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really still wip

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This commit is contained in:
Bruno Rybársky
2025-12-28 12:23:11 +01:00
parent a48ef9d5e0
commit 31dda62474
33 changed files with 1721 additions and 589 deletions
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250
User/lib/adc/temperature.c Normal file
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/********************************** (C) COPYRIGHT *******************************
* File Name : temperature.c
* Author : WCH
* Version : V1.0.0
* Date : 2023/11/17
* Description : Temperature program body.
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/
/*
*@Note
*Internal temperature sensor routine:
*Through the ADC channel 16, the output voltage value and temperature value of the internal
*temperature sensor are collected.
*
*/
#include "debug.h"
#include "lib/telemetry/telemetry.h"
/* Global Variable */
s16 Calibrattion_Val = 0;
/*********************************************************************
* @fn ADC_Function_Init
*
* @brief Initializes ADC collection.
*
* @return none
*/
void ADC_Function_Init(void)
{
ADC_InitTypeDef ADC_InitStructure={0};
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE );
RCC_ADCCLKConfig(RCC_PCLK2_Div8);
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_Cmd(ADC1, ENABLE);
ADC_BufferCmd(ADC1, DISABLE); //disable buffer
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
Calibrattion_Val = Get_CalibrationValue(ADC1);
ADC_BufferCmd(ADC1, ENABLE); //enable buffer
ADC_TempSensorVrefintCmd(ENABLE);
}
/*********************************************************************
* @fn Get_ADC_Val
*
* @brief Returns ADCx conversion result data.
*
* @param ch - ADC channel.
* ADC_Channel_0 - ADC Channel0 selected.
* ADC_Channel_1 - ADC Channel1 selected.
* ADC_Channel_2 - ADC Channel2 selected.
* ADC_Channel_3 - ADC Channel3 selected.
* ADC_Channel_4 - ADC Channel4 selected.
* ADC_Channel_5 - ADC Channel5 selected.
* ADC_Channel_6 - ADC Channel6 selected.
* ADC_Channel_7 - ADC Channel7 selected.
* ADC_Channel_8 - ADC Channel8 selected.
* ADC_Channel_9 - ADC Channel9 selected.
* ADC_Channel_10 - ADC Channel10 selected.
* ADC_Channel_11 - ADC Channel11 selected.
* ADC_Channel_12 - ADC Channel12 selected.
* ADC_Channel_13 - ADC Channel13 selected.
* ADC_Channel_14 - ADC Channel14 selected.
* ADC_Channel_15 - ADC Channel15 selected.
* ADC_Channel_16 - ADC Channel16 selected.
* ADC_Channel_17 - ADC Channel17 selected.
*
* @return none
*/
u16 Get_ADC_Val(u8 ch)
{
u16 val;
ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 );
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
val = ADC_GetConversionValue(ADC1);
return val;
}
/*********************************************************************
* @fn Get_ADC_Average
*
* @brief Returns ADCx conversion result average data.
*
* @param ch - ADC channel.
* ADC_Channel_0 - ADC Channel0 selected.
* ADC_Channel_1 - ADC Channel1 selected.
* ADC_Channel_2 - ADC Channel2 selected.
* ADC_Channel_3 - ADC Channel3 selected.
* ADC_Channel_4 - ADC Channel4 selected.
* ADC_Channel_5 - ADC Channel5 selected.
* ADC_Channel_6 - ADC Channel6 selected.
* ADC_Channel_7 - ADC Channel7 selected.
* ADC_Channel_8 - ADC Channel8 selected.
* ADC_Channel_9 - ADC Channel9 selected.
* ADC_Channel_10 - ADC Channel10 selected.
* ADC_Channel_11 - ADC Channel11 selected.
* ADC_Channel_12 - ADC Channel12 selected.
* ADC_Channel_13 - ADC Channel13 selected.
* ADC_Channel_14 - ADC Channel14 selected.
* ADC_Channel_15 - ADC Channel15 selected.
* ADC_Channel_16 - ADC Channel16 selected.
* ADC_Channel_17 - ADC Channel17 selected.
*
* @return val - The Data conversion value.
*/
u16 Get_ADC_Average(u8 ch,u8 times)
{
u32 temp_val=0;
u8 t;
u16 val;
for(t=0;t<times;t++)
{
temp_val+=Get_ADC_Val(ch);
Delay_Ms(5);
}
val = temp_val/times;
return val;
}
/*********************************************************************
* @fn Get_ConversionVal
*
* @brief Get Conversion Value.
*
* @param val - Sampling value
*
* @return val+Calibrattion_Val - Conversion Value.
