Add SORACOM UDP transmission + Orbit example

Author: ciniml

examples/uptime_udp/uptime_udp.ino

@@ -0,0 +1,75 @@
+#include <WiFi.h>
+#include <WireGuard-ESP32.h>
+#include <WiFiUdp.h>
+
+// WiFi configuration --- UPDATE this configuration for your WiFi AP
+char ssid[] = "ssid";
+char password[] = "password";
+
+// WireGuard configuration --- UPDATE this configuration from JSON
+char private_key[] = "(Private Key) ";  // [Interface] PrivateKey
+IPAddress local_ip(1,2,3,4);            // [Interface] Address
+char public_key[] = "(Public Key)";     // [Peer] PublicKey
+char endpoint_address[] = "link.arc.soracom.io";    // [Peer] Endpoint
+int endpoint_port = 11010;              // [Peer] Endpoint
+
+static constexpr const uint32_t UPDATE_INTERVAL_MS = 5000;
+
+static WireGuard wg;
+
+void setup()
+{
+    Serial.begin(115200);
+    Serial.println("Connecting to the AP...");
+    WiFi.begin(ssid, password);
+    while( !WiFi.isConnected() ) {
+        delay(1000);
+    }
+    Serial.println("Adjusting system time...");
+    configTime(9 * 60 * 60, 0, "ntp.jst.mfeed.ad.jp", "ntp.nict.jp", "time.google.com");
+
+    Serial.println("Connected. Initializing WireGuard...");
+    wg.begin(
+        local_ip,
+        private_key,
+        endpoint_address,
+        public_key,
+        endpoint_port);
+}
+
+void loop()
+{
+    static uint64_t send_count = 0;
+    WiFiUDP client;
+    if( !client.beginPacket("uni.soracom.io", 23080) ) {
+        Serial.println("Failed to begin packet...");
+        delay(5000);
+        return;
+    }
+
+    uint64_t uptime_msec = millis();
+    uint8_t buffer[16];
+    buffer[ 0] = (uptime_msec >>  0) & 0xff;
+    buffer[ 1] = (uptime_msec >>  8) & 0xff;
+    buffer[ 2] = (uptime_msec >> 16) & 0xff;
+    buffer[ 3] = (uptime_msec >> 24) & 0xff;
+    buffer[ 4] = (uptime_msec >> 32) & 0xff;
+    buffer[ 5] = (uptime_msec >> 40) & 0xff;
+    buffer[ 6] = (uptime_msec >> 48) & 0xff;
+    buffer[ 7] = (uptime_msec >> 56) & 0xff;
+    buffer[ 8] = (send_count  >>  0) & 0xff;
+    buffer[ 9] = (send_count  >>  8) & 0xff;
+    buffer[10] = (send_count  >> 16) & 0xff;
+    buffer[11] = (send_count  >> 24) & 0xff;
+    buffer[12] = (send_count  >> 32) & 0xff;
+    buffer[13] = (send_count  >> 40) & 0xff;
+    buffer[14] = (send_count  >> 48) & 0xff;
+    buffer[15] = (send_count  >> 56) & 0xff;
+
+    Serial.printf("Sending uptime %lu [ms], count=%d\r\n", uptime_msec, send_count);
+    client.write(buffer, sizeof(buffer));
+    client.endPacket();
+
+    send_count++;
+    delay(UPDATE_INTERVAL_MS);
+}