Demo of DHT11->mDot->TTN
Dependencies: DHT22 DS18B20_1wire SHTx TSL2561_I2C libmDot mbed-rtos mbed
Fork of mDot_TTN_DHT11 by
main.cpp
00001 /** mDot_TTN_Raingarden -- Rain Garden Sensor by The Things Network New York 00002 * 00003 * This firmware runs an mDot dev board, with the following sensors: 00004 * - DHT22 - air temp & humidity 00005 * - TSL2561 - ambient light 00006 * - SHT10 - soil temp & humidity 00007 * - DS18B20 - water temp 00008 * 00009 * Uses MultiTech mDot developer board http://www.multitech.com/models/94558010LF 00010 * Requires a MultiTech MultiConnect Conduit http://www.multitech.com/models/94557203LF 00011 * http://www.multitech.net/developer/software/lora/conduit-mlinux-convert-to-basic-packet-forwarder/ 00012 * http://forum.thethingsnetwork.org/t/setting-up-multitech-conduit-gateway-for-ttn/216/35 00013 * 00014 * To receive and visualize this data: 00015 * 00016 */ 00017 00018 #include "mbed.h" 00019 #include "mDot.h" 00020 #include "MTSLog.h" 00021 #include "MTSText.h" 00022 #include "DHT22.h" 00023 #include "TSL2561_I2C.h" 00024 #include "sht15.hpp" 00025 #include "DS18B20.h" 00026 #include <string> 00027 #include <vector> 00028 00029 using namespace mts; 00030 00031 /* Pin definitions */ 00032 00033 // air temp/humid sensor 00034 #define DHT_PIN PA_1 00035 DHT22 dht(DHT_PIN); 00036 00037 // water temp sensor 00038 #define DS_PIN PA_11 00039 DS18B20 thermom(DS_PIN, DS18B20::RES_12_BIT); 00040 00041 // soil temp/humid sensor 00042 #define SHT_DATA_PIN PA_4 00043 #define SHT_SCK_PIN PC_13 00044 SHTx::SHT15 sht(SHT_DATA_PIN, SHT_SCK_PIN); 00045 00046 // light sensor 00047 #define TSL_DATA_PIN PC_9 00048 #define TSL_SCK_PIN PA_8 00049 TSL2561_I2C tsl(TSL_DATA_PIN, TSL_SCK_PIN); 00050 00051 // LEDs 00052 #define STATUS PB_1 00053 00054 #define MIN(a,b) (((a)<(b))?(a):(b)) 00055 #define MAX(a,b) (((a)>(b))?(a):(b)) 00056 00057 00058 /** ABP 00059 * Register your device and update these values: 00060 * https://account.thethingsnetwork.org/ 00061 */ 00062 00063 uint8_t AppSKey[16] = /* replace with Application Session Key in MSB format from TTN dashboard */; 00064 uint8_t NwkSKey[16] = /* replace with Network Session Key in MSB format from TTN dashboard */; 00065 uint8_t NetworkAddr[4] = /* replace with 4-byte Device Address from TTN dashboard */; 00066 00067 // Some defines for the LoRa configuration 00068 #define LORA_SF mDot::SF_7 00069 #define LORA_ACK 0 00070 #define LORA_TXPOWER 20 00071 static uint8_t config_frequency_sub_band = 2; 00072 00073 // functions for ensuring network endianness (little-endian) 00074 uint16_t hton16(const uint16_t x) 00075 { 00076 uint16_t t = x; 00077 uint8_t * a = (uint8_t*)&t; 00078 a[0] = x>>(8*1); 00079 a[1] = x>>(8*0); 00080 return t; 00081 } 00082 void hton16(uint16_t * x) 00083 { 00084 *x = hton16(*x); 00085 } 00086 00087 00088 00089 // build a transmit buffer (from https://raw.githubusercontent.com/mcci-catena/Catena4410-Sketches/master/catena4410_sensor1/catena4410_sensor1.ino) 00090 class TxBuffer_t 00091 { 00092 public: 00093 uint8_t buf[32]; // this sets the largest buffer size 00094 uint8_t *p; 00095 00096 TxBuffer_t() : p(buf) {}; 00097 void begin() 00098 { 00099 p = buf; 00100 } 00101 void put(uint8_t c) 00102 { 00103 if (p < buf + sizeof(buf)) 00104 *p++ = c; 00105 } 00106 void put1u(int32_t