Diff: src/peer_to_peer_example.cpp

Revision:

0:aa8df9825311

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/peer_to_peer_example.cpp	Mon Sep 25 09:41:00 2017 +0000
@@ -0,0 +1,200 @@
+#include "dot_util.h"
+#include "RadioEvent.h"
+ 
+#if ACTIVE_EXAMPLE == PEER_TO_PEER_EXAMPLE
+
+/////////////////////////////////////////////////////////////////////////////
+// -------------------- DOT LIBRARY REQUIRED ------------------------------//
+// * Because these example programs can be used for both mDot and xDot     //
+//     devices, the LoRa stack is not included. The libmDot library should //
+//     be imported if building for mDot devices. The libxDot library       //
+//     should be imported if building for xDot devices.                    //
+// * https://developer.mbed.org/teams/MultiTech/code/libmDot-dev-mbed5/    //
+// * https://developer.mbed.org/teams/MultiTech/code/libmDot-mbed5/        //
+// * https://developer.mbed.org/teams/MultiTech/code/libxDot-dev-mbed5/    //
+// * https://developer.mbed.org/teams/MultiTech/code/libxDot-mbed5/        //
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////
+// * these options must match between the two devices in   //
+//   order for communication to be successful
+/////////////////////////////////////////////////////////////
+static uint8_t network_address[] = { 0x01, 0x02, 0x03, 0x04 };
+static uint8_t network_session_key[] = { 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04 };
+static uint8_t data_session_key[] = { 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04 };
+
+mDot* dot = NULL;
+lora::ChannelPlan* plan = NULL;
+
+Serial pc(USBTX, USBRX);
+
+#if defined(TARGET_XDOT_L151CC)
+I2C i2c(I2C_SDA, I2C_SCL);
+ISL29011 lux(i2c);
+#else
+AnalogIn lux(XBEE_AD0);
+#endif
+
+int main() {
+    // Custom event handler for automatically displaying RX data
+    RadioEvent events;
+    uint32_t tx_frequency;
+    uint8_t tx_datarate;
+    uint8_t tx_power;
+    uint8_t frequency_band;
+
+    pc.baud(115200);
+
+    mts::MTSLog::setLogLevel(mts::MTSLog::TRACE_LEVEL);
+    
+#if CHANNEL_PLAN == CP_US915
+    plan = new lora::ChannelPlan_US915();
+#elif CHANNEL_PLAN == CP_AU915
+    plan = new lora::ChannelPlan_AU915();
+#elif CHANNEL_PLAN == CP_EU868
+    plan = new lora::ChannelPlan_EU868();
+#elif CHANNEL_PLAN == CP_KR920
+    plan = new lora::ChannelPlan_KR920();
+#elif CHANNEL_PLAN == CP_AS923
+    plan = new lora::ChannelPlan_AS923();
+#elif CHANNEL_PLAN == CP_AS923_JAPAN
+    plan = new lora::ChannelPlan_AS923_Japan();
+#elif CHANNEL_PLAN == CP_IN865
+    plan = new lora::ChannelPlan_IN865();
+#endif
+    assert(plan);
+
+    dot = mDot::getInstance(plan);
+    assert(dot);
+
+    logInfo("mbed-os library version: %d", MBED_LIBRARY_VERSION);
+
+    // start from a well-known state
+    logInfo("defaulting Dot configuration");
+    dot->resetConfig();
+
+    // make sure library logging is turned on
+    dot->setLogLevel(mts::MTSLog::INFO_LEVEL);
+
+    // attach the custom events handler
+    dot->setEvents(&events);
+
+    // update configuration if necessary
+    if (dot->getJoinMode() != mDot::PEER_TO_PEER) {
+        logInfo("changing network join mode to PEER_TO_PEER");
+        if (dot->setJoinMode(mDot::PEER_TO_PEER) != mDot::MDOT_OK) {
+            logError("failed to set network join mode to PEER_TO_PEER");
+        }
+    }
+    frequency_band = dot->getFrequencyBand();
+    switch (frequency_band) {
+        case lora::ChannelPlan::EU868_OLD:
+        case lora::ChannelPlan::EU868:
+            // 250kHz channels achieve higher throughput
+            // DR_6 : SF7 @ 250kHz
+            // DR_0 - DR_5 (125kHz channels) available but much slower
