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Update ESP32 BLE ADV parse to match BLE spec (#904)

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* Update ESP32 BLE ADV parse to match BLE spec

* Update xiaomi

* Update ruuvi

* Format

* Update esp32_ble_tracker.cpp

* Fix log

* Format

* Update xiaomi_ble.cpp
This commit is contained in:
Otto Winter 2019-12-04 17:12:26 +01:00
parent dcc8bb83af
commit 219fe41831
No known key found for this signature in database
GPG Key ID: 48ED2DDB96D7682C
4 changed files with 142 additions and 76 deletions
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130
esphome/components/esp32_ble_tracker/esp32_ble_tracker.cpp
View File

@ -203,10 +203,6 @@ void ESP32BLETracker::gap_scan_result(const esp_ble_gap_cb_param_t::ble_scan_res
}
}
std::string hexencode_string(const std::string &raw_data) {
return hexencode(reinterpret_cast<const uint8_t *>(raw_data.c_str()), raw_data.size());
}
ESPBTUUID::ESPBTUUID() : uuid_() {}
ESPBTUUID ESPBTUUID::from_uint16(uint16_t uuid) {
ESPBTUUID ret;
@ -266,13 +262,13 @@ std::string ESPBTUUID::to_string() {
}
ESPBLEiBeacon::ESPBLEiBeacon(const uint8_t *data) { memcpy(&this->beacon_data_, data, sizeof(beacon_data_)); }
optional<ESPBLEiBeacon> ESPBLEiBeacon::from_manufacturer_data(const std::string &data) {
if (data.size() != 25)
return {};
if (data[0] != 0x4C || data[1] != 0x00)
optional<ESPBLEiBeacon> ESPBLEiBeacon::from_manufacturer_data(const ServiceData &data) {
if (!data.uuid.contains(0x4C, 0x00))
return {};
return ESPBLEiBeacon(reinterpret_cast<const uint8_t *>(data.data()));
if (data.data.size() != 23)
return {};
return ESPBLEiBeacon(data.data.data());
}
void ESPBTDevice::parse_scan_rst(const esp_ble_gap_cb_param_t::ble_scan_result_evt_param &param) {
@ -304,8 +300,8 @@ void ESPBTDevice::parse_scan_rst(const esp_ble_gap_cb_param_t::ble_scan_result_e
ESP_LOGVV(TAG, " RSSI: %d", this->rssi_);
ESP_LOGVV(TAG, " Name: '%s'", this->name_.c_str());
if (this->tx_power_.has_value()) {
ESP_LOGVV(TAG, " TX Power: %d", *this->tx_power_);
for (auto &it : this->tx_powers_) {
ESP_LOGVV(TAG, " TX Power: %d", it);
}
if (this->appearance_.has_value()) {
ESP_LOGVV(TAG, " Appearance: %u", *this->appearance_);
@ -313,20 +309,19 @@ void ESPBTDevice::parse_scan_rst(const esp_ble_gap_cb_param_t::ble_scan_result_e
if (this->ad_flag_.has_value()) {
ESP_LOGVV(TAG, " Ad Flag: %u", *this->ad_flag_);
}
for (auto uuid : this->service_uuids_) {
for (auto &uuid : this->service_uuids_) {
ESP_LOGVV(TAG, " Service UUID: %s", uuid.to_string().c_str());
}
ESP_LOGVV(TAG, " Manufacturer data: %s", hexencode_string(this->manufacturer_data_).c_str());
ESP_LOGVV(TAG, " Service data: %s", hexencode_string(this->service_data_).c_str());
if (this->service_data_uuid_.has_value()) {
ESP_LOGVV(TAG, " Service Data UUID: %s", this->service_data_uuid_->to_string().c_str());
for (auto &data : this->manufacturer_datas_) {
ESP_LOGVV(TAG, " Manufacturer data: %s", hexencode(data.data).c_str());
}
for (auto &data : this->service_datas_) {
ESP_LOGVV(TAG, " Service data:");
ESP_LOGVV(TAG, " UUID: %s", data.uuid.to_string().c_str());
ESP_LOGVV(TAG, " Data: %s", hexencode(data.data).c_str());
}
ESP_LOGVV(TAG, "Adv data: %s",
hexencode_string(
std::string(reinterpret_cast<const char *>(param.ble_adv), param.adv_data_len + param.scan_rsp_len))
.c_str());
ESP_LOGVV(TAG, "Adv data: %s", hexencode(param.ble_adv, param.adv_data_len + param.scan_rsp_len).c_str());
#endif
}
void ESPBTDevice::parse_adv_(const esp_ble_gap_cb_param_t::ble_scan_result_evt_param &param) {
@ -345,25 +340,52 @@ void ESPBTDevice::parse_adv_(const esp_ble_gap_cb_param_t::ble_scan_result_evt_p
const uint8_t record_length = field_length - 1;
offset += record_length;
// See also Generic Access Profile Assigned Numbers:
// https://www.bluetooth.com/specifications/assigned-numbers/generic-access-profile/ See also ADVERTISING AND SCAN
