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Fix AHT10 / AHT20 communication (#5198)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Theo Hussey
2023-12-12 23:28:59 +00:00
committed by GitHub
parent 259a6d52e1
commit 03baaa94a8
3 changed files with 51 additions and 21 deletions
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esphome/components/aht10/aht10.cpp
+34 -21
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@@ -21,36 +21,49 @@ namespace esphome {
namespace aht10 {
static const char *const TAG = "aht10";
static const uint8_t AHT10_CALIBRATE_CMD[] = {0xE1};
static const size_t SIZE_CALIBRATE_CMD = 3;
static const uint8_t AHT10_CALIBRATE_CMD[] = {0xE1, 0x08, 0x00};
static const uint8_t AHT20_CALIBRATE_CMD[] = {0xBE, 0x08, 0x00};
static const uint8_t AHT10_MEASURE_CMD[] = {0xAC, 0x33, 0x00};
static const uint8_t AHT10_DEFAULT_DELAY = 5; // ms, for calibration and temperature measurement
static const uint8_t AHT10_HUMIDITY_DELAY = 30; // ms
static const uint8_t AHT10_ATTEMPTS = 3; // safety margin, normally 3 attempts are enough: 3*30=90ms
static const uint8_t AHT10_CAL_ATTEMPTS = 10;
static const uint8_t AHT10_STATUS_BUSY = 0x80;
void AHT10Component::setup() {
ESP_LOGCONFIG(TAG, "Setting up AHT10...");
const uint8_t *calibrate_cmd;
switch (this->variant_) {
case AHT10Variant::AHT20:
calibrate_cmd = AHT20_CALIBRATE_CMD;
ESP_LOGCONFIG(TAG, "Setting up AHT20");
break;
case AHT10Variant::AHT10:
default:
calibrate_cmd = AHT10_CALIBRATE_CMD;
ESP_LOGCONFIG(TAG, "Setting up AHT10");
}
if (!this->write_bytes(0, AHT10_CALIBRATE_CMD, sizeof(AHT10_CALIBRATE_CMD))) {
if (this->write(calibrate_cmd, SIZE_CALIBRATE_CMD) != i2c::ERROR_OK) {
ESP_LOGE(TAG, "Communication with AHT10 failed!");
this->mark_failed();
return;
}
uint8_t data = 0;
if (this->write(&data, 1) != i2c::ERROR_OK) {
ESP_LOGD(TAG, "Communication with AHT10 failed!");
this->mark_failed();
return;
}
delay(AHT10_DEFAULT_DELAY);
if (this->read(&data, 1) != i2c::ERROR_OK) {
ESP_LOGD(TAG, "Communication with AHT10 failed!");
this->mark_failed();
return;
}
if (this->read(&data, 1) != i2c::ERROR_OK) {
ESP_LOGD(TAG, "Communication with AHT10 failed!");
this->mark_failed();
return;
uint8_t data = AHT10_STATUS_BUSY;
int cal_attempts = 0;
while (data & AHT10_STATUS_BUSY) {
delay(AHT10_DEFAULT_DELAY);
if (this->read(&data, 1) != i2c::ERROR_OK) {
ESP_LOGE(TAG, "Communication with AHT10 failed!");
this->mark_failed();
return;
}
++cal_attempts;
if (cal_attempts > AHT10_CAL_ATTEMPTS) {
ESP_LOGE(TAG, "AHT10 calibration timed out!");
this->mark_failed();
return;
}
}
if ((data & 0x68) != 0x08) { // Bit[6:5] = 0b00, NORMAL mode and Bit[3] = 0b1, CALIBRATED
ESP_LOGE(TAG, "AHT10 calibration failed!");
@@ -62,7 +75,7 @@ void AHT10Component::setup() {
}
void AHT10Component::update() {
if (!this->write_bytes(0, AHT10_MEASURE_CMD, sizeof(AHT10_MEASURE_CMD))) {
if (this->write(AHT10_MEASURE_CMD, sizeof(AHT10_MEASURE_CMD)) != i2c::ERROR_OK) {
ESP_LOGE(TAG, "Communication with AHT10 failed!");
this->status_set_warning();
return;
@@ -89,7 +102,7 @@ void AHT10Component::update() {
break;
} else {
ESP_LOGD(TAG, "ATH10 Unrealistic humidity (0x0), retrying...");
if (!this->write_bytes(0, AHT10_MEASURE_CMD, sizeof(AHT10_MEASURE_CMD))) {
if (this->write(AHT10_MEASURE_CMD, sizeof(AHT10_MEASURE_CMD)) != i2c::ERROR_OK) {
ESP_LOGE(TAG, "Communication with AHT10 failed!");
this->status_set_warning();
return;