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helios-kwl.h
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helios-kwl.h
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#pragma once
#include <numeric>
#include "esphome.h"
class HeliosKwlComponent : public PollingComponent, public UARTDevice {
private:
static constexpr uint8_t ADDRESS = 0x22;
static constexpr uint8_t MAINBOARD = 0x11;
static constexpr int TEMPERATURE[] = {
-74, -70, -66, -62, -59, -56, -54, -52, -50, -48, -47, -46, -44, -43, -42, -41, -40, -39, -38,
-37, -36, -35, -34, -33, -33, -32, -31, -30, -30, -29, -28, -28, -27, -27, -26, -25, -25, -24,
-24, -23, -23, -22, -22, -21, -21, -20, -20, -19, -19, -19, -18, -18, -17, -17, -16, -16, -16,
-15, -15, -14, -14, -14, -13, -13, -12, -12, -12, -11, -11, -11, -10, -10, -9, -9, -9, -8,
-8, -8, -7, -7, -7, -6, -6, -6, -5, -5, -5, -4, -4, -4, -3, -3, -3, -2, -2,
-2, -1, -1, -1, -1, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4,
4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10,
10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16,
17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 23, 23, 24,
24, 24, 25, 25, 26, 26, 27, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32,
33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 40, 40, 41, 41, 42, 43,
43, 44, 45, 45, 46, 47, 48, 48, 49, 50, 51, 52, 53, 53, 54, 55, 56, 57, 59,
60, 61, 62, 63, 65, 66, 68, 69, 71, 73, 75, 77, 79, 81, 82, 86, 90, 93, 97,
100, 100, 100, 100, 100, 100, 100, 100, 100};
public:
using Datagram = std::array<uint8_t, 6>;
HeliosKwlComponent(UARTComponent* parent, Sensor* fan_speed, Sensor* sensor_temperature_outside,
Sensor* sensor_temperature_exhaust, Sensor* sensor_temperature_inside,
Sensor* sensor_temperature_incoming, BinarySensor* power_state,
BinarySensor* bypass_state, BinarySensor* heating_indicator,
BinarySensor* fault_indicator, BinarySensor* service_reminder)
: PollingComponent(10 * 1000),
UARTDevice(parent),
m_fan_speed{fan_speed},
m_sensor_temperature_outside{sensor_temperature_outside},
m_sensor_temperature_exhaust{sensor_temperature_exhaust},
m_sensor_temperature_inside{sensor_temperature_inside},
m_sensor_temperature_incoming{sensor_temperature_incoming},
m_power_state{power_state},
m_bypass_state{bypass_state},
m_heating_indicator{heating_indicator},
m_fault_indicator{fault_indicator},
m_service_reminder{service_reminder} {}
void setup() override { ESP_LOGI("custom", "setup()"); }
void update() override {
if (const auto value = poll_register(0x32)) {
m_sensor_temperature_outside->publish_state(TEMPERATURE[*value]);
}
if (const auto value = poll_register(0x33)) {
m_sensor_temperature_exhaust->publish_state(TEMPERATURE[*value]);
}
if (const auto value = poll_register(0x34)) {
m_sensor_temperature_inside->publish_state(TEMPERATURE[*value]);
}
if (const auto value = poll_register(0x35)) {
m_sensor_temperature_incoming->publish_state(TEMPERATURE[*value]);
}
if (const auto value = poll_register(0x29)) {
m_fan_speed->publish_state(count_ones(*value));
}
if (const auto value = poll_register(0xA3)) {
m_power_state->publish_state(*value & (0x01 << 0));
m_bypass_state->publish_state(*value & (0x01 << 3));
m_heating_indicator->publish_state(*value & (0x01 << 5));
m_fault_indicator->publish_state(*value & (0x01 << 6));
m_service_reminder->publish_state(*value & (0x01 << 7));
}
}
void set_fan_speed(float speed) {
if (speed == 0.f) {
set_state_flag(0, false);
} else {
assert(speed >= 0.f && speed <= 8.f);
const uint8_t speed_byte = 0xFF >> (8 - static_cast<int>(speed * 8));
if (set_value(0x29, speed_byte)) {
