examples/lorawan: rename to lorawan_otaa + add pm

examples/lorawan/README.md → examples/lorawan_otaa/README.md

@@ -1,5 +1,5 @@
-LoRaWAN
-=======
+LoRaWAN - OTAA
+==============
 
 Description
 -----------
@@ -9,7 +9,7 @@ This application shows a simple use case of LoRaWAN with RIOT.
 By using the real time clock and low-power capabilities of a board, this
 application shows how to program a LoRaWAN Class A device using RIOT.
 
-This application is using the Over-The-Air Activation procedure.
+This application is using the Over-The-Air Activation (OTAA) procedure.
 
 Usage
 -----

examples/lorawan/main.c → examples/lorawan_otaa/main.c

@@ -26,6 +26,9 @@
 #include "msg.h"
 #include "thread.h"
 #include "fmt.h"
+#ifdef MODULE_PM_LAYERED
+#include "pm_layered.h"
+#endif
 
 #include "periph/rtc.h"
 
@@ -35,6 +38,9 @@
 /* Messages are sent every 20s to respect the duty cycle on each channel */
 #define PERIOD              (20U)
 
+/* Low-power mode level */
+#define PM_LOCK_LEVEL       (1)
+
 #define SENDER_PRIO         (THREAD_PRIORITY_MAIN - 1)
 static kernel_pid_t sender_pid;
 static char sender_stack[THREAD_STACKSIZE_MAIN / 2];
@@ -50,6 +56,12 @@ static uint8_t appkey[LORAMAC_APPKEY_LEN];
 static void rtc_cb(void *arg)
 {
     (void) arg;
+
+#ifdef MODULE_PM_LAYERED
+    /* block sleep level mode until the next sending cycle has completed */
+    pm_block(PM_LOCK_LEVEL);
+#endif
+
     msg_t msg;
     msg_send(&msg, sender_pid);
 }
@@ -95,6 +107,11 @@ static void *sender(void *arg)
 
         /* Schedule the next wake-up alarm */
         _prepare_next_alarm();
+
+#ifdef MODULE_PM_LAYERED
+        /* go back to sleep */
+        pm_unblock(PM_LOCK_LEVEL);
+#endif
     }
 
     /* this should never be reached */