mirror of https://github.com/esphome/esphome.git
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#include "ezo.h"
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#include "esphome/core/log.h"
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#include "esphome/core/hal.h"
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namespace esphome {
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namespace ezo {
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static const char *const TAG = "ezo.sensor";
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static const uint16_t EZO_STATE_WAIT = 1;
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static const uint16_t EZO_STATE_SEND_TEMP = 2;
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static const uint16_t EZO_STATE_WAIT_TEMP = 4;
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void EZOSensor::dump_config() {
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LOG_SENSOR("", "EZO", this);
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LOG_I2C_DEVICE(this);
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if (this->is_failed())
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ESP_LOGE(TAG, "Communication with EZO circuit failed!");
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LOG_UPDATE_INTERVAL(this);
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}
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void EZOSensor::update() {
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if (this->state_ & EZO_STATE_WAIT) {
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ESP_LOGE(TAG, "update overrun, still waiting for previous response");
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return;
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}
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uint8_t c = 'R';
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this->write(&c, 1);
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this->state_ |= EZO_STATE_WAIT;
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this->start_time_ = millis();
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this->wait_time_ = 900;
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}
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void EZOSensor::loop() {
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uint8_t buf[21];
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if (!(this->state_ & EZO_STATE_WAIT)) {
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if (this->state_ & EZO_STATE_SEND_TEMP) {
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int len = sprintf((char *) buf, "T,%0.3f", this->tempcomp_);
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this->write(buf, len);
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this->state_ = EZO_STATE_WAIT | EZO_STATE_WAIT_TEMP;
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this->start_time_ = millis();
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this->wait_time_ = 300;
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}
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return;
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}
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if (millis() - this->start_time_ < this->wait_time_)
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return;
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buf[0] = 0;
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if (!this->read_bytes_raw(buf, 20)) {
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ESP_LOGE(TAG, "read error");
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this->state_ = 0;
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return;
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}
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switch (buf[0]) {
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case 1:
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break;
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case 2:
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ESP_LOGE(TAG, "device returned a syntax error");
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break;
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case 254:
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return; // keep waiting
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case 255:
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ESP_LOGE(TAG, "device returned no data");
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break;
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default:
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ESP_LOGE(TAG, "device returned an unknown response: %d", buf[0]);
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break;
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}
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if (this->state_ & EZO_STATE_WAIT_TEMP) {
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this->state_ = 0;
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return;
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}
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this->state_ &= ~EZO_STATE_WAIT;
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if (buf[0] != 1)
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return;
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// some sensors return multiple comma-separated values, terminate string after first one
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for (size_t i = 1; i < sizeof(buf) - 1; i++)
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if (buf[i] == ',')
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buf[i] = '\0';
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float val = parse_number<float>((char *) &buf[1], sizeof(buf) - 2).value_or(0);
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this->publish_state(val);
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}
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void EZOSensor::set_tempcomp_value(float temp) {
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this->tempcomp_ = temp;
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this->state_ |= EZO_STATE_SEND_TEMP;
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}
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} // namespace ezo
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} // namespace esphome
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