// RESPONSE DATA FORMAT: https://www.bluetooth.com/specifications/bluetooth-core-specification/ (vol 3, part C, 11)
// See also Core Specification Supplement: https://www.bluetooth.com/specifications/bluetooth-core-specification/
// (called CSS here)
switch (record_type) {
case ESP_BLE_AD_TYPE_NAME_CMPL: {
// CSS 1.2 LOCAL NAME
// "The Local Name data type shall be the same as, or a shortened version of, the local name assigned to the
// device." CSS 1: Optional in this context; shall not appear more than once in a block.
this->name_ = std::string(reinterpret_cast<const char *>(record), record_length);
break;
}
case ESP_BLE_AD_TYPE_TX_PWR: {
this->tx_power_ = *payload;
// CSS 1.5 TX POWER LEVEL
// "The TX Power Level data type indicates the transmitted power level of the packet containing the data type."
// CSS 1: Optional in this context (may appear more than once in a block).
this->tx_powers_.push_back(*payload);
break;
}
case ESP_BLE_AD_TYPE_APPEARANCE: {
// CSS 1.12 APPEARANCE
// "The Appearance data type defines the external appearance of the device."
// See also https://www.bluetooth.com/specifications/gatt/characteristics/
// CSS 1: Optional in this context; shall not appear more than once in a block and shall not appear in both
// the AD and SRD of the same extended advertising interval.
this->appearance_ = *reinterpret_cast<const uint16_t *>(record);
break;
}
case ESP_BLE_AD_TYPE_FLAG: {
// CSS 1.3 FLAGS
// "The Flags data type contains one bit Boolean flags. The Flags data type shall be included when any of the
// Flag bits are non-zero and the advertising packet is connectable, otherwise the Flags data type may be
// omitted."
// CSS 1: Optional in this context; shall not appear more than once in a block.
this->ad_flag_ = *record;
break;
}
// CSS 1.1 SERVICE UUID
// The Service UUID data type is used to include a list of Service or Service Class UUIDs.
// There are six data types defined for the three sizes of Service UUIDs that may be returned:
// CSS 1: Optional in this context (may appear more than once in a block).
case ESP_BLE_AD_TYPE_16SRV_CMPL:
case ESP_BLE_AD_TYPE_16SRV_PART: {
// • 16-bit Bluetooth Service UUIDs
for (uint8_t i = 0; i < record_length / 2; i++) {
this->service_uuids_.push_back(ESPBTUUID::from_uint16(*reinterpret_cast<const uint16_t *>(record + 2 * i)));
}
@ -371,6 +393,7 @@ void ESPBTDevice::parse_adv_(const esp_ble_gap_cb_param_t::ble_scan_result_evt_p
}
case ESP_BLE_AD_TYPE_32SRV_CMPL:
case ESP_BLE_AD_TYPE_32SRV_PART: {
// • 32-bit Bluetooth Service UUIDs
for (uint8_t i = 0; i < record_length / 4; i++) {
this->service_uuids_.push_back(ESPBTUUID::from_uint32(*reinterpret_cast<const uint32_t *>(record + 4 * i)));
}
@ -378,41 +401,70 @@ void ESPBTDevice::parse_adv_(const esp_ble_gap_cb_param_t::ble_scan_result_evt_p
}
case ESP_BLE_AD_TYPE_128SRV_CMPL:
case ESP_BLE_AD_TYPE_128SRV_PART: {
// • Global 128-bit Service UUIDs
this->service_uuids_.push_back(ESPBTUUID::from_raw(record));
break;
}
case ESP_BLE_AD_MANUFACTURER_SPECIFIC_TYPE: {
this->manufacturer_data_ = std::string(reinterpret_cast<const char *>(record), record_length);
// CSS 1.4 MANUFACTURER SPECIFIC DATA
// "The Manufacturer Specific data type is used for manufacturer specific data. The first two data octets shall
// contain a company identifier from Assigned Numbers. The interpretation of any other octets within the data
// shall be defined by the manufacturer specified by the company identifier."
// CSS 1: Optional in this context (may appear more than once in a block).
if (record_length < 2) {
ESP_LOGV(TAG, "Record length too small for ESP_BLE_AD_MANUFACTURER_SPECIFIC_TYPE");
break;
}
ServiceData data{};
data.uuid = ESPBTUUID::from_uint16(*reinterpret_cast<const uint16_t *>(record));
data.data.assign(record + 2UL, record + record_length);
this->manufacturer_datas_.push_back(data);
