Chave de alimentação USB habilitada para Alexa

Ferramentas e máquinas necessárias

	Impressora 3D (genérica)
	Ferro de soldar (genérico)

Aplicativos e serviços online

	Amazon Alexa Skills Kit
	Tinamous
	Amazon Web Services AWS Lambda

Sobre este projeto

Antecedentes

Casos de uso

• Luzes alimentadas por USB

• Kindle Fire / Chrome cast sticks (especialmente em quartos de crianças para impedi-los de assistir TV)

• umidificadores USB

• Echo Dot (fazer o Alexa desligar-se durante a noite? ou apenas reiniciar o dispositivo)

• Placas de desenvolvimento. Precisa reiniciar esse projeto porque seus códigos entraram em um loop infinito?

• Dispositivos que são difíceis de acessar, mas precisam ser reiniciados ocasionalmente (ou seja, sensores no loft).

• Dispositivos instalados nas instalações do cliente onde queremos garantir que está alimentado (medindo o consumo de corrente e a tensão de entrada)

Hardware

Gabinete

• Com ou sem compartimento de bateria.

• Com ou sem pés (também conhecido como orifícios de montagem para permitir que a caixa seja fixada a uma superfície).

Conectando-se ao Tinamous

Etapa 1

Etapa 2

Etapa 3

Etapa 4

  #define SECRET_SSID "Seu SSID" #define SECRET_PASS "Sua senha SSIDs" / ************************** Tinamous MQTT Setup *********************************** / # define MQTT_SERVER " .tinamous.com" #define MQTT_SERVERPORT 8883 #define MQTT_USERNAME "UsbSwitch. " # define MQTT_PASSWORD "Sua senha vai aqui." # Define MQTT_CLIENT_ID "UsbSwitch" #define DEVICE_USERNAME "UsbSwitch"  

Etapa 5

  / ************************** Configuração do MQTT Tinamous *************** ******************* / # define MQTT_SERVER "AlexaExample.tinamous.com" #define MQTT_SERVERPORT 8883 #define MQTT_USERNAME "UsbSwitch.AlexaExample" #define MQTT_PASSWORD "Minha senha supersecreta que totalmente não é Passw0rd .... "# define MQTT_CLIENT_ID" UsbSwitch "#define DEVICE_USERNAME" UsbSwitch " 

Etapa 6

  WiFiSSLClient networkClient; MQTTClient mqttClient (4096);  

  mqttClient.begin (MQTT_SERVER, MQTT_SERVERPORT, networkClient); // Gerencia as mensagens recebidas. mqttClient.onMessage (messageReceived);  

  if (! mqttClient.connect (MQTT_CLIENT_ID, MQTT_USERNAME, MQTT_PASSWORD)) {if (mqttClient.lastError () ==LWMQTT_CONNECTION_DENIED) {// Este erro ocorre porque seu nome de usuário ou senha está errado} if (mqttClient} if. lastError () ==-6) {// Este erro é mais provável porque você não adicionou o certificado SSL. } // Força um atraso antes de tentar novamente o atraso de conexão (10000); return false;} // Conexão bem-sucedida. Agora assine o tópico mqttClient.subscribe ("/ Tinamous / V1 / Status.To /" DEVICE_USERNAME);  

A habilidade de casa inteligente Tinamous para Alexa

• Vinculação de contas

• Descoberta

• Relatório de estado

• Controle de energia

Vinculação de conta:

Descoberta:

Relatório de estado

Controle de potência

Criação da função AWS Lambda:

Criando a habilidade no console Alexa:

Sucesso!

Depuração de habilidades e dicas

• Avoid most things other than alpha-numerics in your endpointID's (I used * at one stage and everything broke, but not in an obvious way, however # was fine. Go figure!).

• Log everything. Check for logs when you've invoked your skill. No log then it's probably authentication, or your skill isn't authorized for the Lambda expression.

• Use matching AWS and Alexa email accounts.

• Keep the Lambda in the same region as the skill (Ireland for UK skills).

• If your skill is invoked but Alexa isn't responding to it (i.e. not listing devices), your response format is probably wrong.

• If you don't want to use your day to day Alexa account you can use Amazon households to add a second adult account. Note however this appears to be limited to 2 adults, and you can't change it without an epic delay.

