add repeater

examples/RemoteAlarm/Repeater/Repeater.ino

@@ -0,0 +1,100 @@
+// Receive sketch used to report quality of reception.
+// 2012-03-22 <cbrake@bec-systems.com> http://opensource.org/licenses/mit-license.php
+
+// based on https://github.com/jcw/jeelib/tree/master/examples/RF12/rfRangeRX
+// 2011-05-14 <jc@wippler.nl> http://opensource.org/licenses/mit-license.php
+
+// Based on a sample implementation by Steve Evans (@tankslappa).
+
+#include <JeeLib.h>
+
+#define BUFFER_SIZE 64
+#define DISPLAY_INTERVAL 500 // ms
+#define LED_PIN     9   // activity LED, comment out to disable
+
+//PortI2C myI2C (3);
+MilliTimer statTimer;
+
+byte timeBuf [BUFFER_SIZE]; // index is time slot, value is last packet
+byte seqBuf [BUFFER_SIZE];  // index is last packet, value is time slot
+char history [11];
+byte lastSeq;
+
+static void activityLed (byte on) {
+#ifdef LED_PIN
+    pinMode(LED_PIN, OUTPUT);
+    digitalWrite(LED_PIN, !on);
+#endif
+}
+
+
+static void gotPacket () {
+  byte tenths = millis() / 100;
+  // remember for each time slot what the last received packet was
+  timeBuf[tenths % BUFFER_SIZE] = lastSeq;
+  // remember for the last BUFFER_SIZE packets when they arrived
+  seqBuf[lastSeq % BUFFER_SIZE] = tenths;
+}
+
+static byte recvCount (byte period) {
+  // tenths and diff are bytes, so they are automatically modulo 256
+  byte tenths = millis() / 100;
+  byte n = 0;
+  for (byte i = 0; i < sizeof seqBuf; ++i) {
+    byte diff = tenths - seqBuf[i];
+    if (diff <= period)
+      ++n;
+  }
+  return n;
+}
+
+static void updateHistory () {
+  for (byte i = 1; i < 10; ++i)
+    history[10-i] = history[9-i];
+  history[0] = '0';
+  // tenths and diff are bytes, so they are automatically modulo 256
+  byte tenths = millis() / 100;
+  for (byte i = 0; i < DISPLAY_INTERVAL / 100; ++i) {
+    byte pos = (tenths - i - 1) % BUFFER_SIZE;
+    byte diff = lastSeq - timeBuf[pos];
+    if (diff < 5)
+      ++history[0];
+  }
+}
+
+void setup () {
+  Serial.begin(57600);
+  Serial.print("\n[BEC Alarm Repeater]");
+  rf12_initialize('R', RF12_915MHZ);
+}
+
+void send_payload(byte data)
+{
+  while (!rf12_canSend())
+    rf12_recvDone();
+  rf12_sendStart(0, &data, sizeof data);
+}
+
+void loop () {
+  if (rf12_recvDone() && rf12_crc == 0 && rf12_len == 1) {
+    lastSeq = rf12_data[0];
+    gotPacket();
+    activityLed(1);
+    delay(5);
+    activityLed(0);
+    Serial.print("R ");
+    Serial.print(lastSeq);
+    Serial.print("\n");
+    send_payload(rf12_data[0]);
+  }
+
+  if (statTimer.poll(DISPLAY_INTERVAL)) {
+    // number of packets received in the last 5 seconds, as percentage
+    //lcd3dig(0, 0, recvCount(50) * 2);
+    // number of packets received in the last second, as percentage
+    //lcd3dig(9, 0, recvCount(10) * 10);
+    // show number of packets received in the last 10 display intervals
+    updateHistory();
+    //lcd.print(history);
+  }
+}