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In this section we will modify our smart bulb ACS component in order to make it BACI compliant. BACI is a control interface specification we use for ACS at ALMA. For more details this document is available. There is also another useful tutorial here. BACI is fully available for C++ components only. Java and Python have partial BACI implementations. Because of this we will implement this component in C++.
From these different sources we can take some guidelines:
When we are defining actions, we must write its arguments and what it returns. Every asynchronous action must have "in ACS::CBvoid cb, in ACS:CBDescIn desc". Note that beside arguments there is also a word "in". Here is short explanation of all possibilities (from Advance CORBA programming with C++):
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This is the repository with all the code and external libraries needed: https://bitbucket.sco.alma.cl/users/fcaro/repos/acs-baci-smart-bulb. You should be able to insert your API credentials in the component's implementation and run this code as is.
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working_dir: /home/developer/workspace
prefix: ACSIOT
module: acsiot
component_name: TuyaBulbBaci
functions:
- 'void turnOn()'
- 'void turnOff()'
properties:
- 'readonly attribute ACS::ROboolean status' |
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#ifndef _TUYABULBBACI_IDL_
#define _TUYABULBBACI_IDL_
#pragma prefix "ACSIOT"
#include <baci.idl>
module acsiot {
interface TuyaBulbBaci : ACS::CharacteristicComponent {
void turnOn();
void turnOff();
readonly attribute ACS::ROboolean status;
};
};
#endif |
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...
TuyaBulbBaciImpl_OBJECTS = TuyaBulbBaciImpl hmac_sha256 sha256
TuyaBulbBaciImpl_LIBS = TuyaBulbBaciStubs baci ssl crypto
... |
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#ifndef _TUYABULBBACI_IMPL_H
#define _TUYABULBBACI_IMPL_H
#ifndef __cplusplus
#error This is a C++ include file and cannot be used from plain C
#endif
// Base component implementation, including container services and component lifecycle infrastructure
#include <baciCharacteristicComponentImpl.h>
#include <baciROboolean.h>
#include <baciDevIO.h>
// Skeleton interface for server implementation
#include <TuyaBulbBaciS.h>
// Extras
#include "httplib.h"
#include "hmac_sha256.h"
#include "json.hpp"
// Error definitions for catching and raising exceptions
template <class T> class TuyaBulbBaciDevIO;
class TuyaBulbBaciImpl : public virtual baci::CharacteristicComponentImpl, public virtual POA_acsiot::TuyaBulbBaci {
// This is for calling private function getStatus from TuyaBulbBaciDevIO object
friend TuyaBulbBaciDevIO<bool>;
public:
TuyaBulbBaciImpl(const ACE_CString& name, maci::ContainerServices* containerServices);
virtual ~TuyaBulbBaciImpl();
void turnOn();
void turnOff();
// This is the public function to check the BACI property value
virtual ACS::ROboolean_ptr status();
private:
const std::string api_region;
const std::string client_id;
const std::string api_secret;
const std::string device_id;
const std::string base_url;
std::string token;
// This is our BACI property
baci::ROboolean* m_status_p;
httplib::Result sendRequest(
const std::string uri,
const std::string action = "GET",
const std::map<std::string, std::string> headers_map = {},
const std::string headers_str = "",
const std::string body = "",
const std::string body_sha256 = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
const std::string version = "v1.0"
);
std::string getToken();
bool getStatus();
};
// DevIO template definition for TuyaBulbBaci
template <class T> class TuyaBulbBaciDevIO : public DevIO<T> {
public:
TuyaBulbBaciDevIO(TuyaBulbBaciImpl* component) :
component(component)
{};
virtual ~TuyaBulbBaciDevIO() {};
virtual bool initializeValue(){ return false; }
virtual T read(ACS::Time& timestamp) {
timestamp = ::getTimeStamp();
return component->getStatus();
}
virtual void write(const T& value, ACS::Time& timestamp) {
// no op, since status is a read only characteristic
}
protected:
TuyaBulbBaciImpl* component;
};
#endif |
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#define CPPHTTPLIB_OPENSSL_SUPPORT
#include <TuyaBulbBaciImpl.h>
#include <stdexcept>
// Extras
#define SHA256_HASH_SIZE 32
using json = nlohmann::json;
TuyaBulbBaciImpl::TuyaBulbBaciImpl(const ACE_CString& name, maci::ContainerServices* containerServices) : CharacteristicComponentImpl(name, containerServices),
api_region("us"),
client_id("..."),
api_secret("..."),
device_id("..."),
base_url("https://openapi.tuyaus.com"),
m_status_p(0)
{