• You can ask "Alexa, Switch Profiles" to switch between your developer and regular profiles.

• I hope with the redesign of the Alexa Console some better debugging information will be available. However right now all I see is bigger boxes and a little better validation. Some logs are available but they are just success logs. aka management level feel good metrics, and delayed by 36 hours which isn't helpful for debugging!

One Skill, Any (IoT) Thing!

Código

• AlexaUsbSwitcher.ino
• TinamousMQTTClient.ino
• UsbControl.ino
• WiFiClient.ino
• Secrets.h

AlexaUsbSwitcher.inoArduino

#include #include #include #include // Provide your own Secrets.h with WiFi and Tinamous definitions in it.#include "Secrets.h"// ================================/*#define MAX_USB_PORTS 2// 2 Port board.int led_pin[MAX_USB_PORTS][2] ={{A5, A6},{0,1}};int switch_pin[] ={A0, A1};// Usb switch B channel -> pin 5 ==USB1int usb_enable_pin[] ={2, 5};int usb_fault_pin[] ={3, 4};bool usb_port_state[] ={false, false};bool usb_power_mode[] ={0, 0, 1, 1};*/// ---------------------------------// 4 Port board.#define MAX_USB_PORTS 4// The 2 port board has bi-color LEDs, 4 port doesn't so use same pin......// LEDs:TX, Rx, D7, D6 (1-4)int led_pin[MAX_USB_PORTS][2] ={{14, 14}, {13,13}, {7,7}, {6,6}};int switch_pin[] ={A0, A1, A2, A3};// USB Enable pins, D1, D3, D4, D5 (not in that order)int usb_enable_pin[] ={5, 4, 1, 3};// Single fault pin (D2)int usb_fault_pin[] ={2, 2, 2, 2};bool usb_port_state[] ={false, false, false, false};// Mode:0 - Switch off as requested.// Mode:1 - Switch off, then on after a delay (useful for LED lights that have touch controls).int usb_power_mode[] ={1, 0, 0, 0};// ================================// Automation options.// time (millis) that the USB port should be switched on/off at.// zero indicates ignore.unsigned long usb_power_switch_on_at[] ={0, 0, 0, 0};// Set> 0 to get processed on first loop.// Side effect is switching them off that those in smart power // mode will schedule to come back on again).unsigned long usb_power_switch_off_at[] ={1, 1, 1, 1};// Current monitor INA219Adafruit_INA219 ina219;// Flag to indicate if one or more USB ports has a fault.bool has_usb_fault =false;// Measured power .float shunt_voltage =0;float bus_voltage =0;float current_mA =0;float load_voltage =0;float power_mW =0;// Min/max float max_current_mA =0;float max_busvoltage =0;float min_busvoltage =20;// track power usage.unsigned long last_measurement_time =0;bool power_failed =false;bool over_current =false;// MQTT publishing.// Probably want it quicker when powering devices.// or slower when not!int update_interval_seconds =20;unsigned long next_message_send_at =0;// =================================================// Main setup entry point// =================================================void setup() { pinMode(LED_BUILTIN, OUTPUT); digitalWrite(LED_BUILTIN, HIGH); for (int channel=0; channel MAX_USB_PORTS) { return; } // Light up the LED (1..4) based on the setup progress. SetLeds(stage-1 , true, true);}// ===================================================// Main Loop// ===================================================void loop() { // 4 port device, Debug LED is port 4 LED. // if any port 4 is on, then don't switch off the LED. // with all 4 ports off, the debug LED can blink as it likes... if (!hasPoweredPorts()) { digitalWrite(LED_BUILTIN, LOW); } // Check for a fault. bool faulted =false; for (int channel =0; channel  max_current_mA) { max_current_mA =current_mA; } if (bus_voltage> max_busvoltage) { max_busvoltage =bus_voltage; } if (bus_voltage  4.5) { Serial.print("External power restored. Bus voltage:"); Serial.print(bus_voltage); Serial.println(" V"); publishTinamousStatus("External power has been restored."); power_failed =false; } if (bus_voltage <4.2 &&!power_failed) { Serial.print("External power failed! Bus voltage:"); Serial.print(bus_voltage); Serial.println(" V."); publishTinamousStatus("External power lost!"); power_failed =true; } if (over_current &¤t_mA <1500) { publishTinamousStatus("Current fault cleared!"); over_current =false; } if (current_mA> 