|
| 1 | +/* SPDX-License-Identifier: GPL-3.0 */ |
| 2 | +/* |
| 3 | + * The Cayenne Low Power Payload (LPP) provides a convenient and |
| 4 | + * easy way to send data over LPWAN networks such as LoRaWAN. The Cayenne LPP |
| 5 | + * is compliant with the payload size restriction, which can be lowered down to |
| 6 | + * 11 bytes, and allows the device to send multiple sensor data at one time. |
| 7 | + * |
| 8 | + * CayenneLPP is also support by TTN: |
| 9 | + * https://www.thethingsindustries.com/docs/integrations/payload-formatters/cayenne/ |
| 10 | + * |
| 11 | + * This code is direct from: https://github.com/myDevicesIoT/CayenneLPP |
| 12 | + * |
| 13 | + * GPL-3.0 license, see `LICENSE.GPL` |
| 14 | + * See https://github.com/myDevicesIoT/CayenneLPP for license details |
| 15 | + */ |
| 16 | + |
| 17 | +#include "CayenneLPP.h" |
| 18 | + |
| 19 | +CayenneLPP::CayenneLPP(uint8_t size) : maxsize(size) { |
| 20 | + buffer = (uint8_t*) malloc(size); |
| 21 | + cursor = 0; |
| 22 | +} |
| 23 | + |
| 24 | +CayenneLPP::~CayenneLPP(void) { |
| 25 | + free(buffer); |
| 26 | +} |
| 27 | + |
| 28 | +void CayenneLPP::reset(void) { |
| 29 | + cursor = 0; |
| 30 | +} |
| 31 | + |
| 32 | +uint8_t CayenneLPP::getSize(void) { |
| 33 | + return cursor; |
| 34 | +} |
| 35 | + |
| 36 | +uint8_t* CayenneLPP::getBuffer(void) { |
| 37 | +// uint8_t[cursor] result; |
| 38 | +// memcpy(result, buffer, cursor); |
| 39 | +// return result; |
| 40 | + return buffer; |
| 41 | +} |
| 42 | + |
| 43 | +uint8_t CayenneLPP::copy(uint8_t* dst) { |
| 44 | + memcpy(dst, buffer, cursor); |
| 45 | + return cursor; |
| 46 | +} |
| 47 | + |
| 48 | +uint8_t CayenneLPP::addDigitalInput(uint8_t channel, uint8_t value) { |
| 49 | + if ((cursor + LPP_DIGITAL_INPUT_SIZE) > maxsize) { |
| 50 | + return 0; |
| 51 | + } |
| 52 | + buffer[cursor++] = channel; |
| 53 | + buffer[cursor++] = LPP_DIGITAL_INPUT; |
| 54 | + buffer[cursor++] = value; |
| 55 | + |
| 56 | + return cursor; |
| 57 | +} |
| 58 | + |
| 59 | +uint8_t CayenneLPP::addDigitalOutput(uint8_t channel, uint8_t value) { |
| 60 | + if ((cursor + LPP_DIGITAL_OUTPUT_SIZE) > maxsize) { |
| 61 | + return 0; |
| 62 | + } |
| 63 | + buffer[cursor++] = channel; |
| 64 | + buffer[cursor++] = LPP_DIGITAL_OUTPUT; |
| 65 | + buffer[cursor++] = value; |
| 66 | + |
| 67 | + return cursor; |
| 68 | +} |
| 69 | + |
| 70 | +uint8_t CayenneLPP::addAnalogInput(uint8_t channel, float value) { |
| 71 | + if ((cursor + LPP_ANALOG_INPUT_SIZE) > maxsize) { |
| 72 | + return 0; |
| 73 | + } |
| 74 | + |
| 75 | + int16_t val = value * 100; |
| 76 | + buffer[cursor++] = channel; |
| 77 | + buffer[cursor++] = LPP_ANALOG_INPUT; |
| 78 | + buffer[cursor++] = val >> 8; |
| 79 | + buffer[cursor++] = val; |
| 80 | + |
| 81 | + return cursor; |
| 82 | +} |
| 83 | + |
| 84 | +uint8_t CayenneLPP::addAnalogOutput(uint8_t channel, float value) { |
| 85 | + if ((cursor + LPP_ANALOG_OUTPUT_SIZE) > maxsize) { |
| 86 | + return 0; |
| 87 | + } |
| 88 | + int16_t val = value * 100; |
| 89 | + buffer[cursor++] = channel; |
| 90 | + buffer[cursor++] = LPP_ANALOG_OUTPUT; |
| 91 | + buffer[cursor++] = val >> 8; |
| 92 | + buffer[cursor++] = val; |
| 93 | + |
| 94 | + return cursor; |
| 95 | +} |
| 96 | + |
| 97 | +uint8_t CayenneLPP::addLuminosity(uint8_t channel, uint16_t lux) { |
| 98 | + if ((cursor + LPP_LUMINOSITY_SIZE) > maxsize) { |
| 99 | + return 0; |
| 100 | + } |
| 101 | + buffer[cursor++] = channel; |
| 102 | + buffer[cursor++] = LPP_LUMINOSITY; |
| 103 | + buffer[cursor++] = lux >> 8; |
| 104 | + buffer[cursor++] = lux; |
| 105 | + |
| 106 | + return cursor; |
| 107 | +} |
| 108 | + |
| 109 | +uint8_t CayenneLPP::addPresence(uint8_t channel, uint8_t value) { |
| 110 | + if ((cursor + LPP_PRESENCE_SIZE) > maxsize) { |
