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.

example C code

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.

example C code

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.

example C code

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.

Information

DevEUI is entered in reverse order into C-code from that shown on server (unique device ID).

AppEUI is entered in reverse order into C-code from that shown on server.

AppEUI is equivalent to "Application"

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.

CHNL_HYBRID125KHz500KHz
defined valuechannelschannel
00 to 764
18 to 1565
216 to 2366
324 to 3167
432 to 3968
540 to 4769
648 to 5570
756 to 6371
undef0 to 6364 to 71

Diff: TARGET_MOTE_L152RC/hal.h

Revision:
0:f2716e543d97
diff -r 000000000000 -r f2716e543d97 TARGET_MOTE_L152RC/hal.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_MOTE_L152RC/hal.h	Tue Jun 02 19:04:29 2015 +0000
@@ -0,0 +1,90 @@
+/*******************************************************************************
+ * Copyright (c) 2014-2015 IBM Corporation.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    IBM Zurich Research Lab - initial API, implementation and documentation
+ *******************************************************************************/
+
+#ifndef _hal_hpp_
+#define _hal_hpp_
+
+/*
+ * initialize hardware (IO, SPI, TIMER, IRQ).
+ */
+void hal_init (void);
+
+/*
+ * drive radio NSS pin (0=low, 1=high).
+ */
+void hal_pin_nss (u1_t val);
+
+/*
+ * drive radio RX/TX pins (0=rx, 1=tx).
+ */
+//void hal_pin_rxtx (u1_t val);
+void hal_opmode(u1_t mode, u1_t pa_boost);
+
+/*
+ * control radio RST pin (0=low, 1=high, 2=floating)
+ */
+void hal_pin_rst (u1_t val);
+
+/*
+ * perform 8-bit SPI transaction with radio.
+ *   - write given byte 'outval'
+ *   - read byte and return value
+ */
+u1_t hal_spi (u1_t outval);
+
+/*
+ * disable all CPU interrupts.
+ *   - might be invoked nested 
+ *   - will be followed by matching call to hal_enableIRQs()
+ */
+void hal_disableIRQs (void);
+
+/*
+ * enable CPU interrupts.
+ */
+void hal_enableIRQs (void);
+
+/*
+ * put system and CPU in low-power mode, sleep until interrupt.
+ */
+void hal_sleep (void);
+
+/*
+ * return 32-bit system time in ticks.
+ */
+u4_t hal_ticks (void);
+
+/*
+ * busy-wait until specified timestamp (in ticks) is reached.
+ */
+void hal_waitUntil (u4_t time);
+
+/*
+ * check and rewind timer for target time.
+ *   - return 1 if target time is close
+ *   - otherwise rewind timer for target time or full period and return 0
+ */
+u1_t hal_checkTimer (u4_t targettime);
+
+/*
+ * perform fatal failure action.
+ *   - called by assertions
+ *   - action could be HALT or reboot
+ */
+void hal_failed (void);
+
+#ifndef OSTICKS_PER_SEC
+#define OSTICKS_PER_SEC 16384
+#elif OSTICKS_PER_SEC < 10000 || OSTICKS_PER_SEC > 64516
+#error Illegal OSTICKS_PER_SEC - must be in range [10000:64516]. One tick must be 15.5us .. 100us long.
+#endif
+
+#endif // _hal_hpp_