break;
}
// CSS 1.11 SERVICE DATA
// "The Service Data data type consists of a service UUID with the data associated with that service."
// CSS 1: Optional in this context (may appear more than once in a block).
case ESP_BLE_AD_TYPE_SERVICE_DATA: {
// «Service Data - 16 bit UUID»
// Size: 2 or more octets
// The first 2 octets contain the 16 bit Service UUID fol- lowed by additional service data
if (record_length < 2) {
ESP_LOGV(TAG, "Record length too small for ESP_BLE_AD_TYPE_SERVICE_DATA");
break;
}
this->service_data_uuid_ = ESPBTUUID::from_uint16(*reinterpret_cast<const uint16_t *>(record));
if (record_length > 2)
this->service_data_ = std::string(reinterpret_cast<const char *>(record + 2), record_length - 2UL);
ServiceData data{};
data.uuid = ESPBTUUID::from_uint16(*reinterpret_cast<const uint16_t *>(record));
data.data.assign(record + 2UL, record + record_length);
this->service_datas_.push_back(data);
break;
}
case ESP_BLE_AD_TYPE_32SERVICE_DATA: {
// «Service Data - 32 bit UUID»
// Size: 4 or more octets
// The first 4 octets contain the 32 bit Service UUID fol- lowed by additional service data
if (record_length < 4) {
ESP_LOGV(TAG, "Record length too small for ESP_BLE_AD_TYPE_32SERVICE_DATA");
break;
}
this->service_data_uuid_ = ESPBTUUID::from_uint32(*reinterpret_cast<const uint32_t *>(record));
if (record_length > 4)
this->service_data_ = std::string(reinterpret_cast<const char *>(record + 4), record_length - 4UL);
ServiceData data{};
data.uuid = ESPBTUUID::from_uint32(*reinterpret_cast<const uint32_t *>(record));
data.data.assign(record + 4UL, record + record_length);
this->service_datas_.push_back(data);
break;
}
case ESP_BLE_AD_TYPE_128SERVICE_DATA: {
// «Service Data - 128 bit UUID»
// Size: 16 or more octets
// The first 16 octets contain the 128 bit Service UUID followed by additional service data
if (record_length < 16) {
ESP_LOGV(TAG, "Record length too small for ESP_BLE_AD_TYPE_128SERVICE_DATA");
break;
}
this->service_data_uuid_ = ESPBTUUID::from_raw(record);
if (record_length > 16)
this->service_data_ = std::string(reinterpret_cast<const char *>(record + 16), record_length - 16UL);
ServiceData data{};
data.uuid = ESPBTUUID::from_raw(record);
data.data.assign(record + 16UL, record + record_length);
this->service_datas_.push_back(data);
break;
}
default: {
@ -429,16 +481,6 @@ std::string ESPBTDevice::address_str() const {
return mac;
}
uint64_t ESPBTDevice::address_uint64() const { return ble_addr_to_uint64(this->address_); }
esp_ble_addr_type_t ESPBTDevice::get_address_type() const { return this->address_type_; }
int ESPBTDevice::get_rssi() const { return this->rssi_; }
const std::string &ESPBTDevice::get_name() const { return this->name_; }
const optional<int8_t> &ESPBTDevice::get_tx_power() const { return this->tx_power_; }
const optional<uint16_t> &ESPBTDevice::get_appearance() const { return this->appearance_; }
const optional<uint8_t> &ESPBTDevice::get_ad_flag() const { return this->ad_flag_; }
const std::vector<ESPBTUUID> &ESPBTDevice::get_service_uuids() const { return this->service_uuids_; }
const std::string &ESPBTDevice::get_manufacturer_data() const { return this->manufacturer_data_; }
const std::string &ESPBTDevice::get_service_data() const { return this->service_data_; }
const optional<ESPBTUUID> &ESPBTDevice::get_service_data_uuid() const { return this->service_data_uuid_; }
void ESP32BLETracker::dump_config() {
ESP_LOGCONFIG(TAG, "BLE Tracker:");
@ -479,8 +521,8 @@ void ESP32BLETracker::print_bt_device_info(const ESPBTDevice &device) {
ESP_LOGD(TAG, " Address Type: %s", address_type_s);
if (!device.get_name().empty())
ESP_LOGD(TAG, " Name: '%s'", device.get_name().c_str());
if (device.get_tx_power().has_value()) {
ESP_LOGD(TAG, " TX Power: %d", *device.get_tx_power());
for (auto &tx_power : device.get_tx_powers()) {
ESP_LOGD(TAG, " TX Power: %d", tx_power);
}
}