std::cout << "Constructing TuyaBulbBaciImpl object." << std::endl;
token = getToken();
TuyaBulbBaciDevIO<bool>* m_booleanDevIO = new TuyaBulbBaciDevIO<bool>(this);
m_status_p = new baci::ROboolean(name + ":status", getComponent(), m_booleanDevIO);
CHARACTERISTIC_COMPONENT_PROPERTY(status, m_status_p);
// std::cout << "API Region: " << this->api_region << std::endl;
// std::cout << "Client ID: " << this->client_id << std::endl;
// std::cout << "API Secret: " << this->api_secret << std::endl;
// std::cout << "Device ID: " << this->device_id << std::endl;
// std::cout << "API Token: " << this->token << std::endl;
}
TuyaBulbBaciImpl::~TuyaBulbBaciImpl() {
if (m_status_p != 0) {
m_status_p->destroy();
m_status_p=0;
}
}
void TuyaBulbBaciImpl::turnOn() {
std::cout << "Turning smart bulb ON..." << std::endl;
// Set request parameters
const std::string uri = "/iot-03/devices/" + this->device_id + "/commands";
const std::string action = "POST";
const std::string headers_str = "";
const std::string body = "{\"commands\":[{\"code\":\"switch_led\",\"value\":true}]}";
const std::string body_sha256 = "8479c9c60cd5d531054c49333c7b361a9ce41b9b313ab8eb6bc9df4141f658ef";
std::map<std::string, std::string> headers_map;
headers_map = {
{"Content-type", "application/json"},
{"access_token", this->token}
};
// Send request and print response
httplib::Result response = this->sendRequest(uri, action, headers_map, headers_str, body, body_sha256);
// std::cout << "Response status:\n";
// std::cout << response->status << std::endl;
// std::cout << "Response body:\n";
// std::cout << response->body << std::endl;
// Check API response
if (response->status == 200) {
json body = json::parse(response->body);
if (body["success"].dump() == "true") {
std::cout << "Device turned ON successfully." << std::endl;
} else {
throw std::runtime_error("Error while turning smart bulb ON.\n");
}
}
}
void TuyaBulbBaciImpl::turnOff() {
std::cout << "Turning smart bulb OFF..." << std::endl;
// Set request parameters
const std::string uri = "/iot-03/devices/" + this->device_id + "/commands";
const std::string action = "POST";
const std::string headers_str = "";
const std::string body = "{\"commands\":[{\"code\":\"switch_led\",\"value\":false}]}";
const std::string body_sha256 = "c9df53ad98d9c9be68680613d9ece634a27f102c5e40c7b5f60c11f6b944b6a9";
std::map<std::string, std::string> headers_map;
headers_map = {
{"Content-type", "application/json"},
{"access_token", this->token}
};
// Send request and print response
httplib::Result response = this->sendRequest(uri, action, headers_map, headers_str, body, body_sha256);
// std::cout << "Response status:\n";
// std::cout << response->status << std::endl;
// std::cout << "Response body:\n";
// std::cout << response->body << std::endl;
// Check API response
if (response->status == 200) {
json body = json::parse(response->body);
if (body["success"].dump() == "true") {
std::cout << "Device turned OFF successfully." << std::endl;
} else {
throw std::runtime_error("Error while turning smart bulb OFF.\n");
}
}
}
httplib::Result TuyaBulbBaciImpl::sendRequest(
const std::string uri,
const std::string action,
const std::map<std::string, std::string> headers_map,
const std::string headers_str,
const std::string body,
const std::string body_sha256,
const std::string version
) {
// https://developer.tuya.com/en/docs/iot/api-request?id=Ka4a8uuo1j4t4
// https://developer.tuya.com/en/docs/iot/singnature?id=Ka43a5mtx1gsc
std::cout << "Sending request to Tuya API " << uri << std::endl;
// String stringToSign =
// HTTPMethod + "\n" +
// Content-SHA256 + "\n" +
// Headers + "\n" +
// Url
const std::string url = "/" + version + uri;
const std::string string_to_sign = action + "\n" + body_sha256 + "\n" + headers_str + "\n" + url;
// Get time in milliseconds since epoch, with 13 digits
std::time_t t = std::time(nullptr) * 1000;
// str = client_id + access_token + t + nonce + stringToSign
// sign = HMAC-SHA256(str, secret).toUpperCase()
std::string str_data;
if (this->token.empty()) {
str_data = this->client_id + std::to_string(t) + string_to_sign;
} else {
str_data = this->client_id + this->token + std::to_string(t) + string_to_sign;
}
// Allocate memory for the HMAC
std::vector<uint8_t> out(SHA256_HASH_SIZE);
// Call hmac-sha256 function and parse result to string stream
hmac_sha256(this->api_secret.data(), this->api_secret.size(), str_data.data(), str_data.size(),
out.data(), out.size());
std::stringstream ss_result;
for (uint8_t i : out) {
ss_result << std::hex << std::setfill('0') << std::setw(2) << (int)i;
}
// to uppercase
std::string sign = ss_result.str();
transform(sign.begin(), sign.end(), sign.begin(), ::toupper);
// Create base headers
