wotio library demonstrating LoRaWAN connectivity using MultiTech mDot & MultiTech Conduit Gateway
Dependencies: libmDot mbed-rtos mbed
Diff: main.cpp
- Revision:
- 0:eea6446bc510
- Child:
- 1:6b84fe382e27
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Oct 28 22:04:20 2015 +0000 @@ -0,0 +1,145 @@ +#include "mbed.h" +#include "mDot.h" +#include "MTSLog.h" +#include <string> +#include <vector> +#include <algorithm> + +// these options must match the settings on your Conduit +// uncomment the following lines and edit their values to match your configuration +static std::string config_network_name = "wotioloranetwork"; +static std::string config_network_pass = "iotandbigdata"; +static uint8_t config_frequency_sub_band = 7; + + +#define UDK2 1 + +#ifdef UDK2 +DigitalOut led(LED1); +#else +DigitalOut led(XBEE_RSSI); +#endif + +Ticker tick; + +// callback function to change LED state +void blink() { + led = !led; +} + + + +int main() { + int32_t ret; + mDot* dot; + std::vector<uint8_t> data; + std::string data_str = "hello!"; + + + // configure the Ticker to blink the LED on 500ms interval + tick.attach(&blink, 0.5); + + // print the message on 2s interval + while (true) { + printf("hello world"); + wait(2); + } + + + // get a mDot handle + dot = mDot::getInstance(); + + // print library version information + logInfo("version: %s", dot->getId().c_str()); + + //******************************************* + // configuration + //******************************************* + // reset to default config so we know what state we're in + dot->resetConfig(); + + 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"); + } + //******************************************* + // end of configuration + //******************************************* + + // 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) { + logError("failed to join network %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); + } + } + if (dot->getNetworkJoinStatus()) { + // send the data + // ACKs are enabled by default, so we're expecting to get one back + if ((ret = dot->send(data)) != mDot::MDOT_OK) { + logError("failed to send %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); + } else { + logInfo("successfully sent data to gateway"); + } + } + + // 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 + dot->sleep(sleep_time, mDot::RTC_ALARM); + + // go to deepsleep and wake up on rising edge of WKUP pin (PA0/XBEE_CTS/XBEE_DIO7) + // dot->sleep(0, mDot::INTERRUPT); + + return 0; +}