56
esphome/components/esp32_ble_tracker/esp32_ble_tracker.h
View File

@ -31,11 +31,18 @@ class ESPBTUUID {
esp_bt_uuid_t uuid_;
};
using adv_data_t = std::vector<uint8_t>;
struct ServiceData {
ESPBTUUID uuid;
adv_data_t data;
};
class ESPBLEiBeacon {
public:
ESPBLEiBeacon() { memset(&this->beacon_data_, 0, sizeof(this->beacon_data_)); }
ESPBLEiBeacon(const uint8_t *data);
static optional<ESPBLEiBeacon> from_manufacturer_data(const std::string &data);
static optional<ESPBLEiBeacon> from_manufacturer_data(const ServiceData &data);
uint16_t get_major() { return reverse_bits_16(this->beacon_data_.major); }
uint16_t get_minor() { return reverse_bits_16(this->beacon_data_.minor); }
@ -44,7 +51,6 @@ class ESPBLEiBeacon {
protected:
struct {
uint16_t manufacturer_id;
uint8_t sub_type;
uint8_t proximity_uuid[16];
uint16_t major;
@ -61,18 +67,33 @@ class ESPBTDevice {
uint64_t address_uint64() const;
esp_ble_addr_type_t get_address_type() const;
int get_rssi() const;
const std::string &get_name() const;
const optional<int8_t> &get_tx_power() const;
const optional<uint16_t> &get_appearance() const;
const optional<uint8_t> &get_ad_flag() const;
const std::vector<ESPBTUUID> &get_service_uuids() const;
const std::string &get_manufacturer_data() const;
const std::string &get_service_data() const;
const optional<ESPBTUUID> &get_service_data_uuid() const;
const optional<ESPBLEiBeacon> get_ibeacon() const {
return ESPBLEiBeacon::from_manufacturer_data(this->manufacturer_data_);
esp_ble_addr_type_t get_address_type() const { return this->address_type_; }
int get_rssi() const { return rssi_; }
const std::string &get_name() const { return this->name_; }
ESPDEPRECATED("Use get_tx_powers() instead")
optional<int8_t> get_tx_power() const {
if (this->tx_powers_.empty())
return {};
return this->tx_powers_[0];
}
const std::vector<int8_t> &get_tx_powers() const { return tx_powers_; }
const optional<uint16_t> &get_appearance() const { return appearance_; }
const optional<uint8_t> &get_ad_flag() const { return ad_flag_; }
const std::vector<ESPBTUUID> &get_service_uuids() const { return service_uuids_; }
const std::vector<ServiceData> &get_manufacturer_datas() const { return manufacturer_datas_; }
const std::vector<ServiceData> &get_service_datas() const { return service_datas_; }
optional<ESPBLEiBeacon> get_ibeacon() const {
for (auto &it : this->manufacturer_datas_) {
auto res = ESPBLEiBeacon::from_manufacturer_data(it);
if (res.has_value())
return *res;
}
return {};
}
protected:
@ -84,13 +105,12 @@ class ESPBTDevice {
esp_ble_addr_type_t address_type_{BLE_ADDR_TYPE_PUBLIC};
int rssi_{0};
std::string name_{};
optional<int8_t> tx_power_{};
std::vector<int8_t> tx_powers_{};
optional<uint16_t> appearance_{};
optional<uint8_t> ad_flag_{};
std::vector<ESPBTUUID> service_uuids_;
std::string manufacturer_data_{};
std::string service_data_{};
optional<ESPBTUUID> service_data_uuid_{};
std::vector<ServiceData> manufacturer_datas_{};
std::vector<ServiceData> service_datas_{};
};
class ESP32BLETracker;