v) 00107 { 00108 if (v > 0xFF) 00109 v = 0xFF; 00110 else if (v < 0) 00111 v = 0; 00112 put((uint8_t) v); 00113 } 00114 void put2(uint32_t v) 00115 { 00116 if (v > 0xFFFF) 00117 v = 0xFFFF; 00118 00119 put((uint8_t) (v >> 8)); 00120 put((uint8_t) v); 00121 } 00122 void put2(int32_t v) 00123 { 00124 if (v < -0x8000) 00125 v = -0x8000; 00126 else if (v > 0x7FFF) 00127 v = 0x7FFF; 00128 00129 put2((uint32_t) v); 00130 } 00131 void put3(uint32_t v) 00132 { 00133 if (v > 0xFFFFFF) 00134 v = 0xFFFFFF; 00135 00136 put((uint8_t) (v >> 16)); 00137 put((uint8_t) (v >> 8)); 00138 put((uint8_t) v); 00139 } 00140 void put2u(int32_t v) 00141 { 00142 if (v < 0) 00143 v = 0; 00144 else if (v > 0xFFFF) 00145 v = 0xFFFF; 00146 put2((uint32_t) v); 00147 } 00148 void put3(int32_t v) 00149 { 00150 if (v < -0x800000) 00151 v = -0x800000; 00152 else if (v > 0x7FFFFF) 00153 v = 0x7FFFFF; 00154 put3((uint32_t) v); 00155 } 00156 uint8_t *getp(void) 00157 { 00158 return p; 00159 } 00160 size_t getn(void) 00161 { 00162 return p - buf; 00163 } 00164 uint8_t *getbase(void) 00165 { 00166 return buf; 00167 } 00168 void put2sf(float v) 00169 { 00170 int32_t iv; 00171 00172 if (v > 32766.5f) 00173 iv = 0x7fff; 00174 else if (v < -32767.5f) 00175 iv = -0x8000; 00176 else 00177 iv = (int32_t)(v + 0.5f); 00178 00179 put2(iv); 00180 } 00181 void put2uf(float v) 00182 { 00183 uint32_t iv; 00184 00185 if (v > 65535.5f) 00186 iv = 0xffff; 00187 else if (v < 0.5f) 00188 iv = 0; 00189 else 00190 iv = (uint32_t)(v + 0.5f); 00191 00192 put2(iv); 00193 } 00194 void put1uf(float v) 00195 { 00196 uint8_t c; 00197 00198 if (v > 254.5) 00199 c = 0xFF; 00200 else if (v < 0.5) 00201 c = 0; 00202 else 00203 c = (uint8_t) v; 00204 00205 put(c); 00206 } 00207 void putT(float T) 00208 { 00209 put2sf(T * 256.0f + 0.5f); 00210 } 00211 void putRH(float RH) 00212 { 00213 put1uf((RH / 0.390625f) + 0.5f); 00214 } 00215 void putV(float V) 00216 { 00217 put2sf(V * 4096.0f + 0.5f); 00218 } 00219 void putP(float P) 00220 { 00221 put2uf(P / 4.0f + 0.5f); 00222 } 00223 void putLux(float Lux) 00224 { 00225 put2uf(Lux); 00226 } 00227 }; 00228 00229 /* the magic byte at the front of the buffer */ 00230 enum { 00231 FormatSensor1 = 0x11, 00232 }; 00233 00234 /* the flags for the second byte of the buffer */ 00235 enum { 00236 FlagVbat = 1 << 0, 00237 FlagVcc = 1 << 1, 00238 FlagTPH = 1 << 2, 00239 FlagLux = 1 << 3, 00240 FlagWater = 1 << 4, 00241 FlagSoilTH = 1 << 5, 00242 }; 00243 00244 00245 00246 // Serial via USB for debugging only 00247 Serial pc(USBTX,USBRX); 00248 00249 int main() 00250 { 00251 TxBuffer_t b; 00252 00253 int32_t ret; 00254 mDot* dot; 00255 std::vector<uint8_t> send_data; 00256 std::vector<uint8_t> recv_data; 00257 std::vector<uint8_t> nwkSKey; 00258 std::vector<uint8_t> appSKey; 00259 std::vector<uint8_t> nodeAddr; 00260 std::vector<uint8_t> networkAddr; 00261 00262 float temperature = 0.0; 00263 00264 DigitalInOut status_led(STATUS); 00265 status_led.output(); 00266 00267 pc.baud(115200); 00268 pc.printf("TTN mDot LoRa Temperature & Humidity Sensor\n\r"); 00269 00270 // get a mDot handle 00271 dot = mDot::getInstance(); 00272 00273 // dot->setLogLevel(MTSLog::WARNING_LEVEL); 00274 dot->setLogLevel(MTSLog::TRACE_LEVEL); 00275 00276 logInfo("Checking Config"); 00277 00278 // Test if we've already saved the