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117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
#include "xiaomi_miscale2.h"
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#include "esphome/core/log.h"
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#ifdef ARDUINO_ARCH_ESP32
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namespace esphome {
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namespace xiaomi_miscale2 {
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static const char *const TAG = "xiaomi_miscale2";
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void XiaomiMiscale2::dump_config() {
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ESP_LOGCONFIG(TAG, "Xiaomi Miscale2");
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LOG_SENSOR(" ", "Weight", this->weight_);
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LOG_SENSOR(" ", "Impedance", this->impedance_);
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}
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bool XiaomiMiscale2::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
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if (device.address_uint64() != this->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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bool success = false;
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for (auto &service_data : device.get_service_datas()) {
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auto res = parse_header(service_data);
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if (!res.has_value()) {
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continue;
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}
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if (!(parse_message(service_data.data, *res))) {
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continue;
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}
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if (!(report_results(res, device.address_str()))) {
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continue;
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}
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if (res->weight.has_value() && this->weight_ != nullptr)
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this->weight_->publish_state(*res->weight);
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if (res->impedance.has_value() && this->impedance_ != nullptr)
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this->impedance_->publish_state(*res->impedance);
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success = true;
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}
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return success;
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}
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optional<ParseResult> XiaomiMiscale2::parse_header(const esp32_ble_tracker::ServiceData &service_data) {
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ParseResult result;
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if (!service_data.uuid.contains(0x1B, 0x18)) {
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ESP_LOGVV(TAG, "parse_header(): no service data UUID magic bytes.");
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return {};
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}
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return result;
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}
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bool XiaomiMiscale2::parse_message(const std::vector<uint8_t> &message, ParseResult &result) {
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// 2-3 Years (MISCALE 2 181B)
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// 4 month (MISCALE 2 181B)
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// 5 day (MISCALE 2 181B)
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// 6 hour (MISCALE 2 181B)
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// 7 minute (MISCALE 2 181B)
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// 8 second (MISCALE 2 181B)
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// 9-10 impedance (MISCALE 2 181B)
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// 11-12 weight (MISCALE 2 181B)
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const uint8_t *data = message.data();
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const int data_length = 13;
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if (message.size() != data_length) {
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ESP_LOGVV(TAG, "parse_message(): payload has wrong size (%d)!", message.size());
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return false;
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}
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bool is_Stabilized = ((data[1] & (1 << 5)) != 0) ? true : false;
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bool loadRemoved = ((data[1] & (1 << 7)) != 0) ? true : false;
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// weight, 2 bytes, 16-bit unsigned integer, 1 kg
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const int16_t weight = uint16_t(data[11]) | (uint16_t(data[12]) << 8);
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if (data[0] == 0x02)
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result.weight = weight * 0.01f / 2.0f; // unit 'kg'
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else if (data[0] == 0x03)
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result.weight = weight * 0.01f * 0.453592; // unit 'lbs'
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// impedance, 2 bytes, 16-bit
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const int16_t impedance = uint16_t(data[9]) | (uint16_t(data[10]) << 8);
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result.impedance = impedance;
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if (!is_Stabilized || loadRemoved || impedance == 0 || impedance >= 3000) {
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return false;
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}
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return true;
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}
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bool XiaomiMiscale2::report_results(const optional<ParseResult> &result, const std::string &address) {
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if (!result.has_value()) {
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ESP_LOGVV(TAG, "report_results(): no results available.");
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return false;
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}
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ESP_LOGD(TAG, "Got Xiaomi Miscale2 (%s):", address.c_str());
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if (result->weight.has_value()) {
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ESP_LOGD(TAG, " Weight: %.2fkg", *result->weight);
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}
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if (result->impedance.has_value()) {
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ESP_LOGD(TAG, " Impedance: %.0fohm", *result->impedance);
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}
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return true;
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}
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} // namespace xiaomi_miscale2
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} // namespace esphome
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#endif
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