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mhsw-espurna/code/espurna/homeassistant.cpp

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/*
HOME ASSISTANT MODULE
Copyright (C) 2017-2019 by Xose Pérez <xose dot perez at gmail dot com>
*/
#include "homeassistant.h"
#if HOMEASSISTANT_SUPPORT
#include "light.h"
#include "mqtt.h"
#include "relay.h"
#include "rpc.h"
#include "sensor.h"
#include "utils.h"
#include "ws.h"
#include <Ticker.h>
#include <Schedule.h>
#include <ArduinoJson.h>
bool _ha_enabled = false;
bool _ha_send_flag = false;
// -----------------------------------------------------------------------------
// UTILS
// -----------------------------------------------------------------------------
// per yaml 1.1 spec, following scalars are converted to bool. we want the string, so quoting the output
// y|Y|yes|Yes|YES|n|N|no|No|NO |true|True|TRUE|false|False|FALSE |on|On|ON|off|Off|OFF
String _haFixPayload(const String& value) {
if (value.equalsIgnoreCase("y")
|| value.equalsIgnoreCase("n")
|| value.equalsIgnoreCase("yes")
|| value.equalsIgnoreCase("no")
|| value.equalsIgnoreCase("true")
|| value.equalsIgnoreCase("false")
|| value.equalsIgnoreCase("on")
|| value.equalsIgnoreCase("off")
) {
String temp;
temp.reserve(value.length() + 2);
temp = "\"";
temp += value;
temp += "\"";
return temp;
}
return value;
}
String _haFixName(String&& name) {
auto* ptr = const_cast<char*>(name.c_str());
while (*ptr != '\0') {
if (!isalnum(*ptr)) {
*ptr = '_';
}
++ptr;
}
return std::move(name);
}
#if (LIGHT_PROVIDER != LIGHT_PROVIDER_NONE) || (defined(ITEAD_SLAMPHER))
const String switchType("light");
#else
const String switchType("switch");
#endif
// -----------------------------------------------------------------------------
// Shared context object to store entity and entity registry data
// -----------------------------------------------------------------------------
struct ha_config_t {
static const size_t DEFAULT_BUFFER_SIZE = 2048;
ha_config_t(size_t size) :
jsonBuffer(size),
deviceConfig(jsonBuffer.createObject()),
root(jsonBuffer.createObject()),
name(getSetting("desc", getSetting("hostname", getIdentifier()))),
identifier(getIdentifier().c_str()),
version(getVersion().c_str()),
manufacturer(getManufacturer().c_str()),
device(getDevice().c_str())
{
deviceConfig.createNestedArray("identifiers").add(identifier);
deviceConfig["name"] = name.c_str();
deviceConfig["sw_version"] = version;
deviceConfig["manufacturer"] = manufacturer;
deviceConfig["model"] = device;
}
ha_config_t() : ha_config_t(DEFAULT_BUFFER_SIZE) {}
size_t size() { return jsonBuffer.size(); }
DynamicJsonBuffer jsonBuffer;
JsonObject& deviceConfig;
JsonObject& root;
String name;
const char* identifier;
const char* version;
const char* manufacturer;
const char* device;
};
// -----------------------------------------------------------------------------
// MQTT discovery
// -----------------------------------------------------------------------------
struct ha_discovery_t {
constexpr static const unsigned long SEND_TIMEOUT = 1000;
constexpr static const unsigned char SEND_RETRY = 5;
ha_discovery_t() :
_retry(SEND_RETRY)
{
#if SENSOR_SUPPORT
_messages.reserve(magnitudeCount() + relayCount());
#else
_messages.reserve(relayCount());
#endif
}
~ha_discovery_t() {
DEBUG_MSG_P(PSTR("[HA] Discovery %s\n"), empty() ? "OK" : "FAILED");
}
void add(String& topic, String& message) {
auto msg = mqtt_msg_t { std::move(topic), std::move(message) };
_messages.push_back(std::move(msg));
}
// We don't particulary care about the order since names have indexes?