2000 &&!over_current) { // Overload! publishTinamousStatus("Over Current!"); over_current =true; } }void printPowerWide() { Serial.print("Bus Voltage:\t"); Serial.print(bus_voltage); Serial.print(" V\t"); Serial.print("Current:\t"); Serial.print(current_mA); Serial.print(" mA\t"); Serial.print("Max Current:\t"); Serial.print(max_current_mA); Serial.print(" mA\t"); Serial.print("Min Voltage:\t"); Serial.print(min_busvoltage); Serial.print(" V\t"); Serial.print("Max Voltage:\t"); Serial.print(max_busvoltage); Serial.print(" V\t"); Serial.println();}void printPowerSkinny() { Serial.print(bus_voltage); Serial.print ("\ t"); Serial.print(current_mA); Serial.print("\t\t"); Serial.print(max_current_mA); Serial.print("\t\t"); Serial.print(min_busvoltage); Serial.print ("\ t"); Serial.print(max_busvoltage); Serial.print ("\ t"); Serial.print("["); for (int channel=0; channel next_message_send_at) { Serial.println("------------------------"); Serial.println("MQTT publish measurements"); if (power_failed) { // reduce how often we send when the power // has failed to preserve battery power. sentNextPublishAt(update_interval_seconds * 10); } else { sentNextPublishAt(update_interval_seconds); } // And do one as senml... String senml ="{'e':["; // Voltage senml =senml + "{'n':'busVoltage'"; senml =senml + ", 'v':"; senml =senml + String(bus_voltage); senml =senml + ", 'u':'V'}"; // Max voltage senml =senml + ",{'n':'maxBusVoltage'"; senml =senml + ", 'v':"; senml =senml + String(max_busvoltage); senml =senml + ", 'u':'V'}"; // Min voltage senml =senml + ",{'n':'minBusVoltage'"; senml =senml + ", 'v':"; senml =senml + String(min_busvoltage); senml =senml + ", 'u':'V'}"; // Current senml =senml + ",{'n':'Current'"; senml =senml + ", 'v':"; senml =senml + String(current_mA); senml =senml + ", 'u':'mA'}"; // Max current senml =senml + ",{'n':'MaxCurrent'"; senml =senml + ", 'v':'"; senml =senml + String(max_current_mA); senml =senml + "', 'u':'mA'}"; // mAh consumed... senml =senml + ",{'n':'mAh'"; senml =senml + ", 'v':"; senml =senml + String(0); // TODO! senml =senml + ", 'u':'mAh'}"; senml =senml + ",{'n':'powerState"; senml =senml + "', 'bv':"; if (isPowered()) { senml =senml + "true"; } else { senml =senml + "false"; } senml =senml + "}"; for (int channel=0; channel 0 &&onAt  0 &&offAt  
TinamousMQTTClient.inoArduino 
 This file handled the MQTT connectivity (i.e. it's the bit that responds to Alexa commands).
// ======================================// Tinamous connectivity via MQTT// ======================================#include #include #include "secrets.h"// WiFi and MQTT settings in Secrets.h// Be sure to use WiFiSSLClient for an SSL connection.// for a non ssl (port 1883) use regular WiFiClient.//WiFiClient networkClient; WiFiSSLClient networkClient; // https://github.com/256dpi/arduino-mqtt// Specifying 4096 bytes buffer sizeMQTTClient mqttClient(4096); // If we have been connected since powered up bool was_connected =false;String senml ="";unsigned long nextSendMeasurementsAt =0;// =================================================// Setup the MQTT connection information// =================================================bool setupMqtt() { senml.reserve(4096); Serial.print("Connecting to Tinamous MQTT Server on port:"); Serial.println(MQTT_SERVERPORT); Serial.print("Server:"); Serial.println(MQTT_SERVER); mqttClient.begin(MQTT_SERVER, MQTT_SERVERPORT, networkClient); // Handle received messages. mqttClient.onMessage(messageReceived); connectToMqttServer();}// =================================================// Connect to the MQTT server. This can be called // repeatedly and will be ignored if already connected// =================================================bool connectToMqttServer() { if (mqttClient.connected()) { return true; } Serial.println("Reconnecting...."); Serial.println("checking wifi..."); if (WiFi.status() !