31
esphome/components/xiaomi_ble/xiaomi_ble.cpp
View File

@ -63,22 +63,17 @@ bool parse_xiaomi_data_byte(uint8_t data_type, const uint8_t *data, uint8_t data
return false;
}
}
optional<XiaomiParseResult> parse_xiaomi(const esp32_ble_tracker::ESPBTDevice &device) {
if (!device.get_service_data_uuid().has_value()) {
// ESP_LOGVV(TAG, "Xiaomi no service data");
return {};
}
if (!device.get_service_data_uuid()->contains(0x95, 0xFE)) {
bool parse_xiaomi_service_data(XiaomiParseResult &result, const esp32_ble_tracker::ServiceData &service_data) {
if (!service_data.uuid.contains(0x95, 0xFE)) {
// ESP_LOGVV(TAG, "Xiaomi no service data UUID magic bytes");
return {};
return false;
}
const auto *raw = reinterpret_cast<const uint8_t *>(device.get_service_data().data());
const auto raw = service_data.data;
if (device.get_service_data().size() < 14) {
if (raw.size() < 14) {
// ESP_LOGVV(TAG, "Xiaomi service data too short!");
return {};
return false;
}
bool is_lywsdcgq = (raw[1] & 0x20) == 0x20 && raw[2] == 0xAA && raw[3] == 0x01;
@ -88,10 +83,9 @@ optional<XiaomiParseResult> parse_xiaomi(const esp32_ble_tracker::ESPBTDevice &d
if (!is_lywsdcgq && !is_hhccjcy01 && !is_lywsd02 && !is_cgg1) {
// ESP_LOGVV(TAG, "Xiaomi no magic bytes");
return {};
return false;
}
XiaomiParseResult result;
result.type = XiaomiParseResult::TYPE_HHCCJCY01;
if (is_lywsdcgq) {
result.type = XiaomiParseResult::TYPE_LYWSDCGQ;
@ -111,7 +105,7 @@ optional<XiaomiParseResult> parse_xiaomi(const esp32_ble_tracker::ESPBTDevice &d
const uint8_t *raw_data = &raw[raw_offset];
uint8_t data_offset = 0;
uint8_t data_length = device.get_service_data().size() - raw_offset;
uint8_t data_length = raw.size() - raw_offset;
bool success = false;
while (true) {
@ -136,6 +130,15 @@ optional<XiaomiParseResult> parse_xiaomi(const esp32_ble_tracker::ESPBTDevice &d
data_offset += 3 + datapoint_length;
}
return success;
}
optional<XiaomiParseResult> parse_xiaomi(const esp32_ble_tracker::ESPBTDevice &device) {
XiaomiParseResult result;
bool success = false;
for (auto &service_data : device.get_service_datas()) {
if (parse_xiaomi_service_data(result, service_data))
success = true;
}
if (!success)
return {};
return result;

1
esphome/core/helpers.h
View File

@ -158,6 +158,7 @@ ParseOnOffState parse_on_off(const char *str, const char *on = nullptr, const ch
// Encode raw data to a human-readable string (for debugging)
std::string hexencode(const uint8_t *data, uint32_t len);
template<typename T> std::string hexencode(const T &data) { return hexencode(data.data(), data.size()); }
// https://stackoverflow.com/questions/7858817/unpacking-a-tuple-to-call-a-matching-function-pointer/7858971#7858971
template<int...> struct seq {}; // NOLINT