Add patch for TLS certificate validation

Author: M65649

examples/https_configure_ca/https_configure_ca.ino

@@ -1,7 +1,7 @@
 #include <log.h>
 #include <sequans_controller.h>
 
-#define AT_HTTPS_CONFIGURE_SECURITY_PROFILE "AT+SQNSPCFG=3,2,\"\",1,1"
+#define AT_HTTPS_CONFIGURE_SECURITY_PROFILE "AT+SQNSPCFG=3,2,\"\",0,1"
 
 void setup() {
     Log.begin(115200);

examples/sandbox/sandbox.ino

@@ -12,6 +12,7 @@
 #include <lte.h>
 #include <mcp9808.h>
 #include <mqtt_client.h>
+#include <sequans_controller.h>
 #include <veml3328.h>
 
 #define HEARTBEAT_INTERVAL_MS 10000
@@ -305,6 +306,16 @@ void setup() {
     sprintf(mqtt_sub_topic, MQTT_SUB_TOPIC_FMT, thing_name);
     sprintf(mqtt_pub_topic, MQTT_PUB_TOPIC_FMT, thing_name);
 
+    // - Patch begin -
+    // Patch for TLS verification in certain regions
+    SequansController.begin();
+
+    // Allow time for boot
+    delay(500);
+    while (!SequansController.retryCommand(
+        "AT+SQNSPCFG=1,2,\"0xC02B\",0,19,0,0,\"\",\"\",1,0,0")) {}
+    // - Patch end -
+
     Log.info("Connecting to LTE network...");
     connectLTE();
 }

src/lte.cpp

@@ -83,15 +83,15 @@ bool LteClass::begin(void) {
 
     SequansController.clearReceiveBuffer();
 
-    // This might fail the first times after initializing the sequans
-    // controller, so we just retry until they succeed
     SequansController.retryCommand(AT_COMMAND_ENABLE_CEREG_URC);
-
     SequansController.retryCommand(AT_COMMAND_CONNECT);
 
     // CPIN might fail if issued to quickly after CFUN
     delay(500);
 
+    // Clear receive buffer before querying the SIM card
+    SequansController.clearReceiveBuffer();
+
     // We check that the SIM card is inserted and ready. Note that we can only
     // do this and get a meaningful response in CFUN=1 or CFUN=4.
     SequansController.retryCommand(AT_COMMAND_CHECK_SIM);
@@ -114,6 +114,7 @@ bool LteClass::begin(void) {
 
         Log.error("Failed to extract value from command response during SIM "
                   "status check");
+        SequansController.retryCommand(AT_COMMAND_DISCONNECT);
         return false;
     }