=WL_CONNECTED) { Serial.print("WiFi Not Connected. Status:"); Serial.print(WiFi.status(), HEX); Serial.println (); atraso (10000); return false; } Serial.println("Connecting to MQTT Server..."); if (!mqttClient.connect(MQTT_CLIENT_ID, MQTT_USERNAME, MQTT_PASSWORD)) { Serial.println("Failed to connect to MQTT Server."); Serial.print("Error:"); Serial.print(mqttClient.lastError()); Serial.print(", Return Code:"); Serial.print(mqttClient.returnCode()); Serial.println (); if (mqttClient.lastError() ==LWMQTT_CONNECTION_DENIED) { Serial.println("Access denied. Check your username and password. Username should be 'DeviceName.AccountName' e.g. MySensor.MyHome"); } if (mqttClient.lastError() ==-6) { Serial.println("Check your Arduino has the SSL Certificate loaded for Tinmaous.com"); // Load the Firmware Updater sketch onto the Arduino. // Use the Tools -> WiFi Firmware Updater utility } // Wait 10s before it gets re-tried. atraso (10000); return false; } Serial.println("Connected to Tinamous MQTT!"); mqttClient.subscribe("/Tinamous/V1/Status.To/" DEVICE_USERNAME); Serial.println("Subscribed to status.to topic."); // Say Hi. publishTinamousStatus("Hello! Usb switch is now connected. @ me with help for help."); was_connected =true; return true;} // =================================================// Loop for mqtt processing.// =================================================void mqttLoop() { // Call anyway, does nothing if already connected. connectToMqttServer(); mqttClient.loop(); }// =================================================// Publish a status message on the Tinamous timeline// =================================================void publishTinamousStatus(String message) { Serial.println("Status:" + message); mqttClient.publish("/Tinamous/V1/Status", message); }// =================================================// Publish measurements using the plain json format// =================================================void publishTinamousJsonMeasurements(String json) { Serial.println("Measurement:" + json); mqttClient.publish("/Tinamous/V1/Measurements/Json", json); }// =================================================// Publish measurements using senml json format// =================================================void publishTinamousSenMLMeasurements(String senml) { Serial.println("SenML Measurement:" + senml); mqttClient.publish("/Tinamous/V1/Measurements/SenML", senml); if (mqttClient.lastError() !=0) { Serial.print("MQTT Error:"); Serial.print(mqttClient.lastError()); Serial.println (); } Serial.println("Done.");}// =================================================// Message received from the MQTT server// =================================================void messageReceived(String &topic, String &payload) { Serial.println("Message from Tinamous on topic:" + topic + " - " + payload); // If it starts with @ it's a status message to this device. if (payload.startsWith("@")) { payload.toLowerCase(); if (handleStatusMessage(payload)) { Serial.println("@ me status message handled."); Retorna; } } // Didn't get an expected command, so the message was to us. // Publish a help message. publishTinamousStatus("Hello! Sorry I didn't understand the message. @ me with help for help.");} // =================================================// Message was a Status Post (probably Alexa)// =================================================bool handleStatusMessage(String payload) {char buffer[25]; // for 1..4 (maps to 0..3) for (int port =0; port  0) { Serial.print("Turn on port "); Serial.println(port); setUsb(port, true); return true; } sprintf(buffer, "turn off port-%01d", port + 1); if (payload.indexOf(buffer)> 0) { Serial.print("Turn off port "); Serial.println(port); setUsb(port, false); return true; } } // No port specified, turn on all. if (payload.indexOf("turn on")> 0) { allOn(); return true; } if (payload.indexOf("turn off")> 0) { allOff(); return true; } if (payload.indexOf("help")> 0) { Serial.println("Sending help..."); publishTinamousStatus( "Send a message to me (@" DEVICE_USERNAME ") then:" "'Turn on Port-1' to turn on usb port 1," "'Turn off Port-1' to turn off usb port 1," "'Turn on' to turn on all usb ports," "'Turn off' to turn off all usb ports," " \n* Port number can be 1, 2, 3 or 4." ); return true; } Serial.print("Unknown status message:"); Serial.println(payload); return false;}
 