// If we ever do, use iterators to reference elems and pop the String contents instead
mqtt_msg_t& next() {
return _messages.back();
}
void pop() {
_messages.pop_back();
}
const bool empty() const {
return !_messages.size();
}
bool retry() {
if (!_retry) return false;
return --_retry;
}
void prepareSwitches(ha_config_t& config);
#if SENSOR_SUPPORT
void prepareMagnitudes(ha_config_t& config);
#endif
Ticker timer;
std::vector<mqtt_msg_t> _messages;
unsigned char _retry;
};
std::unique_ptr<ha_discovery_t> _ha_discovery = nullptr;
void _haSendDiscovery() {
if (!_ha_discovery) return;
const bool connected = mqttConnected();
const bool retry = _ha_discovery->retry();
const bool empty = _ha_discovery->empty();
if (!connected || !retry || empty) {
_ha_discovery = nullptr;
return;
}
const unsigned long ts = millis();
do {
if (_ha_discovery->empty()) break;
auto& message = _ha_discovery->next();
if (!mqttSendRaw(message.topic.c_str(), message.message.c_str())) {
break;
}
_ha_discovery->pop();
// XXX: should not reach this timeout, most common case is the break above
} while (millis() - ts < ha_discovery_t::SEND_TIMEOUT);
mqttSendStatus();
if (_ha_discovery->empty()) {
_ha_discovery = nullptr;
} else {
// 2.3.0: Ticker callback arguments are not preserved and once_ms_scheduled is missing
// We need to use global discovery object to reschedule it
// Otherwise, this would've been shared_ptr from _haSend
_ha_discovery->timer.once_ms(ha_discovery_t::SEND_TIMEOUT, []() {
schedule_function(_haSendDiscovery);
});
}
}
// -----------------------------------------------------------------------------
// SENSORS
// -----------------------------------------------------------------------------
#if SENSOR_SUPPORT
void _haSendMagnitude(unsigned char index, JsonObject& config) {
config["name"] = _haFixName(getSetting("hostname", getIdentifier()) + String(" ") + magnitudeTopic(magnitudeType(index)));
config["state_topic"] = mqttTopic(magnitudeTopicIndex(index).c_str(), false);
config["unit_of_measurement"] = magnitudeUnits(index);
}
void ha_discovery_t::prepareMagnitudes(ha_config_t& config) {
// Note: because none of the keys are erased, use a separate object to avoid accidentally sending switch data
JsonObject& root = config.jsonBuffer.createObject();
for (unsigned char i=0; i<magnitudeCount(); i++) {
String topic = getSetting("haPrefix", HOMEASSISTANT_PREFIX) +
"/sensor/" +
getSetting("hostname", getIdentifier()) + "_" + String(i) +
"/config";
String message;
if (_ha_enabled) {
_haSendMagnitude(i, root);
root["uniq_id"] = getIdentifier() + "_" + magnitudeTopic(magnitudeType(i)) + "_" + String(i);
root["device"] = config.deviceConfig;
message.reserve(root.measureLength());
root.printTo(message);
}
add(topic, message);
}
}
#endif // SENSOR_SUPPORT
// -----------------------------------------------------------------------------
// SWITCHES & LIGHTS
// -----------------------------------------------------------------------------
void _haSendSwitch(unsigned char i, JsonObject& config) {
String name = _haFixName(getSetting("hostname", getIdentifier()));
if (relayCount() > 1) {
name += '_';
name += i;
}
config.set("name", name);
if (relayCount()) {
config["state_topic"] = mqttTopic(MQTT_TOPIC_RELAY, i, false);
config["command_topic"] = mqttTopic(MQTT_TOPIC_RELAY, i, true);
config["payload_on"] = relayPayload(PayloadStatus::On);
config["payload_off"] = relayPayload(PayloadStatus::Off);
config["availability_topic"] = mqttTopic(MQTT_TOPIC_STATUS, false);
config["payload_available"] = mqttPayloadStatus(true);
