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108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
#include "b_parasite.h"
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#include "esphome/core/log.h"
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#ifdef USE_ESP32
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namespace esphome {
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namespace b_parasite {
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static const char *const TAG = "b_parasite";
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void BParasite::dump_config() {
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ESP_LOGCONFIG(TAG, "b_parasite");
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LOG_SENSOR(" ", "Battery Voltage", this->battery_voltage_);
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LOG_SENSOR(" ", "Temperature", this->temperature_);
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LOG_SENSOR(" ", "Humidity", this->humidity_);
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LOG_SENSOR(" ", "Soil Moisture", this->soil_moisture_);
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LOG_SENSOR(" ", "Illuminance", this->illuminance_);
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}
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bool BParasite::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
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if (device.address_uint64() != address_) {
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ESP_LOGVV(TAG, "parse_device(): unknown MAC address.");
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return false;
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}
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ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str().c_str());
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const auto &service_datas = device.get_service_datas();
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if (service_datas.size() != 1) {
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ESP_LOGE(TAG, "Unexpected service_datas size (%d)", service_datas.size());
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return false;
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}
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const auto &service_data = service_datas[0];
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ESP_LOGVV(TAG, "Service data:");
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for (const uint8_t byte : service_data.data) {
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ESP_LOGVV(TAG, "0x%02x", byte);
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}
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const auto &data = service_data.data;
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const uint8_t protocol_version = data[0] >> 4;
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if (protocol_version != 1 && protocol_version != 2) {
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ESP_LOGE(TAG, "Unsupported protocol version: %u", protocol_version);
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return false;
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}
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// Some b-parasite versions have an (optional) illuminance sensor.
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bool has_illuminance = data[0] & 0x1;
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// Counter for deduplicating messages.
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uint8_t counter = data[1] & 0x0f;
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if (last_processed_counter_ == counter) {
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ESP_LOGVV(TAG, "Skipping already processed counter (%u)", counter);
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return false;
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}
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// Battery voltage in millivolts.
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uint16_t battery_millivolt = data[2] << 8 | data[3];
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float battery_voltage = battery_millivolt / 1000.0f;
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// Temperature in 1000 * Celsius (protocol v1) or 100 * Celsius (protocol v2).
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float temp_celsius;
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if (protocol_version == 1) {
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uint16_t temp_millicelsius = data[4] << 8 | data[5];
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temp_celsius = temp_millicelsius / 1000.0f;
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} else {
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int16_t temp_centicelsius = data[4] << 8 | data[5];
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temp_celsius = temp_centicelsius / 100.0f;
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}
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// Relative air humidity in the range [0, 2^16).
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uint16_t humidity = data[6] << 8 | data[7];
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float humidity_percent = (100.0f * humidity) / (1 << 16);
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// Relative soil moisture in [0 - 2^16).
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uint16_t soil_moisture = data[8] << 8 | data[9];
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float moisture_percent = (100.0f * soil_moisture) / (1 << 16);
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// Ambient light in lux.
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float illuminance = has_illuminance ? data[16] << 8 | data[17] : 0.0f;
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if (battery_voltage_ != nullptr) {
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battery_voltage_->publish_state(battery_voltage);
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}
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if (temperature_ != nullptr) {
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temperature_->publish_state(temp_celsius);
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}
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if (humidity_ != nullptr) {
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humidity_->publish_state(humidity_percent);
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}
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if (soil_moisture_ != nullptr) {
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soil_moisture_->publish_state(moisture_percent);
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}
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if (illuminance_ != nullptr) {
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if (has_illuminance) {
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illuminance_->publish_state(illuminance);
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} else {
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ESP_LOGE(TAG, "No lux information is present in the BLE packet");
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}
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}
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last_processed_counter_ = counter;
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return true;
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}
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} // namespace b_parasite
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} // namespace esphome
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#endif // USE_ESP32
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