UsbControl.inoArduino 
 This file is responsible for the iterations with the USB power switching.
// ======================================// USB Port power control// and indication.// ======================================// Determine if one or more of the ports is poweredbool hasPoweredPorts() { for (int channel =0; channel  
WiFiClient.inoArduino 
 This file deals with WiFi Connectivity
// ======================================// WiFi handling// ======================================#include "Secrets.h" char ssid[] =SECRET_SSID; char pass[] =SECRET_PASS; int status =WL_IDLE_STATUS; void setupWiFi() { Serial.println("Connecting to WiFi..."); // check for the presence of the shield:if (WiFi.status() ==WL_NO_SHIELD) { Serial.println("WiFi shield not present"); // don't continue:while (true); } // attempt to connect to WiFi network:while ( status !=WL_CONNECTED) { Serial.print("Attempting to connect to WPA SSID:"); Serial.println(ssid); // Connect to WPA/WPA2 network:status =WiFi.begin(ssid, pass); // aguarde 10 segundos pela conexão:delay (10000); } // you're connected now, so print out the data:Serial.println("You're connected to the network"); printCurrentNet(); printWiFiData();}// ---------------------------------------// WiFivoid printWiFiData() { // print your WiFi shield's IP address:IPAddress ip =WiFi.localIP(); Serial.print("IP Address:"); Serial.println(ip); Serial.println(ip); // print your MAC address:byte mac[6]; WiFi.macAddress(mac); Serial.print("MAC address:"); Serial.print(mac[5], HEX); Serial.print(":"); Serial.print(mac[4], HEX); Serial.print(":"); Serial.print(mac[3], HEX); Serial.print(":"); Serial.print(mac[2], HEX); Serial.print(":"); Serial.print(mac[1], HEX); Serial.print(":"); Serial.println(mac[0], HEX);}void printCurrentNet() { // print the SSID of the network you're attached to:Serial.print("SSID:"); Serial.println(WiFi.SSID()); // print the MAC address of the router you're attached to:byte bssid[6]; WiFi.BSSID(bssid); Serial.print("BSSID:"); Serial.print(bssid[5], HEX); Serial.print(":"); Serial.print(bssid[4], HEX); Serial.print(":"); Serial.print(bssid[3], HEX); Serial.print(":"); Serial.print(bssid[2], HEX); Serial.print(":"); Serial.print(bssid[1], HEX); Serial.print(":"); Serial.println(bssid[0], HEX); // print the received signal strength:long rssi =WiFi.RSSI(); Serial.print("signal strength (RSSI):"); Serial.println(rssi); // print the encryption type:byte encryption =WiFi.encryptionType(); Serial.print("Encryption Type:"); Serial.println(encryption, HEX); Serial.println();}String hostName ="www.google.com";void doPing() { Serial.print("Pinging "); Serial.print(hostName); Serial.print(":"); int pingResult =WiFi.ping(hostName); if (pingResult>=0) { Serial.print("SUCCESS! RTT ="); Serial.print(pingResult); Serial.println ("ms"); } else { Serial.print("FAILED! Error code:"); Serial.println(pingResult); }} void reconnectWiFi() { // attempt to reconnect to WiFi network if the connection was lost:while ( status !=WL_CONNECTED) { Serial.print("Attempting to connect to WPA SSID:"); Serial.println(ssid); // Connect to WPA/WPA2 network:status =WiFi.begin(ssid, pass); if (status ==WL_CONNECTED) { Serial.print("You're re-connected to the network"); printCurrentNet(); printWiFiData(); Retorna; } delay(5000); }} 
 
Secrets.hArduino 
 You need to update this with your own settings.
#define SECRET_SSID ""#define SECRET_PASS ""/************************* Tinamous MQTT Setup *********************************/#define MQTT_SERVER ".tinamous.com"#define MQTT_SERVERPORT 8883 #define MQTT_USERNAME "."#define MQTT_PASSWORD "The devices password"#define MQTT_CLIENT_ID "A random client id"#define DEVICE_USERNAME ""
 

Peças personalizadas e gabinetes

Esquemas

GitHub USB Power Switcher Repository