ESP_LOGD("custom", "Wrote speed: %02x", speed_byte);
set_state_flag(0, true);
} else {
ESP_LOGE("custom", "Failed to set fan speed");
}
}
}
void set_state_flag(uint8_t bit, bool state) {
if (auto value = poll_register(0xA3)) {
if (state == ((*value >> bit) & 0x01)) {
ESP_LOGD("custom", "State flag already set");
} else {
if (state) {
*value |= 0x01 << bit;
} else {
*value &= ~(0x01 << bit);
}
if (set_value(0xA3, *value)) {
ESP_LOGD("custom", "Wrote state flag to: %x", *value);
} else {
ESP_LOGE("custom", "Failed to set state flag");
}
}
} else {
ESP_LOGE("custom", "Unable to poll register 0xA3");
}
}
private:
optional<uint8_t> poll_register(uint8_t address) {
// Flush read buffer
flush_read_buffer();
// Write
Datagram temp = {0x01, ADDRESS, MAINBOARD, 0x00, address};
temp[5] = checksum(temp.cbegin(), temp.cend());
write_array(temp);
flush();
// Read
if (const auto response = read_array<6>()) {
const auto& array = *response;
if (check_crc(array.cbegin(), array.cend())) {
if (array[1] == MAINBOARD && array[2] == ADDRESS && array[3] == address) {
return array[4];
} else {
const auto hex = format_hex_pretty(array.data(), array.size());
ESP_LOGE("custom", "Wrong response from mainboard: %s", hex.c_str());
}
} else {
const auto hex = format_hex_pretty(array.data(), array.size());
ESP_LOGE("custom", "Bad checksum for response: %s", hex.c_str());
}
}
return {};
}
bool set_value(uint8_t address, uint8_t value) {
Datagram temp = {0x01, ADDRESS, MAINBOARD, address, value};
temp[5] = checksum(temp.cbegin(), temp.cend());
// To the mainboard
int retry = 3;
do {
// Flush read buffer
flush_read_buffer();
// Write
write_array(temp);
flush();
} while (read() != temp[5] && retry-- > 0);
return retry >= 0;
}
void flush_read_buffer() {
// Flush read buffer and wait for the bus to be quiet for 10 ms
uint32_t last_time = millis();
while (millis() - last_time < 10) {
while (available()) {
read();
last_time = millis();
}
yield();
}
}
template <typename Iterator>
static bool check_crc(const Iterator begin, const Iterator end) {
const auto crc = checksum(begin, std::prev(end));
return *std::prev(end) == crc;
}
template <typename Iterator>
static uint8_t checksum(const Iterator begin, const Iterator end) {
return std::accumulate(begin, end, 0);
}
static uint8_t count_ones(uint8_t byte) {
static const uint8_t NIBBLE_LOOKUP[16] = {0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};
return NIBBLE_LOOKUP[byte & 0x0F] + NIBBLE_LOOKUP[byte >> 4];
}
private:
Sensor* m_fan_speed{nullptr};
Sensor* m_sensor_temperature_outside{nullptr};
Sensor* m_sensor_temperature_exhaust{nullptr};
Sensor* m_sensor_temperature_inside{nullptr};
Sensor* m_sensor_temperature_incoming{nullptr};
BinarySensor* m_power_state{nullptr};
BinarySensor* m_bypass_state{nullptr};
BinarySensor* m_heating_indicator{nullptr};
BinarySensor* m_fault_indicator{nullptr};
BinarySensor* m_service_reminder{nullptr};
};
constexpr int HeliosKwlComponent::TEMPERATURE[256];
class HeliosKwlSpeedOutput : public Component, public FloatOutput {
public:
HeliosKwlSpeedOutput(HeliosKwlComponent* component) : m_component{component} {}
void setup() override {}
void write_state(float state) override { m_component->set_fan_speed(state); }
private:
HeliosKwlComponent* m_component;
};
class HeliosKwlWinterModeOutput : public Component, public BinaryOutput {
public:
HeliosKwlWinterModeOutput(HeliosKwlComponent* component) : m_component{component} {}
void setup() override {}
void write_state(bool state) override { m_component->set_state_flag(3, state); }
private:
HeliosKwlComponent* m_component;
};