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radon_eye_rd200.cpp
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radon_eye_rd200.cpp
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#include "radon_eye_rd200.h"
#ifdef USE_ESP32
namespace esphome {
namespace radon_eye_rd200 {
static const char *const TAG = "radon_eye_rd200";
void RadonEyeRD200::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if,
esp_ble_gattc_cb_param_t *param) {
switch (event) {
case ESP_GATTC_OPEN_EVT: {
if (param->open.status == ESP_GATT_OK) {
ESP_LOGI(TAG, "Connected successfully!");
}
break;
}
case ESP_GATTC_DISCONNECT_EVT: {
ESP_LOGW(TAG, "Disconnected!");
break;
}
case ESP_GATTC_SEARCH_CMPL_EVT: {
this->read_handle_ = 0;
auto *chr = this->parent()->get_characteristic(service_uuid_, sensors_read_characteristic_uuid_);
if (chr == nullptr) {
ESP_LOGW(TAG, "No sensor read characteristic found at service %s char %s", service_uuid_.to_string().c_str(),
sensors_read_characteristic_uuid_.to_string().c_str());
break;
}
this->read_handle_ = chr->handle;
// Write a 0x50 to the write characteristic.
auto *write_chr = this->parent()->get_characteristic(service_uuid_, sensors_write_characteristic_uuid_);
if (write_chr == nullptr) {
ESP_LOGW(TAG, "No sensor write characteristic found at service %s char %s", service_uuid_.to_string().c_str(),
sensors_read_characteristic_uuid_.to_string().c_str());
break;
}
this->write_handle_ = write_chr->handle;
this->node_state = esp32_ble_tracker::ClientState::ESTABLISHED;
write_query_message_();
request_read_values_();
break;
}
case ESP_GATTC_READ_CHAR_EVT: {
if (param->read.conn_id != this->parent()->conn_id)
break;
if (param->read.status != ESP_GATT_OK) {
ESP_LOGW(TAG, "Error reading char at handle %d, status=%d", param->read.handle, param->read.status);
break;
}
if (param->read.handle == this->read_handle_) {
read_sensors_(param->read.value, param->read.value_len);
}
break;
}
default:
break;
}
}
void RadonEyeRD200::read_sensors_(uint8_t *value, uint16_t value_len) {
if (value_len < 20) {
ESP_LOGD(TAG, "Invalid read");
return;
}
// Example data
// [13:08:47][D][radon_eye_rd200:107]: result bytes: 5010 85EBB940 00000000 00000000 2200 2500 0000
ESP_LOGV(TAG, "result bytes: %02X%02X %02X%02X%02X%02X %02X%02X%02X%02X %02X%02X%02X%02X %02X%02X %02X%02X %02X%02X",
value[0], value[1], value[2], value[3], value[4], value[5], value[6], value[7], value[8], value[9],
value[10], value[11], value[12], value[13], value[14], value[15], value[16], value[17], value[18],
value[19]);
if (value[0] != 0x50) {
// This isn't a sensor reading.
return;
}
// Convert from pCi/L to Bq/m³
constexpr float convert_to_bwpm3 = 37.0;
RadonValue radon_value;
radon_value.chars[0] = value[2];
radon_value.chars[1] = value[3];
radon_value.chars[2] = value[4];
radon_value.chars[3] = value[5];
float radon_now = radon_value.number * convert_to_bwpm3;
if (is_valid_radon_value_(radon_now)) {
radon_sensor_->publish_state(radon_now);
}
radon_value.chars[0] = value[6];
radon_value.chars[1] = value[7];
radon_value.chars[2] = value[8];
radon_value.chars[3] = value[9];
float radon_day = radon_value.number * convert_to_bwpm3;
radon_value.chars[0] = value[10];
radon_value.chars[1] = value[11];
radon_value.chars[2] = value[12];
radon_value.chars[3] = value[13];
float radon_month = radon_value.number * convert_to_bwpm3;
if (is_valid_radon_value_(radon_month)) {
ESP_LOGV(TAG, "Radon Long Term based on month");
radon_long_term_sensor_->publish_state(radon_month);
} else if (is_valid_radon_value_(radon_day)) {
ESP_LOGV(TAG, "Radon Long Term based on day");
radon_long_term_sensor_->publish_state(radon_day);
}
ESP_LOGV(TAG, " Measurements (Bq/m³) now: %0.03f, day: %0.03f, month: %0.03f", radon_now, radon_day, radon_month);
ESP_LOGV(TAG, " Measurements (pCi/L) now: %0.03f, day: %0.03f, month: %0.03f", radon_now / convert_to_bwpm3,
radon_day / convert_to_bwpm3, radon_month / convert_to_bwpm3);
// This instance must not stay connected
// so other clients can connect to it (e.g. the
// mobile app).
parent()->set_enabled(false);
}
bool RadonEyeRD200::is_valid_radon_value_(float radon) { return radon > 0.0 and radon < 37000; }
void RadonEyeRD200::update() {
if (this->node_state != esp32_ble_tracker::ClientState::ESTABLISHED) {
if (!parent()->enabled) {
ESP_LOGW(TAG, "Reconnecting to device");
parent()->set_enabled(true);
parent()->connect();
} else {
ESP_LOGW(TAG, "Connection in progress");
}
}
}
void RadonEyeRD200::write_query_message_() {
ESP_LOGV(TAG, "writing 0x50 to write service");
int request = 0x50;
auto status = esp_ble_gattc_write_char_descr(this->parent()->gattc_if, this->parent()->conn_id, this->write_handle_,
sizeof(request), (uint8_t *) &request, ESP_GATT_WRITE_TYPE_NO_RSP,
ESP_GATT_AUTH_REQ_NONE);
if (status) {
ESP_LOGW(TAG, "Error sending write request for sensor, status=%d", status);
}
}
void RadonEyeRD200::request_read_values_() {
auto status = esp_ble_gattc_read_char(this->parent()->gattc_if, this->parent()->conn_id, this->read_handle_,
ESP_GATT_AUTH_REQ_NONE);
if (status) {
ESP_LOGW(TAG, "Error sending read request for sensor, status=%d", status);
}
}
void RadonEyeRD200::dump_config() {
LOG_SENSOR(" ", "Radon", this->radon_sensor_);
LOG_SENSOR(" ", "Radon Long Term", this->radon_long_term_sensor_);
}
RadonEyeRD200::RadonEyeRD200()
: PollingComponent(10000),
service_uuid_(esp32_ble_tracker::ESPBTUUID::from_raw(SERVICE_UUID)),
sensors_write_characteristic_uuid_(esp32_ble_tracker::ESPBTUUID::from_raw(WRITE_CHARACTERISTIC_UUID)),
sensors_read_characteristic_uuid_(esp32_ble_tracker::ESPBTUUID::from_raw(READ_CHARACTERISTIC_UUID)) {}
} // namespace radon_eye_rd200
} // namespace esphome
#endif // USE_ESP32