sending and receiving message via Rhai script + added examples

examples/mycelium/mycelium_receive_message.rhai

@@ -0,0 +1,31 @@
+// Script to receive Mycelium messages
+
+// API URL for Mycelium
+let api_url = "http://localhost:2222";
+
+// Receive messages
+// This script will listen for messages on a specific topic.
+// Ensure the sender script is using the same topic.
+// -----------------------------------------------------------------------------//
+print("\nReceiving messages:");
+let receive_topic = "test_topic";
+let wait_deadline_secs = 100; 
+
+print(`Listening for messages on topic '${receive_topic}'...`);
+try {
+    let messages = mycelium_receive_messages(api_url, receive_topic, wait_deadline_secs);
+    
+    if messages.is_empty() {
+        // print("No new messages received in this poll.");
+    } else {
+        print("Received a message:");
+        print(`  Message id: ${messages.id}`);
+        print(`  Message from: ${messages.srcIp}`);
+        print(`  Topic: ${messages.topic}`);
+        print(`  Payload: ${messages.payload}`);
+    }
+} catch(err) {
+    print(`Error receiving messages: ${err}`);
+}
+
+print("Finished attempting to receive messages.");

examples/mycelium/mycelium_send_message.rhai

@@ -0,0 +1,25 @@
+// Script to send a Mycelium message
+
+// API URL for Mycelium
+let api_url = "http://localhost:1111";
+
+// Send a message
+// TO SEND A MESSAGE FILL IN THE DESTINATION IP ADDRESS
+// -----------------------------------------------------//
+print("\nSending a message:");
+let destination = "5af:ae6b:dcd8:ffdb:b71:7dde:d3:1033"; // IMPORTANT: Replace with the actual destination IP address
+let topic = "test_topic";
+let message = "Hello from Rhai sender!";
+let deadline_secs = -10; // Seconds we wait for a reply
+
+try {
+    print(`Attempting to send message to ${destination} on topic '${topic}'`);
+    let result = mycelium_send_message(api_url, destination, topic, message, deadline_secs);
+    print(`result: ${result}`);
+    print(`Message sent: ${result.success}`);
+    if result.id != "" {
+        print(`Message ID: ${result.id}`);
+    }
+} catch(err) {
+    print(`Error sending message: ${err}`);
+}