espnow_transport.cpp

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#include "espnow_transport.h"
 
#ifdef USE_ESP32
 
#include "esphome/core/application.h"
#include "esphome/core/log.h"
 
namespace esphome::espnow {
 
static const char *const TAG = "espnow.transport";
 
bool ESPNowTransport::should_send() { return this->parent_ != nullptr && !this->parent_->is_failed(); }
 
void ESPNowTransport::setup() {
  PacketTransport::setup();
 
  if (this->parent_ == nullptr) {
    ESP_LOGE(TAG, "ESPNow component not set");
    this->mark_failed();
    return;
  }
 
  ESP_LOGI(TAG, "Registering ESP-NOW handlers, peer: %02X:%02X:%02X:%02X:%02X:%02X", this->peer_address_[0],
           this->peer_address_[1], this->peer_address_[2], this->peer_address_[3], this->peer_address_[4],
           this->peer_address_[5]);
 
  // Register received handler
  this->parent_->register_receive_handler(this);
 
  // Register broadcast handler
  this->parent_->register_broadcast_handler(this);
}
 
void ESPNowTransport::send_packet(const std::vector<uint8_t> &buf) const {
  if (this->parent_ == nullptr) {
    ESP_LOGE(TAG, "ESPNow component not set");
    return;
  }
 
  if (buf.empty()) {
    ESP_LOGW(TAG, "Attempted to send empty packet");
    return;
  }
 
  if (buf.size() > ESPNOW_MAX_DATA_LEN) {
    ESP_LOGE(TAG, "Packet too large: %zu bytes (max %u)", buf.size(), (unsigned) ESPNOW_MAX_DATA_LEN);
    return;
  }
 
  // Send to configured peer address
  this->parent_->send(this->peer_address_.data(), buf.data(), buf.size(), [](esp_err_t err) {
    if (err != ESP_OK) {
      ESP_LOGW(TAG, "Send failed: %d", err);
    }
  });
}
 
bool ESPNowTransport::on_receive(const ESPNowRecvInfo &info, const uint8_t *data, uint16_t size) {
  ESP_LOGV(TAG, "Received packet of size %u from %02X:%02X:%02X:%02X:%02X:%02X", (unsigned) size, info.src_addr[0],
           info.src_addr[1], info.src_addr[2], info.src_addr[3], info.src_addr[4], info.src_addr[5]);
 
  if (data == nullptr || size == 0) {
    ESP_LOGW(TAG, "Received empty or null packet");
    return false;
  }
 
  this->packet_buffer_.resize(size);
  memcpy(this->packet_buffer_.data(), data, size);
  this->process_(this->packet_buffer_);
  return false;  // Allow other handlers to run
}
 
bool ESPNowTransport::on_broadcast(const ESPNowRecvInfo &info, const uint8_t *data, uint16_t size) {
  ESP_LOGV(TAG, "Received broadcast packet of size %u from %02X:%02X:%02X:%02X:%02X:%02X", (unsigned) size,
           info.src_addr[0], info.src_addr[1], info.src_addr[2], info.src_addr[3], info.src_addr[4], info.src_addr[5]);
 
  if (data == nullptr || size == 0) {
    ESP_LOGW(TAG, "Received empty or null broadcast packet");
    return false;
  }
 
  this->packet_buffer_.resize(size);
  memcpy(this->packet_buffer_.data(), data, size);
  this->process_(this->packet_buffer_);
  return false;  // Allow other handlers to run
}
 
}  // namespace esphome::espnow
 
#endif  // USE_ESP32