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57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// Datasheet https://wiki.dfrobot.com/A01NYUB%20Waterproof%20Ultrasonic%20Sensor%20SKU:%20SEN0313
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#include "a01nyub.h"
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#include "esphome/core/helpers.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace a01nyub {
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static const char *const TAG = "a01nyub.sensor";
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static const uint8_t MAX_DATA_LENGTH_BYTES = 4;
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void A01nyubComponent::loop() {
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uint8_t data;
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while (this->available() > 0) {
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if (this->read_byte(&data)) {
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buffer_.push_back(data);
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this->check_buffer_();
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}
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}
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}
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void A01nyubComponent::check_buffer_() {
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if (this->buffer_.size() >= MAX_DATA_LENGTH_BYTES) {
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size_t i;
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for (i = 0; i < this->buffer_.size(); i++) {
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// Look for the first packet
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if (this->buffer_[i] == 0xFF) {
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if (i + 1 + 3 < this->buffer_.size()) { // Packet is not complete
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return; // Wait for completion
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}
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uint8_t checksum = (this->buffer_[i] + this->buffer_[i + 1] + this->buffer_[i + 2]) & 0xFF;
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if (this->buffer_[i + 3] == checksum) {
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float distance = (this->buffer_[i + 1] << 8) + this->buffer_[i + 2];
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if (distance > 280) {
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float meters = distance / 1000.0;
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ESP_LOGV(TAG, "Distance from sensor: %f mm, %f m", distance, meters);
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this->publish_state(meters);
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} else {
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ESP_LOGW(TAG, "Invalid data read from sensor: %s", format_hex_pretty(this->buffer_).c_str());
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}
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}
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break;
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}
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}
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this->buffer_.clear();
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}
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}
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void A01nyubComponent::dump_config() {
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ESP_LOGCONFIG(TAG, "A01nyub Sensor:");
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LOG_SENSOR(" ", "Distance", this);
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}
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} // namespace a01nyub
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} // namespace esphome
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