add debug demo

Feather9x_debug_demo/Feather9x_debug_demo.ino

@@ -0,0 +1,143 @@
+#include <SPI.h>
+#include <RH_RF95.h>
+#include <string>
+
+/* for feather m0 */
+#define RFM95_CS 8
+#define RFM95_RST 4
+#define RFM95_INT 3
+
+// Change to 434.0 or other frequency, must match RX's freq!
+#define RF95_FREQ 915.0
+
+// Lower bandwidth means longer distance but lower data rate
+// Valid values are:
+// 0-7800khz: 7.8
+// 7801-10400khz: 10.4 
+// 10401-15600 15.6 
+// 15601-20800 20.8
+// 20801-31250 31.25
+// 31251-41700 41.7
+// 41701-62500 62.5
+// 62501-12500 125.0 DEFAULT
+// 12501-250000 250.0
+// >250000 500.0
+#define RF95_BANDWIDTH 62.5
+
+// Higher spread factor means longer distance
+// Valid values are 6-12
+#define RF95_SPREAD_FACTOR 12
+
+// Higher TX power means longer distance
+// Valid values are 5-23
+#define RF95_TX_POWER 23
+
+// Make sure you run setLowDatarate() when going for long distance
+
+// Singleton instance of the radio driver
+RH_RF95 rf95(RFM95_CS, RFM95_INT);
+
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);
+  pinMode(RFM95_RST, OUTPUT);
+  // Start with the LED on low
+  digitalWrite(LED_BUILTIN, LOW);
+
+  while (!Serial);  // wait until serial console is open, remove if not tethered to computer
+  Serial.begin(115200);
+  delay(100);
+  Serial.println("Feather LoRa RX Debug Demo!");
+
+  // manual reset
+  digitalWrite(RFM95_RST, LOW);
+  delay(10);
+  digitalWrite(RFM95_RST, HIGH);
+  delay(10);
+
+  while (!rf95.init()) {
+    Serial.println("LoRa radio init failed");
+    while (1);
+  }
+  Serial.println("LoRa radio init OK!");
+
+  // Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM
+  if (!rf95.setFrequency(RF95_FREQ)) {
+    Serial.println("setFrequency failed");
+    while (1);
+  }
+  Serial.print("Set Freq to: ");
+  Serial.println(RF95_FREQ);
+
+  // Set the signal bandwidth
+  rf95.setSignalBandwidth(RF95_BANDWIDTH);
+  Serial.print("Set bandwidth to: ");
+  Serial.println(RF95_BANDWIDTH);
+
+  // Set the signal bandwidth
+  rf95.setSpreadingFactor(RF95_SPREAD_FACTOR);
+  Serial.print("Set spreading factor to: ");
+  Serial.println(RF95_SPREAD_FACTOR);
+
+  // Set low transmission rate
+  rf95.setLowDatarate();
+  Serial.println("Set low data rate");
+
+  // The default transmitter power is 13dBm, using PA_BOOST.
+  // If you are using RFM95/96/97/98 modules which uses the PA_BOOST transmitter pin, then
+  // you can set transmitter powers from 5 to 23 dBm:
+  rf95.setTxPower(RF95_TX_POWER, false);
+  
+  // Begin the user interaction piece
+  Serial.println("Please enter your name: ");
+}
+
+int32_t packet_num = 0;
+String serial_input = "";
+String chat_name = "";
+String chat_message = "";
+
+void loop() {
+
+  // We start in anonymous mode
+  // When we enter a name we can start messaging in the chat
+  if (chat_name == "") {
+    if (Serial.available()) {
+      // read the incoming byte:
+      chat_name = Serial.readStringUntil('\0');
+      String intro_message = chat_name + " has joined the chat!";
+
+      Serial.println("Welcome " + chat_name);
+      digitalWrite(LED_BUILTIN, HIGH);
+      rf95.send((uint8_t *)reinterpret_cast<const uint8_t *>(&intro_message), RH_RF95_MAX_MESSAGE_LEN);
+      rf95.waitPacketSent();
+      digitalWrite(LED_BUILTIN, LOW);
+    }
+  } else {
+    if (Serial.available()) {
+      // read the incoming byte:
+      digitalWrite(LED_BUILTIN, HIGH);
+      chat_message = Serial.readStringUntil('\0');
+      String send_message = chat_name + ": " + chat_message;
+
+      Serial.println(send_message);
+      rf95.send((uint8_t *)reinterpret_cast<const uint8_t *>(&send_message), RH_RF95_MAX_MESSAGE_LEN);
+      rf95.waitPacketSent();
+      digitalWrite(LED_BUILTIN, LOW);
+    }
+  }
+  // Receiver code
+  if (rf95.available()) {
+    digitalWrite(LED_BUILTIN, HIGH);
+    // Should be a message for us now
+    uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
+    uint8_t len = sizeof(buf);
+
+    if (rf95.recv(buf, &len)) {
+      // RH_RF95::printBuffer("Received: ", buf, len);
+      Serial.println((char *)buf);
+      // Serial.print("RSSI: ");
+      // Serial.println(rf95.lastRssi(), DEC);
+      digitalWrite(LED_BUILTIN, LOW);
+    }
+  }
+}