Sensor firmware for Heltec T114 with BME280

- MeshCore-based Simple Sensor firmware
- Heltec T114 without display
- BME280 sensor support (temp/humidity/pressure)
- Radio: 868.856018 MHz, SF7, BW62.5 kHz, CR4/7
- 2-byte path hash
- PlatformIO project

src/helpers/IdentityStore.cpp

@@ -0,0 +1,93 @@
+#include "IdentityStore.h"
+
+bool IdentityStore::load(const char *name, mesh::LocalIdentity& id) {
+  bool loaded = false;
+  char filename[40];
+  sprintf(filename, "%s/%s.id", _dir, name);
+  if (_fs->exists(filename)) {
+#if defined(RP2040_PLATFORM)
+    File file = _fs->open(filename, "r");
+#else
+    File file = _fs->open(filename);
+#endif
+    if (file) {
+      loaded = id.readFrom(file);
+      file.close();
+    }
+  }
+  return loaded;
+}
+
+bool IdentityStore::load(const char *name, mesh::LocalIdentity& id, char display_name[], int max_name_sz) {
+  bool loaded = false;
+  char filename[40];
+  sprintf(filename, "%s/%s.id", _dir, name);
+  if (_fs->exists(filename)) {
+#if defined(RP2040_PLATFORM)
+    File file = _fs->open(filename, "r");
+#else
+    File file = _fs->open(filename);
+#endif
+    if (file) {
+      loaded = id.readFrom(file);
+
+      int n = max_name_sz;   // up to 32 bytes
+      if (n > 32) n = 32;
+      file.read((uint8_t *) display_name, n);
+      display_name[n - 1] = 0;  // ensure null terminator
+
+      file.close();
+    }
+  }
+  return loaded;
+}
+
+bool IdentityStore::save(const char *name, const mesh::LocalIdentity& id) {
+  char filename[40];
+  sprintf(filename, "%s/%s.id", _dir, name);
+
+#if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
+  _fs->remove(filename);
+  File file = _fs->open(filename, FILE_O_WRITE);
+#elif defined(RP2040_PLATFORM)
+  File file = _fs->open(filename, "w");
+#else
+  File file = _fs->open(filename, "w", true);
+#endif
+  if (file) {
+    bool success = id.writeTo(file);
+    file.close();
+    MESH_DEBUG_PRINTLN("IdentityStore::save() write - %s", success ? "OK" : "Err");
+    return true;
+  }
+  MESH_DEBUG_PRINTLN("IdentityStore::save() failed");
+  return false;
+}
+
+bool IdentityStore::save(const char *name, const mesh::LocalIdentity& id, const char display_name[]) {
+  char filename[40];
+  sprintf(filename, "%s/%s.id", _dir, name);
+
+#if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
+  _fs->remove(filename);
+  File file = _fs->open(filename, FILE_O_WRITE);
+#elif defined(RP2040_PLATFORM)
+  File file = _fs->open(filename, "w");
+#else
+  File file = _fs->open(filename, "w", true);
+#endif
+  if (file) {
+    id.writeTo(file);
+
+    uint8_t tmp[32];
+    memset(tmp, 0, sizeof(tmp));
+    int n = strlen(display_name);
+    if (n > sizeof(tmp)-1) n = sizeof(tmp)-1;
+    memcpy(tmp, display_name, n);
+    file.write(tmp, sizeof(tmp));
+
+    file.close();
+    return true;
+  }
+  return false;
+}