httplib::Headers request_headers = {
{ "client_id", this->client_id },
{ "sign_method", "HMAC-SHA256" },
{ "sign", sign },
{ "t", std::to_string(t) }
};
// Add extra headers
std::map<std::string, std::string>::const_iterator it;
for (it = headers_map.begin(); it != headers_map.end(); it++) {
request_headers.insert({ it->first, it->second });
}
// Create HTTPS client
httplib::Client cli(this->base_url);
// Send request
if (action.compare("GET") == 0) {
return cli.Get(url.c_str(), request_headers);
} else {
return cli.Post(url.c_str(), request_headers, body.c_str(), "application/json");
}
}
std::string TuyaBulbBaciImpl::getToken() {
// https://openapi.tuyaus.com/v1.0/token?grant_type=1
const std::string uri = "/token?grant_type=1";
httplib::Result response = this->sendRequest(uri);
// Check API response
if (response->status == 200) {
json body = json::parse(response->body);
if (body["success"].dump() == "true") {
const std::string token = body["result"]["access_token"];
return token;
}
}
throw std::runtime_error("Error while getting API token.\n");
}
bool TuyaBulbBaciImpl::getStatus() {
// https://openapi.tuyaus.com/v1.0/iot-03/devices/{device_id}/status
const std::string uri = "/iot-03/devices/" + this->device_id + "/status";
std::map<std::string, std::string> headers_map;
headers_map = {
{"access_token", this->token}
};
// Send request and print response
httplib::Result response = this->sendRequest(uri, "GET", headers_map);
// std::cout << "Response status:\n";
// std::cout << response->status << std::endl;
// std::cout << "Response body:\n";
// std::cout << response->body << std::endl;
// Check API response
if (response->status == 200) {
json body = json::parse(response->body);
// Return status
if (body["success"].dump() == "true") {
if (body["result"][0]["value"].dump() == "true") {
return true;
} else {
return false;
}
}
}
throw std::runtime_error("Error while getting device status.\n");
}
ACS::ROboolean_ptr TuyaBulbBaciImpl::status () {
if(m_status_p == 0) {
return ACS::ROboolean::_nil();
}
ACS::ROboolean_var prop = ACS::ROboolean::_narrow(m_status_p->getCORBAReference());
return prop._retn();
}
/* --------------- [ MACI DLL support functions ] -----------------*/
#include <maciACSComponentDefines.h>
MACI_DLL_SUPPORT_FUNCTIONS(TuyaBulbBaciImpl)
/* ----------------------------------------------------------------*/ |
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from Acspy.Clients.SimpleClient import PySimpleClient
client = PySimpleClient()
bulb_comp = client.getComponent("TuyaBulbBaciCPP")
status = bulb_comp.status
bulb_comp.turnOn()
bulb_comp.status()
bulb_comp.turnOff()
bulb_comp.status() |
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>>> from Acspy.Clients.SimpleClient import PySimpleClient
>>>
>>> client = PySimpleClient()
>>> bulb_comp = client.getComponent("TuyaBulbBaciCPP")
>>> bulb_comp.status.get_sync()
(False, ACSErr.Completion(timeStamp=138772104611657330, type=0, code=0, previousError=[]))
>>> bulb_comp.turnOn()
>>> bulb_comp.status.get_sync()
(True, ACSErr.Completion(timeStamp=138772104679161260, type=0, code=0, previousError=[]))
>>> bulb_comp.turnOff()
>>> bulb_comp.status.get_sync()
(False, ACSErr.Completion(timeStamp=138772104807303050, type=0, code=0, previousError=[])) |
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<?xml version='1.0' encoding='ISO-8859-1'?>
<!--
- History:
- Wed May 06 09:02:21 UTC 2009 modified by jDAL
- Wed May 06 09:05:40 UTC 2009 modified by jDAL
-->
<TuyaBulbBaci xmlns="urn:schemas-cosylab-com:TuyaBulbBaci:1.0" xmlns:baci="urn:schemas-cosylab-com:BACI:1.0" xmlns:cdb="urn:schemas-cosylab-com:CDB:1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<status
default_timer_trig="1.0"
description="status for smart bulb device"
units="bit"
archive_min_int="0"
archive_max_int="1" />
</TuyaBulbBaci> |
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<?xml version="1.0" encoding="ISO-8859-1"?>
<xs:schema
targetNamespace="urn:schemas-cosylab-com:TuyaBulbBaci:1.0"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="urn:schemas-cosylab-com:TuyaBulbBaci:1.0"
xmlns:cdb="urn:schemas-cosylab-com:CDB:1.0"
xmlns:baci="urn:schemas-cosylab-com:BACI:1.0" elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:import namespace="urn:schemas-cosylab-com:CDB:1.0" schemaLocation="CDB.xsd"/>
<xs:import namespace="urn:schemas-cosylab-com:BACI:1.0" schemaLocation="BACI.xsd"/>
<xs:complexType name="TuyaBulbBaci">
<xs:complexContent>
<xs:extension base="baci:CharacteristicComponent">
<xs:sequence>
<xs:element name="status" type="baci:ROboolean" />
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="TuyaBulbBaci" type="TuyaBulbBaci"/>
</xs:schema> |