├── .gitignore ├── LICENSE ├── README.md ├── examples └── cayennelpp.ino ├── library.properties └── src ├── CayenneLPP.cpp └── CayenneLPP.h /.gitignore: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/myDevicesIoT/CayenneLPP/e8cca2ccf2a62571741777c518d0044cac2bbf65/.gitignore -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## Cayenne Low Power Payload 2 | 3 | ### Overview 4 | 5 | The Cayenne Low Power Payload (LPP) provides a convenient and easy way to send data over LPWAN networks such as LoRaWAN. The Cayenne LPP is compliant with the payload size restriction, which can be lowered down to 11 bytes, and allows the device to send multiple sensor data at one time. 6 | 7 | Additionally, the Cayenne LPP allows the device to send different sensor data in different frames. In order to do that, each sensor data must be prefixed with two bytes: 8 | 9 | - **Data Channel:** Uniquely identifies each sensor in the device across frames, eg. “indoor sensor” 10 | - **Data Type:** Identifies the data type in the frame, eg. “temperature”. 11 | 12 | ### Payload structure 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 |
1 Byte1 ByteN Bytes1 Byte1 ByteM Bytes ...
Data1 Ch.Data1 TypeData1Data2 Ch.Data2 TypeData2...
35 | 36 | ### Data Types 37 | 38 | Data Types conform to the IPSO Alliance Smart Objects Guidelines, which identifies each data type with an “Object ID”. However, as shown below, a conversion is made to fit the Object ID into a single byte. 39 | 40 | ``` 41 | LPP_DATA_TYPE = IPSO_OBJECT_ID - 3200 42 | ``` 43 | 44 | Each data type can use 1 or more bytes to send the data according to the following table. 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 | 141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 |
TypeIPSOLPPHexData SizeData Resolution per bit
Digital Input32000011
Digital Output32011111
Analog Input32022220.01 Signed
Analog Output32033320.01 Signed
Illuminance Sensor33011016521 Lux Unsigned MSB
Presence Sensor33021026611
Temperature Sensor33031036720.1 °C Signed MSB
Humidity Sensor33041046810.5 % Unsigned
Accelerometer33131137160.001 G Signed MSB per axis
Barometer33151157320.1 hPa Unsigned MSB
Gyrometer33341348660.01 °/s Signed MSB per axis
GPS Location3336136889Latitude : 0.0001 ° Signed MSB
Longitude : 0.0001 ° Signed MSB
Altitude : 0.01 meter Signed MSB
160 | 161 | ### Examples 162 | 163 | #### Device with 2 temperature sensors 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 |
Payload (Hex)03 67 01 10 05 67 00 FF
Data ChannelTypeValue
03 ⇒ 367 ⇒ Temperature0110 = 272 ⇒ 27.2°C
05 ⇒ 567 ⇒ Temperature00FF = 255 ⇒ 25.5°C
188 | 189 | #### Device with temperature and acceleration sensors 190 | 191 | **Frame N** 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 |
Payload (Hex)01 67 FF D7
Data ChannelTypeValue
01 ⇒ 167 ⇒ TemperatureFFD7 = -41 ⇒ -4.1°C
210 | 211 | **Frame N+1** 212 | 213 | 214 | 215 | 216 | 217 | 218 | 219 | 220 | 221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 230 | 231 | 232 | 233 | 234 | 235 |
Payload (Hex)06 71 04 D2 FB 2E 00 00
Data ChannelTypeValue
06 ⇒ 671 ⇒ AccelerometerX: 04D2 = +1234 ⇒ +1.234G
Y: FB2E = -1234 ⇒ -1.234G
Z: 0000 = 0 ⇒ 0G
