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102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
#include "xiaomi_miscale.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_miscale {
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static const char *const TAG = "xiaomi_miscale";
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void XiaomiMiscale::dump_config() {
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ESP_LOGCONFIG(TAG, "Xiaomi Miscale");
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LOG_SENSOR(" ", "Weight", this->weight_);
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}
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bool XiaomiMiscale::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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success = true;
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}
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return success;
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}
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optional<ParseResult> XiaomiMiscale::parse_header(const esp32_ble_tracker::ServiceData &service_data) {
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ParseResult result;
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if (!service_data.uuid.contains(0x1D, 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 XiaomiMiscale::parse_message(const std::vector<uint8_t> &message, ParseResult &result) {
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// exemple 1d18 a2 6036 e307 07 11 0f1f11
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// 1-2 Weight (MISCALE 181D)
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// 3-4 Years (MISCALE 181D)
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// 5 month (MISCALE 181D)
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// 6 day (MISCALE 181D)
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// 7 hour (MISCALE 181D)
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// 8 minute (MISCALE 181D)
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// 9 second (MISCALE 181D)
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const uint8_t *data = message.data();
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const int data_length = 10;
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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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// weight, 2 bytes, 16-bit unsigned integer, 1 kg
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const int16_t weight = uint16_t(data[1]) | (uint16_t(data[2]) << 8);
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if (data[0] == 0x22 || data[0] == 0xa2)
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result.weight = weight * 0.01f / 2.0f; // unit 'kg'
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else if (data[0] == 0x12 || data[0] == 0xb2)
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result.weight = weight * 0.01f * 0.6; // unit 'jin'
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else if (data[0] == 0x03 || data[0] == 0xb3)
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result.weight = weight * 0.01f * 0.453592; // unit 'lbs'
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return true;
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}
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bool XiaomiMiscale::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 Miscale (%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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return true;
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}
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} // namespace xiaomi_miscale
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} // namespace esphome
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#endif
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