Added: OTAProxy

src/FabReader_v2/README.txt

@@ -0,0 +1,20 @@
+## Protocol:
+READERID is 5 Digits
+1. Hello: Topic="fabreader", Payload="READERID"
+1. Start: Topic="fabreader/READERID/startOTA", Payload=NULL
+1. Request: Topic="fabreader/READERID/requestOTA", Payload=256 Bytes APDU Command
+1. Response: Topic="fabreader/READERID/responseOTA", Payload=256 Bytes APDU Response
+1. Stop: Topic="fabreader/READERID/stopOTA", Payload=NULL
+1. Cancel: Topic="fabreader/READERID/cancelOTA", Payload=NULL
+
+## Procedure:
+After Start Reader sends "Hello".
+
+After new Card is on Reader:
+"Start" -> to Server
+"Request" <- from Server
+"Response" -> to Server
+
+Repeat Request and Response until:
+"Stop" <- from Server
+"Cancel" -> to Server

src/FabReader_v2/src/Config.cpp

@@ -7,12 +7,15 @@ Config::Config()
     EEPROM.begin(512);
 }
 
-Config::Config(int ID, char broker[], char username[], char password[])
+Config::Config(int ID, char mqtt_broker[], int mqtt_port, char mqtt_username[], char mqtt_password[], char wlan_ssid[], char wlan_password[])
 {
-    this->Data.ID = ID;
+    Data.ID = ID;
-    strcpy(this->Data.MQTT_Broker, broker);
+    strcpy(Data.MQTT_Broker, mqtt_broker);
-    strcpy(this->Data.MQTT_Username, username);
+    Data.MQTT_Port = mqtt_port;
-    strcpy(this->Data.MQTT_Password, password);
+    strcpy(Data.MQTT_Username, mqtt_username);
+    strcpy(Data.MQTT_Password, mqtt_password);
+    strcpy(Data.WLAN_SSID, wlan_ssid);
+    strcpy(Data.WLAN_Password, wlan_password);
 
     EEPROM.begin(512);
 }

src/FabReader_v2/src/NFC.cpp

@@ -3,7 +3,7 @@
 #include <PubSubClient.h>
 #include <MFRC522.h>
 
-NFC::NFC(int pin_ss, int pin_rst, PubSubClient* mqtt)
+NFC::NFC(int pin_ss, int pin_rst)
 {
     SPI.begin();
 
@@ -16,22 +16,24 @@ bool NFC::hasNewCard()
     return rfid->PICC_IsNewCardPresent() && rfid->PICC_ReadCardSerial() && rfid->uid.sak == 0x20;
 }
 
-bool NFC::hasActiveOTA()
+void NFC::selectCard()
 {
-    return activOTA;
+    rfid->PICC_Select(&(rfid->uid));
+    uid = rfid->uid;
+    cardSelected = true;
+}
+void NFC::deselectCard()
+{
+    rfid->PICC_HaltA();
+    cardSelected = false;
 }
 
-void NFC::startOTA()
+bool NFC::isCardLost()
 {
-    // TODO
+    return rfid->PICC_ReadCardSerial() && rfid->uid.uidByte != uid.uidByte;
 }
 
-void NFC::continueOTA()
+MFRC522::StatusCode NFC::Transceive(byte* command, byte command_len, byte* response, byte response_len)
 {
-    // TODO
+    return rfid->PCD_TransceiveData(command, command_len, response, &response_len, NULL, 0, true);
-}
-
-void NFC::cancelOTA()
-{
-    
 }

src/FabReader_v2/src/NFC.h

@@ -8,17 +8,17 @@ class NFC
 {
     private:
         MFRC522* rfid;
-        PubSubClient* mqtt;
+        MFRC522::Uid uid;
-        bool activOTA = false;
+        bool cardSelected;
 
     public:
-        NFC(int pin_ss, int pin_rst, PubSubClient* mqtt);
+        NFC(int pin_ss, int pin_rst);
         bool hasNewCard();
-        bool hasActiveOTA();
+        void selectCard();
+        void deselectCard();
+        bool isCardLost();  
 
-        void startOTA();
+        MFRC522::StatusCode Transceive(byte* command, byte command_len, byte* response, byte response_len);
-        void continueOTA();
-        void cancelOTA();
 };
 
