put tls behind feature flag

deploy.sh

@@ -63,7 +63,7 @@ then
     echo "Make sure the ESP is connected with a data USB cable, and try again."
     exit 1
 fi
-esptool.py erase_flash &&
+# esptool.py erase_flash &&
 git pull &&
 cd factory &&
 cargo espflash flash --release --port $PORT &&

sphinx-key/Cargo.toml

@@ -10,6 +10,7 @@ default    = ["std"]
 no_persist = []
 pingpong   = []
 std        = ["sphinx-signer"]
+tls        = []
 
 [dependencies]
 hex              = "0.4.3"

sphinx-key/src/conn/mqtt.rs

@@ -24,16 +24,21 @@ pub fn make_client(
     tx: mpsc::Sender<CoreEvent>,
 ) -> Result<EspMqttClient<ConnState<MessageImpl, EspError>>> {
     log::info!("make_client with id {}", client_id);
-    let conf = MqttClientConfiguration {
+    let mut conf = MqttClientConfiguration {
         client_id: Some(client_id),
         buffer_size: 4096,
         task_stack: 12288,
         username: Some(username),
         password: Some(password),
-        crt_bundle_attach: Some(esp_idf_sys::esp_crt_bundle_attach),
+        // crt_bundle_attach: Some(esp_idf_sys::esp_crt_bundle_attach),
         ..Default::default()
     };
 
+    #[cfg(feature = "tls")]
+    {
+        conf.crt_bundle_attach = Some(esp_idf_sys::esp_crt_bundle_attach);
+    }
+
     let mut mqtturl = broker.to_string();
     if !(mqtturl.starts_with("mqtt://") || mqtturl.starts_with("mqtts://")) {
         let scheme = if mqtturl.contains("8883") {