Semtech / lmic_MOTE_L152RC

LMIC for MOTE_L152RC

Dependents:   lmic_transmit

LoRa WAN in C for NA-mote 72

Currently version 1.5

LoRaWAN network configuration for end-device

The following three pieces of information uniquely identifies end-device to network to allow over-the-air activation. These are stored in the end-device prior to join procedure.

AppEUI

Uniquely identifies application provider of end-device.

Least-significant byte first, 8 bytes. Use LMIC_reverse_memcpy() for AppEUI to keep same byte order as that on lora server.

static const u1_t APPEUI[8]  = { 0x01, 0x00, 0x01, 0x00, 0x00, 0x0C, 0x25, 0x00 };

This is copied into LMIC by os_getArtEui() callback function in application.

DevEUI

End-device ID, unique to each end-node.

Least-significant byte first, 8 bytes. Use LMIC_reverse_memcpy() for DevEUI to keep same byte order as that on lora server.

static const u1_t DEVEUI[8]  = { 0x00, 0x00, 0x00, 0x00, 0x01, 0x0C, 0x25, 0x00 }; 

This is copied into LMIC by os_getDevEui() callback function in application.

AppKey (aka DevKey)

128-bit (16byte) AES key.

static const u1_t DEVKEY[16] = { 0xe4, 0x72, 0x71, 0xc5, 0xf5, 0x30, 0xa9, 0x9f, 0xcf, 0xc4, 0x0e, 0xab, 0xea, 0xd7, 0x19, 0x42 };

This is copied into LMIC by os_getDevKey() callback function in application.

Using over-the air activation, the end-device (LMIC) performs a join procedure every time it starts for first time, or has lost session context information. When join procedure has successfully completed, the end-device will have a network session key (NwkSKey) and an application session key (AppSKey), which are used for encryption and message integrity check.

configuration with http://us01-iot.semtech.com/

• log in to server
• click on Applications
• find your application and click it
• go to configure motes
• to create a mote, you may enter a new DevEUI
  • you may copy-paste the 16byte application key from an already existing mote, if you desire.

transmit power limits

FCC Part 15 rules permit one watt of transmit power when more than 50 channels are used. When received by a 64-channel gateway, the maximum power may be used.

However, if end-device is sending to a 8-channel gateway (single SX1301), the maximum transmit power permitted is +20dBm.

To configure LMIC for use with 8-channel gateway, CHNL_HYBRID should be defined in in config.h, and should be undefined for use with 64-channel gateway.

--- a/TARGET_MOTE_L152RC/hal.cpp	Fri Jul 17 21:09:16 2015 +0000
+++ b/TARGET_MOTE_L152RC/hal.cpp	Sat Jul 18 00:18:44 2015 +0000
@@ -21,7 +21,7 @@
 DigitalOut rfsw1(RFSW1);
 DigitalOut rfsw2(RFSW2);
 
-DigitalOut hdr_fem_ctx(PC_1);
+DigitalOut hdr_fem_csd(PC_0);
 
 static InterruptIn dio0(PC_6);
 static InterruptIn dio1(PC_10);
@@ -123,7 +123,7 @@
     NVIC_SetVector(RTC_WKUP_IRQn, (uint32_t)rtc_wkup_irq);
     NVIC_EnableIRQ(RTC_WKUP_IRQn);
 
-    hdr_fem_ctx = 0;
+    hdr_fem_csd = 0;
 
     hal_enableIRQs();
     
@@ -243,7 +243,7 @@
 #ifdef SLEEP_DEBUG
         start_tick = hal_ticks();
 #endif /* SLEEP_DEBUG */
-        //hdr_fem_ctx = 1;
+
 
         if (deep_sleep) {
 #ifndef USE_DEBUGGER
@@ -260,7 +260,6 @@
         } else
             sleep();    // blocks until waking
 
-        //hdr_fem_ctx = 0;
 #ifdef SLEEP_DEBUG
         end_tick = hal_ticks();
         time_asleep = end_tick - start_tick;
@@ -305,15 +304,15 @@
             rfsw2 = 1;
             rfsw1 = 0;          
         }
-        //hdr_fem_ctx = 0;    // debug   
+        hdr_fem_csd = 0;    // debug   
     } else if (mode == OPMODE_RX || mode == OPMODE_RX_SINGLE || mode == OPMODE_CAD) { // start of reception
         rfsw2 = 1;
         rfsw1 = 1; 
-       //hdr_fem_ctx = 1;    // debug        
+       hdr_fem_csd = 1;    // debug        
     } else { // RF switch shutdown
         rfsw2 = 0;
         rfsw1 = 0;
-        //hdr_fem_ctx = 0;    // debug   
+        hdr_fem_csd = 0;    // debug   
     }
 }