 #endif

src/FabReader_v2/src/OTAProxy.cpp

@@ -0,0 +1,61 @@
+#include "OTAProxy.h"
+#include "NFC.h"
+#include <PubSubClient.h>
+
+OTAProxy::OTAProxy(PubSubClient* mqttClient, NFC* nfc, int id)
+{
+    this->mqtt = mqttClient;
+    this->nfc = nfc;
+    this->id = id;
+}
+
+bool OTAProxy::hasActiveOTA()
+{
+    return activeOTA;
+}
+
+void OTAProxy::startOTA()
+{
+    nfc->selectCard();
+    activeOTA = true;
+
+    char topic[] = "fabreader/00000/startOTA";
+    sprintf(topic, "fabreader/%05d/startOTA", id);
+    mqtt->publish(topic, "");
+}
+
+void OTAProxy::continueOTA(char* topic, byte* payload, unsigned int length)
+{
+    char topic_requestOTA[] = "fabreader/00000/requestOTA";
+    sprintf(topic_requestOTA, "fabreader/%05d/requestOTA", id);
+
+    char topic_responseOTA[] = "fabreader/00000/responseOTA";
+    sprintf(topic_responseOTA, "fabreader/%05d/responseOTA", id);
+
+    char topic_stopOTA[] = "fabreader/00000/stopOTA";
+    sprintf(topic_stopOTA, "fabreader/%05d/stopOTA", id);
+
+    if(strcmp(topic, topic_requestOTA))
+    {
+        byte response[APDU_BUFFER_SIZE] = {0};
+        nfc->Transceive(payload, length, response, APDU_BUFFER_SIZE);
+
+        mqtt->publish(topic_responseOTA, response, APDU_BUFFER_SIZE);
+    }
+
+    if(strcmp(topic, topic_stopOTA))
+    {
+        nfc->deselectCard();
+        activeOTA = false;
+    }
+}
+
+void OTAProxy::cancelOTA()
+{
+    char topic_cancelOTA[] = "fabreader/00000/cancelOTA";
+    sprintf(topic_cancelOTA, "fabreader/%05d/cancelOTA", id);
+    mqtt->publish(topic_cancelOTA, "");
+
+    nfc->deselectCard();
+    activeOTA = false;
+}

src/FabReader_v2/src/OTAProxy.h

@@ -0,0 +1,26 @@
+#ifndef OTAProxy_H
+#define OTAProxy_H
+
+#include <PubSubClient.h>
+#include "NFC.h"
+#define MSG_BUFFER_SIZE	50
+#define APDU_BUFFER_SIZE 256
+
+class OTAProxy
+{
+    private:
+        bool activeOTA;
+        PubSubClient* mqtt;
+        NFC* nfc;
+        int id;
+        char msg[MSG_BUFFER_SIZE];
+    public:
+        OTAProxy(PubSubClient* mqtt, NFC* nfc, int id);
+        bool hasActiveOTA();
+
+        void startOTA();
+        void continueOTA(char* topic, byte* payload, unsigned int length);
+        void cancelOTA();
+};
+
+#endif

src/FabReader_v2/src/main.cpp

@@ -4,6 +4,7 @@
 #include "Config.h"
 #include "Pins.h"
 #include "NFC.h"
+#include "OTAProxy.h"
 
 #include <ESP8266WiFi.h>
 #include <ESP8266WebServer.h>
@@ -14,13 +15,71 @@
 #include <MFRC522.h>
 #include <SSD1306Wire.h>
 
-Config config;
+WiFiClient espClient;
-WiFiClient wifiClient;
+Config_Data config;
-PubSubClient mqttClient;
+
+PubSubClient* mqtt;
 NFC* nfc;
+OTAProxy* ota;
+
+void setup_wifi() 
+{
+    delay(10);
+    Serial.println("Connecting Wifi");
+
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(config.WLAN_SSID, config.WLAN_Password);
+
+    while (WiFi.status() != WL_CONNECTED)
+    {
+        delay(500);
+    }
+
+    randomSeed(micros());
+    Serial.println("WiFi connected");
+}
+
+void reconnect() 
+{
+    while (!mqtt->connected())
+    {
+        String clientId = "FabReader_";
+        clientId += String(config.ID);
+        if (mqtt->connect(clientId.c_str()))
+        {
+            Serial.println("connected");
+            char id[6] = "00000";
+            sprintf(id, "%05d", config.ID);
+            mqtt->publish("fabreader", id);
+
+            char topic[] = "fabreader/00000/#";
+            sprintf(topic, "fabreader/%05d/#", config.ID);
+
+            mqtt->subscribe(topic);
+        } else {
+            Serial.print("failed, rc=");
+            Serial.print(mqtt->state());
+            Serial.println(" try again in 5 seconds");
+            delay(5000);
+        }
+    }
+}
+
+void callback(char* topic, byte* payload, unsigned int length) 
+{
+    if(ota->hasActiveOTA())
+    {
+        ota->continueOTA(topic, payload, length);
+    }
+}
 
 void setup()
 {
+    config.ID = 1;
+    strcpy(config.WLAN_SSID, "");
+    strcpy(config.WLAN_Password, "");
+    strcpy(config.MQTT_Broker, "");
+
     Serial.begin(115200);
     Serial.print("\n\n\n");
     Serial.println("Booting ...");
@@ -31,13 +90,31 @@ void setup()
     digitalWrite(PIN_ETH_SPI_SS, HIGH);
 
     Serial.println("NFC ...");
-    nfc = new NFC(PIN_RFID_SPI_SS, PIN_RFID_RST, &mqttClient);
+    nfc = new NFC(PIN_RFID_SPI_SS, PIN_RFID_RST);
+
+    setup_wifi();
+
+    mqtt = new PubSubClient(espClient);
+    mqtt->setServer(config.MQTT_Broker, config.MQTT_Port);
+    mqtt->setCallback(callback);
+
+    ota = new OTAProxy(mqtt, nfc, config.ID);
 }
 
 void loop()
 {
-    if (nfc->hasNewCard())
+    if (!mqtt->connected()) 
     {
-        Serial.println("New Card");
+        reconnect();
+    }
+    mqtt->loop();
+
+    if(!ota->hasActiveOTA() && nfc->hasNewCard())
+    {
+        ota->startOTA();
+    }
+    if(ota->hasActiveOTA() && nfc->isCardLost())
+    {
+        ota->cancelOTA();
     }
 }