| 111 | + return 0; |
| 112 | + } |
| 113 | + buffer[cursor++] = channel; |
| 114 | + buffer[cursor++] = LPP_PRESENCE; |
| 115 | + buffer[cursor++] = value; |
| 116 | + |
| 117 | + return cursor; |
| 118 | +} |
| 119 | + |
| 120 | +uint8_t CayenneLPP::addTemperature(uint8_t channel, float celsius) { |
| 121 | + if ((cursor + LPP_TEMPERATURE_SIZE) > maxsize) { |
| 122 | + return 0; |
| 123 | + } |
| 124 | + int16_t val = celsius * 10; |
| 125 | + buffer[cursor++] = channel; |
| 126 | + buffer[cursor++] = LPP_TEMPERATURE; |
| 127 | + buffer[cursor++] = val >> 8; |
| 128 | + buffer[cursor++] = val; |
| 129 | + |
| 130 | + return cursor; |
| 131 | +} |
| 132 | + |
| 133 | +uint8_t CayenneLPP::addRelativeHumidity(uint8_t channel, float rh) { |
| 134 | + if ((cursor + LPP_RELATIVE_HUMIDITY_SIZE) > maxsize) { |
| 135 | + return 0; |
| 136 | + } |
| 137 | + buffer[cursor++] = channel; |
| 138 | + buffer[cursor++] = LPP_RELATIVE_HUMIDITY; |
| 139 | + buffer[cursor++] = rh * 2; |
| 140 | + |
| 141 | + return cursor; |
| 142 | +} |
| 143 | + |
| 144 | +uint8_t CayenneLPP::addAccelerometer(uint8_t channel, float x, float y, float z) { |
| 145 | + if ((cursor + LPP_ACCELEROMETER_SIZE) > maxsize) { |
| 146 | + return 0; |
| 147 | + } |
| 148 | + int16_t vx = x * 1000; |
| 149 | + int16_t vy = y * 1000; |
| 150 | + int16_t vz = z * 1000; |
| 151 | + |
| 152 | + buffer[cursor++] = channel; |
| 153 | + buffer[cursor++] = LPP_ACCELEROMETER; |
| 154 | + buffer[cursor++] = vx >> 8; |
| 155 | + buffer[cursor++] = vx; |
| 156 | + buffer[cursor++] = vy >> 8; |
| 157 | + buffer[cursor++] = vy; |
| 158 | + buffer[cursor++] = vz >> 8; |
| 159 | + buffer[cursor++] = vz; |
| 160 | + |
| 161 | + return cursor; |
| 162 | +} |
| 163 | + |
| 164 | +uint8_t CayenneLPP::addBarometricPressure(uint8_t channel, float hpa) { |
| 165 | + if ((cursor + LPP_BAROMETRIC_PRESSURE_SIZE) > maxsize) { |
| 166 | + return 0; |
| 167 | + } |
| 168 | + int16_t val = hpa * 10; |
| 169 | + |
| 170 | + buffer[cursor++] = channel; |
| 171 | + buffer[cursor++] = LPP_BAROMETRIC_PRESSURE; |
| 172 | + buffer[cursor++] = val >> 8; |
| 173 | + buffer[cursor++] = val; |
| 174 | + |
| 175 | + return cursor; |
| 176 | +} |
| 177 | + |
| 178 | +uint8_t CayenneLPP::addGyrometer(uint8_t channel, float x, float y, float z) { |
| 179 | + if ((cursor + LPP_GYROMETER_SIZE) > maxsize) { |
| 180 | + return 0; |
| 181 | + } |
| 182 | + int16_t vx = x * 100; |
| 183 | + int16_t vy = y * 100; |
| 184 | + int16_t vz = z * 100; |
| 185 | + |
| 186 | + buffer[cursor++] = channel; |
| 187 | + buffer[cursor++] = LPP_GYROMETER; |
| 188 | + buffer[cursor++] = vx >> 8; |
| 189 | + buffer[cursor++] = vx; |
| 190 | + buffer[cursor++] = vy >> 8; |
| 191 | + buffer[cursor++] = vy; |
| 192 | + buffer[cursor++] = vz >> 8; |
| 193 | + buffer[cursor++] = vz; |
| 194 | + |
| 195 | + return cursor; |
| 196 | +} |
| 197 | + |
| 198 | +uint8_t CayenneLPP::addGPS(uint8_t channel, float latitude, float longitude, float meters) { |
| 199 | + if ((cursor + LPP_GPS_SIZE) > maxsize) { |
| 200 | + return 0; |
| 201 | + } |
| 202 | + int32_t lat = latitude * 10000; |
| 203 | + int32_t lon = longitude * 10000; |
| 204 | + int32_t alt = meters * 100; |
| 205 | + |
| 206 | + buffer[cursor++] = channel; |
| 207 | + buffer[cursor++] = LPP_GPS; |
| 208 | + |
| 209 | + buffer[cursor++] = lat >> 16; |
| 210 | + buffer[cursor++] = lat >> 8; |
| 211 | + buffer[cursor++] = lat; |
| 212 | + buffer[cursor++] = lon >> 16; |
| 213 | + buffer[cursor++] = lon >> 8; |
| 214 | + buffer[cursor++] = lon; |
| 215 | + buffer[cursor++] = alt >> 16; |
| 216 | + buffer[cursor++] = alt >> 8; |
| 217 | + buffer[cursor++] = alt; |
| 218 | + |
| 219 | + return cursor; |
| 220 | +} |
0 commit comments