236 | 237 | # Example use 238 | ``` 239 | #include 'CayenneLPP.h'; 240 | 241 | #define MAX_SIZE 200; // depends on spreading factor and frequency used 242 | 243 | CayenneLPP Payload(MAX_SIZE); 244 | 245 | float celsius = -4.1; 246 | float accel[] = {1.234, -1.234, 0}; 247 | float rh = 30; 248 | float hpa = 1014.1; 249 | float latitude = 42.3519; 250 | float longitude = -87.9094; 251 | float altitude:10 252 | 253 | int size = 0; 254 | 255 | Payload.reset(); 256 | size = Payload.addTemperature(0, celsius); 257 | 258 | if (size == 0) { 259 | // not enough byte left to add the data 260 | } 261 | 262 | else { 263 | // add function returned current payload size 264 | } 265 | 266 | 267 | Payload.addAccelerometer(1, accel[0], accel[1], accel[2]); 268 | Payload.addRelativeHumidity(3, rh); 269 | Payload.addBarometricPressure(4, hpa); 270 | Payload.addGPS(5, latitude, longitude, altitude); 271 | 272 | // Call LoRaWAN library to send the frame 273 | LORA_SEND(Payload.getBuffer(), Payload.getSize()); 274 | ``` 275 | -------------------------------------------------------------------------------- /examples/cayennelpp.ino: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/myDevicesIoT/CayenneLPP/e8cca2ccf2a62571741777c518d0044cac2bbf65/examples/cayennelpp.ino -------------------------------------------------------------------------------- /library.properties: -------------------------------------------------------------------------------- 1 | name=CayenneLPP 2 | version=1.0.0 3 | author=myDevices 4 | maintainer=myDevices 5 | sentence=CayenneLPP for LoRA or non-Lora devices payload. 6 | paragraph=Cayenne Low Power Payload for LoRA or non-Lora devices payload. 7 | category=Communication 8 | url=http://www.mydevices.com/cayenne 9 | architectures=* -------------------------------------------------------------------------------- /src/CayenneLPP.cpp: -------------------------------------------------------------------------------- 1 | #include "CayenneLPP.h" 2 | 3 | CayenneLPP::CayenneLPP(uint8_t size) : maxsize(size) { 4 | buffer = (uint8_t*) malloc(size); 5 | cursor = 0; 6 | } 7 | 8 | CayenneLPP::~CayenneLPP(void) { 9 | free(buffer); 10 | } 11 | 12 | void CayenneLPP::reset(void) { 13 | cursor = 0; 14 | } 15 | 16 | uint8_t CayenneLPP::getSize(void) { 17 | return cursor; 18 | } 19 | 20 | uint8_t* CayenneLPP::getBuffer(void) { 21 | // uint8_t[cursor] result; 22 | // memcpy(result, buffer, cursor); 23 | // return result; 24 | return buffer; 25 | } 26 | 27 | uint8_t CayenneLPP::copy(uint8_t* dst) { 28 | memcpy(dst, buffer, cursor); 29 | return cursor; 30 | } 31 | 32 | uint8_t CayenneLPP::addDigitalInput(uint8_t channel, uint8_t value) { 33 | if ((cursor + LPP_DIGITAL_INPUT_SIZE) > maxsize) { 34 | return 0; 35 | } 36 | buffer[cursor++] = channel; 37 | buffer[cursor++] = LPP_DIGITAL_INPUT; 38 | buffer[cursor++] = value; 39 | 40 | return cursor; 41 | } 42 | 43 | uint8_t CayenneLPP::addDigitalOutput(uint8_t channel, uint8_t value) { 44 | if ((cursor + LPP_DIGITAL_OUTPUT_SIZE) > maxsize) { 45 | return 0; 46 | } 47 | buffer[cursor++] = channel; 48 | buffer[cursor++] = LPP_DIGITAL_OUTPUT; 49 | buffer[cursor++] = value; 50 | 51 | return cursor; 52 | } 53 | 54 | uint8_t CayenneLPP::addAnalogInput(uint8_t channel, float value) { 55 | if ((cursor + LPP_ANALOG_INPUT_SIZE) > maxsize) { 56 | return 0; 57 | } 58 | 59 | int16_t val = value * 100; 60 | buffer[cursor++] = channel; 61 | buffer[cursor++] = LPP_ANALOG_INPUT; 62 | buffer[cursor++] = val >> 8; 63 | buffer[cursor++] = val; 64 | 65 | return cursor; 66 | } 67 | 68 | uint8_t CayenneLPP::addAnalogOutput(uint8_t