config 00279 std::string configNetworkName = dot->getNetworkName(); 00280 00281 uint8_t *it = NwkSKey; 00282 for (uint8_t i = 0; i<16; i++) 00283 nwkSKey.push_back((uint8_t) *it++); 00284 00285 it = AppSKey; 00286 for (uint8_t i = 0; i<16; i++) 00287 appSKey.push_back((uint8_t) *it++); 00288 00289 it = NetworkAddr; 00290 for (uint8_t i = 0; i<4; i++) 00291 networkAddr.push_back((uint8_t) *it++); 00292 00293 logInfo("Resetting Config"); 00294 // reset to default config so we know what state we're in 00295 dot->resetConfig(); 00296 00297 // Set byte order - AEP less than 1.0.30 00298 // dot->setJoinByteOrder(mDot::LSB); 00299 dot->setJoinByteOrder(mDot::MSB); // This is default for > 1.0.30 Conduit 00300 00301 00302 00303 logInfo("Set TxPower"); 00304 if((ret = dot->setTxPower( LORA_TXPOWER )) != mDot::MDOT_OK) { 00305 logError("Failed to set Tx Power %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00306 } 00307 00308 logInfo("Set Public mode"); 00309 if((ret = dot->setPublicNetwork(true)) != mDot::MDOT_OK) { 00310 logError("failed to set Public Mode %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00311 } 00312 00313 logInfo("Set MANUAL Join mode"); 00314 if((ret = dot->setJoinMode(mDot::MANUAL)) != mDot::MDOT_OK) { 00315 logError("Failed to set MANUAL Join Mode %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00316 } 00317 00318 logInfo("Set Ack"); 00319 // 1 retries on Ack, 0 to disable 00320 if((ret = dot->setAck( LORA_ACK)) != mDot::MDOT_OK) { 00321 logError("Failed to set Ack %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00322 } 00323 00324 //Not applicable for 868MHz in EU 00325 if ((ret = dot->setFrequencySubBand(config_frequency_sub_band)) != mDot::MDOT_OK) { 00326 logError("failed to set frequency sub band", ret); 00327 } 00328 00329 logInfo("Set Network Address"); 00330 if ((ret = dot->setNetworkAddress(networkAddr)) != mDot::MDOT_OK) { 00331 logError("Failed to set Network Address %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00332 } 00333 00334 logInfo("Set Data Session Key"); 00335 if ((ret = dot->setDataSessionKey(appSKey)) != mDot::MDOT_OK) { 00336 logError("Failed to set Data Session Key %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00337 } 00338 00339 logInfo("Set Network Session Key"); 00340 if ((ret = dot->setNetworkSessionKey(nwkSKey)) != mDot::MDOT_OK) { 00341 logError("Failed to set Network Session Key %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00342 } 00343 00344 logInfo("Saving Config"); 00345 // Save config 00346 if (! dot->saveConfig()) { 00347 logError("failed to save configuration"); 00348 } 00349 00350 // Display what is set 00351 std::vector<uint8_t> tmp = dot->getNetworkSessionKey(); 00352 pc.printf("Network Session Key: "); 00353 pc.printf("%s\r\n", mts::Text::bin2hexString(tmp, " ").c_str()); 00354 00355 tmp = dot->getDataSessionKey(); 00356 pc.printf("Data Session Key: "); 00357 pc.printf("%s\r\n", mts::Text::bin2hexString(tmp, " ").c_str()); 00358 00359 pc.printf("Device ID "); 00360 std::vector<uint8_t> deviceId; 00361 deviceId = dot->getDeviceId(); 00362 for (std::vector<uint8_t>::iterator it = deviceId.begin() ; it != deviceId.end(); ++it) 00363 pc.printf("%2.2x",*it ); 00364 pc.printf("\r\n"); 00365 00366 std::vector<uint8_t> netAddress; 00367 00368 pc.printf("Network