Diff: main.cpp

Revision:

4:ac599fe6bc41

Parent:

2:4f4f5307d9e4

Child:

5:9788d9d9875d

--- a/main.cpp	Thu Sep 10 18:24:37 2015 +0000
+++ b/main.cpp	Wed Sep 30 20:06:52 2015 +0000
@@ -1,8 +1,9 @@
 #include "mbed.h"
 #include "mDot.h"
+#include "MTSLog.h"
 #include <string>
 #include <vector>
-#include "MTSLog.h"
+#include <algorithm>
 
 // these options must match the settings on your Conduit
 // uncomment the following lines and edit their values to match your configuration
@@ -14,8 +15,8 @@
     int32_t ret;
     mDot* dot;
     std::vector<uint8_t> data;
-    std::string data_str = "hello world!";
-
+    std::string data_str = "hello!";
+    
     // get a mDot handle
     dot = mDot::getInstance();
     
@@ -28,22 +29,50 @@
     // reset to default config so we know what state we're in
     dot->resetConfig();
     
-    dot->setLogLevel(mts::MTSLog::TRACE_LEVEL);
+    dot->setLogLevel(mts::MTSLog::INFO_LEVEL);
 
     // set up the mDot with our network information: frequency sub band, network name, and network password
     // these can all be saved in NVM so they don't need to be set every time - see mDot::saveConfig()
+    
+    // frequency sub band is only applicable in the 915 (US) frequency band
+    // if using a MultiTech Conduit gateway, use the same sub band as your Conduit (1-8) - the mDot will use the 8 channels in that sub band
+    // if using a gateway that supports all 64 channels, use sub band 0 - the mDot will use all 64 channels
     logInfo("setting frequency sub band");
     if ((ret = dot->setFrequencySubBand(config_frequency_sub_band)) != mDot::MDOT_OK) {
         logError("failed to set frequency sub band %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
     }
+    
     logInfo("setting network name");
     if ((ret = dot->setNetworkName(config_network_name)) != mDot::MDOT_OK) {
         logError("failed to set network name %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
     }
+    
     logInfo("setting network password");
     if ((ret = dot->setNetworkPassphrase(config_network_pass)) != mDot::MDOT_OK) {
         logError("failed to set network password %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
     }
+    
+    // a higher spreading factor allows for longer range but lower throughput
+    // in the 915 (US) frequency band, spreading factors 7 - 10 are available
+    // in the 868 (EU) frequency band, spreading factors 7 - 12 are available
+    logInfo("setting TX spreading factor");
+    if ((ret = dot->setTxDataRate(mDot::SF_10)) != mDot::MDOT_OK) {
+        logError("failed to set TX datarate %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
+    }
+    
+    // request receive confirmation of packets from the gateway
+    logInfo("enabling ACKs");
+    if ((ret = dot->setAck(1)) != mDot::MDOT_OK) {
+        logError("failed to enable ACKs %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
+    }
+    
+    // set join mode to AUTO_OTA so the mDot doesn't have to rejoin after sleeping
+    logInfo("setting join mode to AUTO_OTA");
+    if ((ret = dot->setJoinMode(mDot::AUTO_OTA)) != mDot::MDOT_OK) {
+        logError("failed to set join mode %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
+    }
+    
+    // save this configuration to the mDot's NVM
     logInfo("saving config");
     if (! dot->saveConfig()) {
         logError("failed to save configuration");
@@ -51,17 +80,12 @@
     //*******************************************
     // end of configuration
     //*******************************************
-    
-    // attempt to join the network
-    logInfo("joining network");
-    if ((ret = dot->joinNetwork()) != mDot::MDOT_OK) {
-        logError("failed to join network %d:%s", ret, mDot::getReturnCodeString(ret).c_str());
-    }
 
     // format data for sending to the gateway
     for (std::string::iterator it = data_str.begin(); it != data_str.end(); it++)
         data.push_back((uint8_t) *it);
 
+    // join the network if not joined
     if (!dot->getNetworkJoinStatus()) {
         logInfo("network not joined, joining network");
         if ((ret = dot->joinNetwork()) != mDot::MDOT_OK) {
@@ -78,7 +102,8 @@
         }
     }
 
-    uint32_t sleep_time = (dot->getNextTxMs() / 1000) + 10;
+    // in the 868 (EU) frequency band, we need to wait until another channel is available before transmitting again
+    uint32_t sleep_time = std::max((uint32_t)10000, (uint32_t)dot->getNextTxMs()) / 1000;
     logInfo("going to sleep...");
 
     // go to deepsleep and wake up automatically sleep_time seconds later