channel, float value) { 69 | if ((cursor + LPP_ANALOG_OUTPUT_SIZE) > maxsize) { 70 | return 0; 71 | } 72 | int16_t val = value * 100; 73 | buffer[cursor++] = channel; 74 | buffer[cursor++] = LPP_ANALOG_OUTPUT; 75 | buffer[cursor++] = val >> 8; 76 | buffer[cursor++] = val; 77 | 78 | return cursor; 79 | } 80 | 81 | uint8_t CayenneLPP::addLuminosity(uint8_t channel, uint16_t lux) { 82 | if ((cursor + LPP_LUMINOSITY_SIZE) > maxsize) { 83 | return 0; 84 | } 85 | buffer[cursor++] = channel; 86 | buffer[cursor++] = LPP_LUMINOSITY; 87 | buffer[cursor++] = lux >> 8; 88 | buffer[cursor++] = lux; 89 | 90 | return cursor; 91 | } 92 | 93 | uint8_t CayenneLPP::addPresence(uint8_t channel, uint8_t value) { 94 | if ((cursor + LPP_PRESENCE_SIZE) > maxsize) { 95 | return 0; 96 | } 97 | buffer[cursor++] = channel; 98 | buffer[cursor++] = LPP_PRESENCE; 99 | buffer[cursor++] = value; 100 | 101 | return cursor; 102 | } 103 | 104 | uint8_t CayenneLPP::addTemperature(uint8_t channel, float celsius) { 105 | if ((cursor + LPP_TEMPERATURE_SIZE) > maxsize) { 106 | return 0; 107 | } 108 | int16_t val = celsius * 10; 109 | buffer[cursor++] = channel; 110 | buffer[cursor++] = LPP_TEMPERATURE; 111 | buffer[cursor++] = val >> 8; 112 | buffer[cursor++] = val; 113 | 114 | return cursor; 115 | } 116 | 117 | uint8_t CayenneLPP::addRelativeHumidity(uint8_t channel, float rh) { 118 | if ((cursor + LPP_RELATIVE_HUMIDITY_SIZE) > maxsize) { 119 | return 0; 120 | } 121 | buffer[cursor++] = channel; 122 | buffer[cursor++] = LPP_RELATIVE_HUMIDITY; 123 | buffer[cursor++] = rh * 2; 124 | 125 | return cursor; 126 | } 127 | 128 | uint8_t CayenneLPP::addAccelerometer(uint8_t channel, float x, float y, float z) { 129 | if ((cursor + LPP_ACCELEROMETER_SIZE) > maxsize) { 130 | return 0; 131 | } 132 | int16_t vx = x * 1000; 133 | int16_t vy = y * 1000; 134 | int16_t vz = z * 1000; 135 | 136 | buffer[cursor++] = channel; 137 | buffer[cursor++] = LPP_ACCELEROMETER; 138 | buffer[cursor++] = vx >> 8; 139 | buffer[cursor++] = vx; 140 | buffer[cursor++] = vy >> 8; 141 | buffer[cursor++] = vy; 142 | buffer[cursor++] = vz >> 8; 143 | buffer[cursor++] = vz; 144 | 145 | return cursor; 146 | } 147 | 148 | uint8_t CayenneLPP::addBarometricPressure(uint8_t channel, float hpa) { 149 | if ((cursor + LPP_BAROMETRIC_PRESSURE_SIZE) > maxsize) { 150 | return 0; 151 | } 152 | int16_t val = hpa * 10; 153 | 154 | buffer[cursor++] = channel; 155 | buffer[cursor++] = LPP_BAROMETRIC_PRESSURE; 156 | buffer[cursor++] = val >> 8; 157 | buffer[cursor++] = val; 158 | 159 | return cursor; 160 | } 161 | 162 | uint8_t CayenneLPP::addGyrometer(uint8_t channel, float x, float y, float z) { 163 | if ((cursor + LPP_GYROMETER_SIZE) > maxsize) { 164 | return 0; 165 | } 166 | int16_t vx = x * 100; 167 | int16_t vy = y * 100; 168 | int16_t vz = z * 100; 169 | 170 | buffer[cursor++] = channel; 171 | buffer[cursor++] = LPP_GYROMETER; 172 | buffer[cursor++] = vx >> 8; 173 | buffer[cursor++] = vx; 174 | buffer[cursor++] = vy >> 8; 175 | buffer[cursor++] = vy; 176 | buffer[cursor++] = vz >> 8; 177 | buffer[cursor++] = vz; 178 | 179 | return cursor; 180 | } 181 | 182 | uint8_t CayenneLPP::addGPS(uint8_t channel, float latitude, float longitude, float meters) { 183 | if ((cursor + LPP_GPS_SIZE) > maxsize) { 184 | return 0; 185 | } 186 | int32_t lat = latitude * 10000; 187 | int32_t lon = longitude * 10000; 188 | int32_t alt = meters * 100; 189 | 190 | buffer[cursor++] = channel; 191 | buffer[cursor++] = LPP_GPS; 192 | 193 | buffer[cursor++] = lat >> 16; 194 | buffer[cursor++] = lat >> 8; 195 | buffer[cursor++] = lat; 196 | buffer[cursor++] = lon >> 16; 197 | buffer[cursor++] = lon >> 8; 198 | buffer[cursor++] = lon; 199 | buffer[cursor++] = alt >> 16; 200 | buffer[cursor++] = alt >> 8; 201 | buffer[cursor++] = alt; 202 | 203 | return cursor; 204 | } 205 | 206 | -------------------------------------------------------------------------------- /src/CayenneLPP.h: -------------------------------------------------------------------------------- 1 | #ifndef _CAYENNE_LPP_H_ 2 | #define _CAYENNE_LPP_H_ 3 | 4 | #define LPP_DIGITAL_INPUT 0 // 1 byte 5 | #define LPP_DIGITAL_OUTPUT 1 // 1 byte 6 | #define LPP_ANALOG_INPUT 2 // 2 bytes, 0.01 signed 7 | #define LPP_ANALOG_OUTPUT 3 // 2 bytes, 0.01 signed 8 | #define LPP_LUMINOSITY 101 // 2 bytes, 1 lux unsigned 9 | #define LPP_PRESENCE 102 // 1 byte, 1 10 | #define LPP_TEMPERATURE 103 // 2 bytes, 0.1°C signed 11 | #define LPP_RELATIVE_HUMIDITY 104 // 1 byte, 0.5% unsigned 12 | #define LPP_ACCELEROMETER 113 // 2 bytes per axis, 0.001G 13 | #define LPP_BAROMETRIC_PRESSURE 115 // 2 bytes 0.1 hPa Unsigned 14 | #define LPP_GYROMETER 134 // 2 bytes per axis, 0.01 °/s 15 | #define LPP_GPS 136 // 3 byte lon/lat 0.0001 °, 3 bytes alt 0.01 meter 16 | 17 | 18 | // Data ID + Data Type + Data Size 19 | #define LPP_DIGITAL_INPUT_SIZE 3 // 1 byte 20 | #define LPP_DIGITAL_OUTPUT_SIZE 3 // 1 byte 21 | #define LPP_ANALOG_INPUT_SIZE 4 // 2 bytes, 0.01 signed 22 | #define LPP_ANALOG_OUTPUT_SIZE 4 // 2 bytes, 0.01 signed 23 | #define LPP_LUMINOSITY_SIZE 4 // 2 bytes, 1 lux unsigned 24 | #define LPP_PRESENCE_SIZE 3 // 1 byte, 1 25 | #define LPP_TEMPERATURE_SIZE 4 // 2 bytes, 0.1°C signed 26 | #define LPP_RELATIVE_HUMIDITY_SIZE 3 // 1 byte, 0.5% unsigned 27 | #define LPP_ACCELEROMETER_SIZE 8 // 2 bytes per axis, 0.001G 28 | #define LPP_BAROMETRIC_PRESSURE_SIZE 4 // 2 bytes 0.1 hPa Unsigned 29 | #define LPP_GYROMETER_SIZE 8 // 2 bytes per axis, 0.01 °/s 30 | #define LPP_GPS_SIZE 11 // 3 byte lon/lat 0.0001 °, 3 bytes alt 0.01 meter 31 | 32 | 33 | class CayenneLPP { 34 | public: 35 | CayenneLPP(uint8_t size); 36 | ~CayenneLPP(); 37 | 38 | void reset(void); 39 | uint8_t getSize(void); 40 | uint8_t* getBuffer(void); 41 | uint8_t copy(uint8_t* buffer); 42 | 43 | uint8_t addDigitalInput(uint8_t channel, uint8_t value); 44 | uint8_t addDigitalOutput(uint8_t channel, uint8_t value); 45 | 46 | uint8_t addAnalogInput(uint8_t channel, float value); 47 | uint8_t addAnalogOutput(uint8_t channel, float value); 48 | 49 | uint8_t addLuminosity(uint8_t channel, uint16_t lux); 50 | uint8_t addPresence(uint8_t channel, uint8_t value); 51 | uint8_t addTemperature(uint8_t channel, float celsius); 52 | uint8_t addRelativeHumidity(uint8_t channel, float rh); 53 | uint8_t addAccelerometer(uint8_t channel, float x, float y, float z); 54 | uint8_t addBarometricPressure(uint8_t channel, float hpa); 55 | uint8_t addGyrometer(uint8_t channel, float x, float y, float z); 56 | uint8_t addGPS(uint8_t channel, float latitude, float longitude, float meters); 57 | 58 | private: 59 | uint8_t *buffer; 60 | uint8_t maxsize; 61 | uint8_t cursor; 62 | 63 | 64 | }; 65 | 66 | 67 | #endif --------------------------------------------------------------------------------