Address "); 00369 netAddress = dot->getNetworkAddress(); 00370 for (std::vector<uint8_t>::iterator it = netAddress.begin() ; it != netAddress.end(); ++it) 00371 pc.printf("%2.2x",*it ); 00372 00373 pc.printf("\r\n"); 00374 00375 // Display LoRa parameters 00376 // Display label and values in different colours, show pretty values not numeric values where applicable 00377 pc.printf("Public Network: %s\r\n", (char*)(dot->getPublicNetwork() ? "Yes" : "No") ); 00378 pc.printf("Frequency: %s\r\n", (char*)mDot::FrequencyBandStr(dot->getFrequencyBand()).c_str() ); 00379 pc.printf("Sub Band: %s\r\n", (char*)mDot::FrequencySubBandStr(dot->getFrequencySubBand()).c_str() ); 00380 pc.printf("Join Mode: %s\r\n", (char*)mDot::JoinModeStr(dot->getJoinMode()).c_str() ); 00381 pc.printf("Join Retries: %d\r\n", dot->getJoinRetries() ); 00382 pc.printf("Join Byte Order: %s\r\n", (char*)(dot->getJoinByteOrder() == 0 ? "LSB" : "MSB") ); 00383 pc.printf("Link Check Count: %d\r\n", dot->getLinkCheckCount() ); 00384 pc.printf("Link Check Thold: %d\r\n", dot->getLinkCheckThreshold() ); 00385 pc.printf("Tx Data Rate: %s\r\n", (char*)mDot::DataRateStr(dot->getTxDataRate()).c_str() ); 00386 pc.printf("Tx Power: %d\r\n", dot->getTxPower() ); 00387 pc.printf("TxWait: %s, ", (dot->getTxWait() ? "Y" : "N" )); 00388 pc.printf("CRC: %s, ", (dot->getCrc() ? "Y" : "N") ); 00389 pc.printf("Ack: %s\r\n", (dot->getAck() ? "Y" : "N") ); 00390 00391 logInfo("Joining Network"); 00392 while ((ret = dot->joinNetwork()) != mDot::MDOT_OK) { 00393 logError("failed to join network [%d][%s]", ret, mDot::getReturnCodeString(ret).c_str()); 00394 wait_ms(dot->getNextTxMs() + 1); 00395 } 00396 logInfo("Joined Network"); 00397 wait_ms(500); 00398 00399 /* Setup Sensors */ 00400 00401 logInfo("Configure Soil Sensor (SHT)"); 00402 /* DigitalInOut sht_data(SHT_DATA_PIN); 00403 DigitalInOut sht_sck(SHT_SCK_PIN); 00404 sht_data.output(); 00405 sht_sck.output(); 00406 while (1) { 00407 sht_data.write(1); 00408 wait_ms(1); 00409 sht_data.write(0); 00410 wait_ms(1); 00411 }*/ 00412 00413 //logInfo("Configure Air Sensor (DHT)"); 00414 // no config needed for DHT 00415 logInfo("Configure Water Sensor (DS)"); 00416 wait_ms(500); 00417 DS18B20::ROM_Code_t ROM_Code; 00418 wait_ms(500); 00419 thermom.ReadROM(&ROM_Code); 00420 logInfo("Family code: 0x%X\n\r", ROM_Code.BYTES.familyCode); 00421 wait_ms(500); 00422 logInfo("Serial Number: "); 00423 for (unsigned i = 6; i != 0; --i) { 00424 logInfo("%02X%s", ROM_Code.BYTES.serialNo[i-1], (i != 1)?":":"\r\n"); 00425 } 00426 logInfo("CRC: 0x%X\r\n", ROM_Code.BYTES.VTV); 00427 00428 wait_ms(500); 00429 logInfo("Configure Light Sensor (TSL)"); 00430 tsl.enablePower(); 00431 00432 char dataBuf[50]; 00433 uint16_t seq = 0; 00434 char * sf_str; 00435 while( 1 ) { 00436 00437 /* cycle through spreading factors */ 00438 uint8_t sf; 00439 seq = 0; /* force SF7 */ 00440 switch (seq % 4) { 00441 case 0: 00442 sf = mDot::SF_7; 00443 sf_str = "SF7"; 00444 break; 00445 case 1: 00446 sf = mDot::SF_8; 00447 sf_str = "SF8"; 00448 break; 00449 case 2: 00450 sf = mDot::SF_9; 00451 sf_str = "SF9"; 00452 break; 00453 case 3: 00454 sf = mDot::SF_10; 00455 sf_str = "SF10"; 00456 break; 00457 } 00458 // Set Spreading Factor, higher is lower data rate, smaller packets but longer range 00459 // Lower is higher data rate, larger packets and shorter range. 