+            tx_frequency = 869850000;
+            tx_datarate = lora::DR_6;
+            // the 869850000 frequency is 100% duty cycle if the total power is under 7 dBm - tx power 4 + antenna gain 3 = 7
+            tx_power = 4;
+            break;
+
+        case lora::ChannelPlan::US915_OLD:
+        case lora::ChannelPlan::US915:
+        case lora::ChannelPlan::AU915_OLD:
+        case lora::ChannelPlan::AU915:
+            // 500kHz channels achieve highest throughput
+            // DR_8 : SF12 @ 500kHz
+            // DR_9 : SF11 @ 500kHz
+            // DR_10 : SF10 @ 500kHz
+            // DR_11 : SF9 @ 500kHz
+            // DR_12 : SF8 @ 500kHz
+            // DR_13 : SF7 @ 500kHz
+            // DR_0 - DR_3 (125kHz channels) available but much slower
+            tx_frequency = 915500000;
+            tx_datarate = lora::DR_13;
+            // 915 bands have no duty cycle restrictions, set tx power to max
+            tx_power = 20;
+            break;
+
+        case lora::ChannelPlan::AS923:
+        case lora::ChannelPlan::AS923_JAPAN:
+            // 250kHz channels achieve higher throughput
+            // DR_6 : SF7 @ 250kHz
+            // DR_0 - DR_5 (125kHz channels) available but much slower
+            tx_frequency = 924800000;
+            tx_datarate = lora::DR_6;
+            tx_power = 16;
+            break;
+
+        case lora::ChannelPlan::KR920:
+            // DR_5 : SF7 @ 125kHz
+            tx_frequency = 922700000;
+            tx_datarate = lora::DR_5;
+            tx_power = 14;
+            break;
+
+        default:
+            while (true) {
+                logFatal("no known channel plan in use - extra configuration is needed!");
+                wait(5);
+            }
+            break;
+    }
+    // in PEER_TO_PEER mode there is no join request/response transaction
+    // as long as both Dots are configured correctly, they should be able to communicate
+    update_peer_to_peer_config(network_address, network_session_key, data_session_key, tx_frequency, tx_datarate, tx_power);
+
+    // save changes to configuration
+    logInfo("saving configuration");
+    if (!dot->saveConfig()) {
+        logError("failed to save configuration");
+    }
+
+    // display configuration
+    display_config();
+
+#if defined(TARGET_XDOT_L151CC)
+    // configure the ISL29011 sensor on the xDot-DK for continuous ambient light sampling, 16 bit conversion, and maximum range
+    lux.setMode(ISL29011::ALS_CONT);
+    lux.setResolution(ISL29011::ADC_16BIT);
+    lux.setRange(ISL29011::RNG_64000);
+#endif
+
+    while (true) {
+        uint16_t light;
+        std::vector<uint8_t> tx_data;
+
+        // join network if not joined
+        if (!dot->getNetworkJoinStatus()) {
+            join_network();
+        }
+
+#if defined(TARGET_XDOT_L151CC)
+        // get the latest light sample and send it to the gateway
+        light = lux.getData();
+        tx_data.push_back((light >> 8) & 0xFF);
+        tx_data.push_back(light & 0xFF);
+        logInfo("light: %lu [0x%04X]", light, light);
+        send_data(tx_data);
+#else 
+        // get some dummy data and send it to the gateway
+        light = lux.read_u16();
+        tx_data.push_back((light >> 8) & 0xFF);
+        tx_data.push_back(light & 0xFF);
+        logInfo("light: %lu [0x%04X]", light, light);
+        send_data(tx_data);
+#endif
+
+        // the Dot can't sleep in PEER_TO_PEER mode
+        // it must be waiting for data from the other Dot
+        // send data every 5 seconds
+        logInfo("waiting for 5s");
+        wait(5);
+    }
+ 
+    return 0;
+}
+
+#endif
+