config["payload_not_available"] = mqttPayloadStatus(false);
}
#if LIGHT_PROVIDER != LIGHT_PROVIDER_NONE
if (i == 0) {
config["brightness_state_topic"] = mqttTopic(MQTT_TOPIC_BRIGHTNESS, false);
config["brightness_command_topic"] = mqttTopic(MQTT_TOPIC_BRIGHTNESS, true);
if (lightHasColor()) {
config["rgb_state_topic"] = mqttTopic(MQTT_TOPIC_COLOR_RGB, false);
config["rgb_command_topic"] = mqttTopic(MQTT_TOPIC_COLOR_RGB, true);
}
if (lightHasColor() || lightUseCCT()) {
config["color_temp_command_topic"] = mqttTopic(MQTT_TOPIC_MIRED, true);
config["color_temp_state_topic"] = mqttTopic(MQTT_TOPIC_MIRED, false);
}
if (lightChannels() > 3) {
config["white_value_state_topic"] = mqttTopic(MQTT_TOPIC_CHANNEL, 3, false);
config["white_value_command_topic"] = mqttTopic(MQTT_TOPIC_CHANNEL, 3, true);
}
}
#endif // LIGHT_PROVIDER != LIGHT_PROVIDER_NONE
}
void ha_discovery_t::prepareSwitches(ha_config_t& config) {
// Note: because none of the keys are erased, use a separate object to avoid accidentally sending magnitude data
JsonObject& root = config.jsonBuffer.createObject();
for (unsigned char i=0; i<relayCount(); i++) {
String topic = getSetting("haPrefix", HOMEASSISTANT_PREFIX) +
"/" + switchType +
"/" + getSetting("hostname", getIdentifier()) + "_" + String(i) +
"/config";
String message;
if (_ha_enabled) {
_haSendSwitch(i, root);
root["uniq_id"] = getIdentifier() + "_" + switchType + "_" + String(i);
root["device"] = config.deviceConfig;
message.reserve(root.measureLength());
root.printTo(message);
}
add(topic, message);
}
}
// -----------------------------------------------------------------------------
constexpr const size_t HA_YAML_BUFFER_SIZE = 1024;
void _haSwitchYaml(unsigned char index, JsonObject& root) {
String output;
output.reserve(HA_YAML_BUFFER_SIZE);
JsonObject& config = root.createNestedObject("config");
config["platform"] = "mqtt";
_haSendSwitch(index, config);
if (index == 0) output += "\n\n" + switchType + ":";
output += "\n";
bool first = true;
for (auto kv : config) {
if (first) {
output += " - ";
first = false;
} else {
output += " ";
}
output += kv.key;
output += ": ";
if (strncmp(kv.key, "payload_", strlen("payload_")) == 0) {
output += _haFixPayload(kv.value.as<String>());
} else {
output += kv.value.as<String>();
}
output += "\n";
}
output += " ";
root.remove("config");
root["haConfig"] = output;
}
#if SENSOR_SUPPORT
void _haSensorYaml(unsigned char index, JsonObject& root) {
String output;
output.reserve(HA_YAML_BUFFER_SIZE);
JsonObject& config = root.createNestedObject("config");
config["platform"] = "mqtt";
_haSendMagnitude(index, config);
if (index == 0) output += "\n\nsensor:";
output += "\n";
bool first = true;
for (auto kv : config) {
if (first) {
output += " - ";
first = false;
} else {
output += " ";
}
String value = kv.value.as<String>();
value.replace("%", "'%'");
output += kv.key;
output += ": ";
output += value;
output += "\n";
}
output += " ";
root.remove("config");
root["haConfig"] = output;
}
#endif // SENSOR_SUPPORT
void _haGetDeviceConfig(JsonObject& config) {
config.createNestedArray("identifiers").add(getIdentifier().c_str());
config["name"] = getSetting("desc", getSetting("hostname", getIdentifier()));
config["manufacturer"] = getManufacturer().c_str();
config["model"] = getDevice().c_str();
config["sw_version"] = getVersion().c_str();
}
void _haSend() {
// Pending message to send?
if (!_ha_send_flag) return;
// Are we connected?
if (!mqttConnected()) return;
// Are we still trying to send discovery messages?