00460 logInfo("Set SF: %s",sf_str); 00461 if((ret = dot->setTxDataRate( sf )) != mDot::MDOT_OK) { 00462 logError("Failed to set SF %d:%s", ret, mDot::getReturnCodeString(ret).c_str()); 00463 } 00464 00465 /* set default data values */ 00466 int temp = 0; 00467 int humid = -1; 00468 00469 /* build packet */ 00470 b.begin(); 00471 uint8_t flag = 0; 00472 b.put(FormatSensor1); 00473 uint8_t * const pFlag = b.getp(); // save pointer to flag location 00474 b.put(0x00); // placeholder for flags 00475 00476 // TODO: read battery voltage 00477 b.putV(13.8); 00478 flag |= FlagVbat; 00479 00480 // read from Bme280 sensor: 00481 float air_temp=0, air_humid=0; 00482 bool dht_success = dht.sample(); 00483 wait_ms(100); 00484 logInfo("Air Sensor Status: %s", dht_success?"OK":"ERROR"); 00485 wait_ms(100); 00486 air_temp = (float)dht.getTemperature()/10.0; 00487 air_humid = (float)dht.getHumidity()/10.0; 00488 logInfo("Air Temp: %1.01fC Air Humid: %1.01f%%", air_temp, air_humid); 00489 00490 00491 b.putT(air_temp); // air temp 00492 b.putP(1010.0); // air pressure 00493 b.putRH(air_humid); // air humidity 00494 flag |= FlagTPH; 00495 00496 wait_ms(100); 00497 // read from light sensor 00498 float lux = tsl.getLux(); 00499 logInfo("Ambient Light: %.4f", lux); 00500 wait_ms(100); 00501 b.putLux(lux*100); // ambient light 00502 flag |= FlagLux; 00503 00504 // read water temperature 00505 wait_ms(100); 00506 logInfo("Running temperature conversion..."); 00507 float water_temp = thermom.GetTemperature(); 00508 logInfo("Water Temperature: %.4fC", water_temp); 00509 wait_ms(100); 00510 b.putT(water_temp); // water temperature 00511 flag |= FlagWater; 00512 00513 // read soil sensor 00514 wait_ms(100); 00515 logInfo("sht.ready = %s", sht.ready?"true":"false"); 00516 sht.ready = true; // override error... 00517 sht.reset(); 00518 wait_ms(50); 00519 bool sht_success = sht.update(); 00520 logInfo("Soil Sensor Status: %s", sht_success?"OK":"ERROR"); 00521 float soil_temp = (float)sht.getTemperature(); 00522 float soil_humid = (float)(sht.humidity)/(float)35.0; 00523 logInfo("sht->humid = %d",sht.humidity); 00524 logInfo("Soil Temp: %1.01fC Soil Humid: %1.01f%%", soil_temp, soil_humid); 00525 b.putT(soil_temp); // soil temperature 00526 b.putRH(soil_humid); // soil humidityupdate 00527 00528 flag |= FlagSoilTH; 00529 00530 // write flag byte 00531 *pFlag = flag; 00532 00533 /* load vector */ 00534 send_data.clear(); 00535 uint8_t c; 00536 int n = b.getn(); 00537 for( int i=0; i< n; i++ ) { 00538 c = b.buf[i]; 00539 send_data.push_back( c ); 00540 } 00541 00542 wait_ms(100); 00543 /* send packet */ 00544 if ((ret = dot->send(send_data)) != mDot::MDOT_OK) { 00545 logError("failed to send: [%d][%s]", ret, mDot::getReturnCodeString(ret).c_str()); 00546 } else { 00547 logInfo("data len: %d, send data: %s", n, Text::bin2hexString(send_data).c_str()); 00548 } 00549 00550 /* sleep */ 00551 uint32_t sleep_time = MAX((dot->getNextTxMs() / 1000), 10 /* use 6000 for 10min */); 00552 logInfo("going to sleep for %d seconds", sleep_time); 00553 00554 status_led.write(1); 00555 wait_ms(1*1000); 00556 status_led.write(0); 00557 wait_ms(4*1000); 00558 00559 seq++; 00560 } 00561 00562 return 0; 00563 }
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