add beginnings of mesh radio

src/MeshRadio.cpp

@@ -0,0 +1,63 @@
+#include <SPI.h>
+#include <RH_RF95.h>
+
+#include "MeshRadio.h"
+#include "configuration.h"
+
+// Singleton instance of the radio driver
+RH_RF95 rf95(NSS_GPIO, DIO0_GPIO);
+
+// Change to 434.0 or other frequency, must match RX's freq!
+#define RF95_FREQ 915.0
+
+
+void mesh_init() {
+  pinMode(RESET_GPIO, OUTPUT);
+  digitalWrite(RESET_GPIO, HIGH);
+
+
+  // manual reset
+  digitalWrite(RESET_GPIO, LOW);
+  delay(10);
+  digitalWrite(RESET_GPIO, HIGH);
+  delay(10);
+
+  while (!rf95.init()) {
+    Serial.println("LoRa radio init failed");
+    Serial.println("Uncomment '#define SERIAL_DEBUG' in RH_RF95.cpp for detailed debug info");
+    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);
+  
+  // Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on
+
+  // 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(23, false);
+}
+
+
+int16_t packetnum = 0;  // packet counter, we increment per xmission
+
+void mesh_loop()
+{
+  delay(1000); // Wait 1 second between transmits, could also 'sleep' here!
+  Serial.println("Transmitting..."); // Send a message to rf95_server
+  
+  char radiopacket[20] = "Hello World #      ";
+  itoa(packetnum++, radiopacket+13, 10);
+  Serial.print("Sending "); Serial.println(radiopacket);
+  radiopacket[19] = 0;
+  
+  Serial.println("Sending...");
+  delay(10);
+  rf95.send((uint8_t *)radiopacket, 20);
+}