if (_ha_discovery) return;
DEBUG_MSG_P(PSTR("[HA] Preparing MQTT discovery message(s)...\n"));
// Get common device config / context object
ha_config_t config;
// We expect only one instance, create now
_ha_discovery = std::make_unique<ha_discovery_t>();
// Prepare all of the messages and send them in the scheduled function later
_ha_discovery->prepareSwitches(config);
#if SENSOR_SUPPORT
_ha_discovery->prepareMagnitudes(config);
#endif
_ha_send_flag = false;
schedule_function(_haSendDiscovery);
}
void _haConfigure() {
const bool enabled = getSetting("haEnabled", 1 == HOMEASSISTANT_ENABLED);
_ha_send_flag = (enabled != _ha_enabled);
_ha_enabled = enabled;
// https://github.com/xoseperez/espurna/issues/1273
// https://gitter.im/tinkerman-cat/espurna?at=5df8ad4655d9392300268a8c
// TODO: ensure that this is called before _lightConfigure()
// in case useCSS value is ever cached by the lights module
#if LIGHT_PROVIDER != LIGHT_PROVIDER_NONE
if (enabled) {
if (getSetting("useCSS", 1 == LIGHT_USE_CSS)) {
setSetting("useCSS", 0);
}
}
#endif
_haSend();
}
#if WEB_SUPPORT
bool _haWebSocketOnKeyCheck(const char * key, JsonVariant& value) {
return (strncmp(key, "ha", 2) == 0);
}
void _haWebSocketOnVisible(JsonObject& root) {
root["haVisible"] = 1;
}
void _haWebSocketOnConnected(JsonObject& root) {
root["haPrefix"] = getSetting("haPrefix", HOMEASSISTANT_PREFIX);
root["haEnabled"] = getSetting("haEnabled", 1 == HOMEASSISTANT_ENABLED);
}
void _haWebSocketOnAction(uint32_t client_id, const char * action, JsonObject& data) {
if (strcmp(action, "haconfig") == 0) {
ws_on_send_callback_list_t callbacks;
#if SENSOR_SUPPORT
callbacks.reserve(magnitudeCount() + relayCount());
#else
callbacks.reserve(relayCount());
#endif // SENSOR_SUPPORT
{
for (unsigned char idx=0; idx<relayCount(); ++idx) {
callbacks.push_back([idx](JsonObject& root) {
_haSwitchYaml(idx, root);
});
}
}
#if SENSOR_SUPPORT
{
for (unsigned char idx=0; idx<magnitudeCount(); ++idx) {
callbacks.push_back([idx](JsonObject& root) {
_haSensorYaml(idx, root);
});
}
}
#endif // SENSOR_SUPPORT
if (callbacks.size()) wsPostSequence(client_id, std::move(callbacks));
}
}
#endif // WEB_SUPPORT
#if TERMINAL_SUPPORT
void _haInitCommands() {
terminalRegisterCommand(F("HA.CONFIG"), [](const terminal::CommandContext&) {
for (unsigned char idx=0; idx<relayCount(); ++idx) {
DynamicJsonBuffer jsonBuffer(1024);
JsonObject& root = jsonBuffer.createObject();
_haSwitchYaml(idx, root);
DEBUG_MSG(root["haConfig"].as<String>().c_str());
}
#if SENSOR_SUPPORT
for (unsigned char idx=0; idx<magnitudeCount(); ++idx) {
DynamicJsonBuffer jsonBuffer(1024);
JsonObject& root = jsonBuffer.createObject();
_haSensorYaml(idx, root);
DEBUG_MSG(root["haConfig"].as<String>().c_str());
}
#endif // SENSOR_SUPPORT
DEBUG_MSG("\n");
terminalOK();
});
terminalRegisterCommand(F("HA.SEND"), [](const terminal::CommandContext&) {
setSetting("haEnabled", "1");
_haConfigure();
#if WEB_SUPPORT
wsPost(_haWebSocketOnConnected);
#endif
terminalOK();
});
terminalRegisterCommand(F("HA.CLEAR"), [](const terminal::CommandContext&) {
setSetting("haEnabled", "0");
_haConfigure();
#if WEB_SUPPORT
wsPost(_haWebSocketOnConnected);
#endif
terminalOK();
});
}
#endif
// -----------------------------------------------------------------------------
void haSetup() {
_haConfigure();
#if WEB_SUPPORT
wsRegister()
.onVisible(_haWebSocketOnVisible)
.onConnected(_haWebSocketOnConnected)
.onAction(_haWebSocketOnAction)
.onKeyCheck(_haWebSocketOnKeyCheck);
#endif
#if TERMINAL_SUPPORT
_haInitCommands();
#endif
// On MQTT connect check if we have something to send
mqttRegister([](unsigned int type, const char * topic, const char * payload) {
if (type == MQTT_CONNECT_EVENT) schedule_function(_haSend);
if (type == MQTT_DISCONNECT_EVENT) _ha_send_flag = _ha_enabled;
});
// Main callbacks
espurnaRegisterReload(_haConfigure);
}
#endif // HOMEASSISTANT_SUPPORT