Initial support for ESP32 Ethernet connection over TLS

Author: alvarolb

CHANGELOG.md

@@ -1,3 +1,7 @@
+2.28.0
+
+- Initial support for ESP32 Ethernet connection over TLS
+
 2.27.0
 
 - Fix compiling issues for AVR

examples/ESP32/ESP32Eth/ESP32Eth.ino

@@ -10,35 +10,44 @@
 //#define ETH_CLK_MODE ETH_CLOCK_GPIO0_IN
 
 // enable debug output over serial
-#define THINGER_SERIAL_DEBUG 
+#define THINGER_SERIAL_DEBUG
+
+// define private server instance
+//#define THINGER_SERVER "acme.aws.thinger.io"
+
+// TLS connection requires SSLClientESP32 library from
+// https://github.com/alkonosst/SSLClientESP32
+
+// disable TLS connection by default
+#define _DISABLE_TLS_
 
 #include <ThingerESP32Eth.h>
 #include "arduino_secrets.h"
 
 ThingerESP32Eth thing(USERNAME, DEVICE_ID, DEVICE_CREDENTIAL);
 
 void setup() {
- 
-  // enable serial for debugging
-  Serial.begin(115200); 
-
-  // example of fixed ip address (dhcp is used by default)
-  //thing.set_address("192.168.1.55", "192.168.1.1", "255.255.255.0", "8.8.8.8", "8.8.4.4");
-  
-  // set desired hostname
-  thing.set_hostname("ESP32Eth");
-
-  // resource output example (i.e. reading a sensor value)
-  thing["eth"] >> [](pson& out){
-    out["hostname"] = ETH.getHostname();
-    out["mac"] = ETH.macAddress();
-    out["ip"] = ETH.localIP().toString();
-    out["link"] = ETH.linkSpeed();
-  };
-
-  // more details at http://docs.thinger.io/arduino/
+
+    // enable serial for debugging
+    Serial.begin(115200);
+
+    // example of fixed ip address (dhcp is used by default)
+    //thing.set_address("192.168.1.55", "192.168.1.1", "255.255.255.0", "8.8.8.8", "8.8.4.4");
+
+    // set desired hostname
+    thing.set_hostname("ESP32Eth");
+
+    // resource output example (i.e. reading a sensor value)
+    thing["eth"] >> [](pson& out){
+        out["hostname"] = ETH.getHostname();
+        out["mac"] = ETH.macAddress();
+        out["ip"] = ETH.localIP().toString();
+        out["link"] = ETH.linkSpeed();
+    };
+
+    // more details at http://docs.thinger.io/arduino/
 }
 
 void loop() {
-  thing.handle();
+    thing.handle();
 }

library.properties

@@ -1,5 +1,5 @@
 name=thinger.io
-version=2.27.0
+version=2.28.0
 author=Alvaro Luis Bustamante <alvarolb@thinger.io>
 maintainer=Thinger.io <admin@thinger.io>
 sentence=Arduino library for IOTMP protocol used on Thinger.io IOT Platform.

src/ThingerESP32Eth.h

@@ -1,9 +1,6 @@
 #ifndef THINGER_ESP32ETH_H
 #define THINGER_ESP32ETH_H
 
-// TODO ESP32 TROUGHT ETHERNET DOES NOT SUPPORT SSL/TLS CONNECTIONS
-#define _DISABLE_TLS_
-
 #ifdef THINGER_FREE_RTOS
 #include "ThingerESP32FreeRTOS.h"
 #endif
@@ -12,6 +9,10 @@
 #include <ThingerClient.h>
 #include <functional>
 
+#ifndef _DISABLE_TLS_
+#include <SSLClientESP32.h>
+#endif 
+
 class ThingerESP32Eth : public ThingerClient
 
 #ifdef THINGER_FREE_RTOS
@@ -24,9 +25,16 @@ class ThingerESP32Eth : public ThingerClient
             ThingerClient(client_, user, device, device_credential)
             #ifdef THINGER_FREE_RTOS
             ,ThingerESP32FreeRTOS(static_cast<ThingerClient&>(*this))
+            #endif,
+            #ifndef _DISABLE_TLS_
+            ,client_(&base_client_)
             #endif
     {
 
+        #ifndef _DISABLE_TLS_
+            client_.setCACert(CA_ROOT_CERTIFICATE);
+        #endif   
+
          WiFi.onEvent([](WiFiEvent_t event){
             switch (event) {
                 case SYSTEM_EVENT_ETH_START:
@@ -100,7 +108,12 @@ class ThingerESP32Eth : public ThingerClient
         return network_connected();
     }
 
+#ifndef _DISABLE_TLS_
+    WiFiClient base_client_;
+    SSLClientESP32 client_;
+#else
     WiFiClient client_;
+#endif
     bool initialized_       = false;
     const char* hostname_   = "esp32-thinger";
     const char* ip_         = nullptr;