*/
u16 Get_ConversionVal(s16 val)
{
if((val+Calibrattion_Val)<0|| val==0) return 0;
if((Calibrattion_Val+val)>4095||val==4095) return 4095;
return (val+Calibrattion_Val);
}
s32 TempSensor_Volt_To_Temper_x10(s32 Value)
{
s32 Temper_x10;
s32 Refer_Volt, Refer_Temper;
s32 k = 43; // slope in mV/¡ãC
// Read factory calibration values
Refer_Volt = (s32)((*(u32 *)0x1FFFF720) & 0x0000FFFF); // mV at reference temp
Refer_Temper = (s32)(((*(u32 *)0x1FFFF720) >> 16) & 0x0000FFFF); // ¡ãC
// Compute temperature in decicelsius
// Formula: T_x10 = Tref*10 - ((V - Vref)*100 + k/2) / k
// Multiply (V - Vref) by 100 to get tenths of ¡ãC
Temper_x10 = Refer_Temper * 10 - ((Value - Refer_Volt) * 100 + (k / 2)) / k;
return Temper_x10;
}
s32 getTemperature(void)
{
u16 ADC_val;
s32 val_mv;
ADC_val = Get_ADC_Average( ADC_Channel_TempSensor, 10 );
ADC_val = Get_ConversionVal(ADC_val);
val_mv = (ADC_val*3300/4096);
return TempSensor_Volt_To_Temper(val_mv);
}
s16 getDeciTemperature(void)
{
u16 ADC_val;
s32 val_mv;
ADC_val = Get_ADC_Average( ADC_Channel_TempSensor, 10 );
ADC_val = Get_ConversionVal(ADC_val);
val_mv = (ADC_val*3300/4096);
s32 temp_x10 = TempSensor_Volt_To_Temper_x10(val_mv);
int16_t temp16 = (int16_t)temp_x10; // store in 2 bytes
return temp16;
}
s32 getVoltage(void)
{
u16 ADC_val;
s32 val_mv;
ADC_val = Get_ADC_Average( ADC_Channel_0, 10 );
ADC_val = Get_ConversionVal(ADC_val);
val_mv = (ADC_val*3300/4096);
return val_mv;
}
// Helper: convert signed 24-bit int to 3 bytes (big-endian)
void int24_to_bytes(int32_t value, uint8_t *bytes) {
if (value < 0) value += 0x1000000; // 2's complement for 24-bit
bytes[0] = (value >> 16) & 0xFF;
bytes[1] = (value >> 8) & 0xFF;
bytes[2] = value & 0xFF;
}
// Encode GPS into CayenneLPP payload
void encode_gps(uint8_t channel, float lat, float lon, float alt, uint8_t *payload) {
payload[0] = channel;
payload[1] = LPP_GPS; // GPS type
int32_t latInt = lat * 10000;
int32_t lonInt = lon * 10000;
int32_t altInt = alt * 100;
int24_to_bytes(latInt, &payload[2]);
int24_to_bytes(lonInt, &payload[5]);
int24_to_bytes(altInt, &payload[8]);
}

113
User/lib/adc/temperature.h Normal file
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#ifndef TEMPERATURE_HEADER
#define TEMPERATURE_HEADER
/********************************** (C) COPYRIGHT *******************************
* File Name : temperature.c
* Author : WCH
* Version : V1.0.0
* Date : 2023/11/17
* Description : Temperature program body.
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/
/*
*@Note
*Internal temperature sensor routine:
*Through the ADC channel 16, the output voltage value and temperature value of the internal
*temperature sensor are collected.
*
*/
/* Global Variable */
extern s16 Calibrattion_Val;
/*********************************************************************
* @fn ADC_Function_Init
*
* @brief Initializes ADC collection.
*
* @return none
*/
void ADC_Function_Init(void);
/*********************************************************************
* @fn Get_ADC_Val
*
* @brief Returns ADCx conversion result data.
*
* @param ch - ADC channel.
* ADC_Channel_0 - ADC Channel0 selected.
* ADC_Channel_1 - ADC Channel1 selected.
* ADC_Channel_2 - ADC Channel2 selected.
* ADC_Channel_3 - ADC Channel3 selected.
* ADC_Channel_4 - ADC Channel4 selected.
* ADC_Channel_5 - ADC Channel5 selected.
* ADC_Channel_6 - ADC Channel6 selected.
* ADC_Channel_7 - ADC Channel7 selected.
* ADC_Channel_8 - ADC Channel8 selected.
* ADC_Channel_9 - ADC Channel9 selected.
* ADC_Channel_10 - ADC Channel10 selected.
* ADC_Channel_11 - ADC Channel11 selected.
* ADC_Channel_12 - ADC Channel12 selected.
* ADC_Channel_13 - ADC Channel13 selected.
* ADC_Channel_14 - ADC Channel14 selected.
* ADC_Channel_15 - ADC Channel15 selected.
* ADC_Channel_16 - ADC Channel16 selected.
* ADC_Channel_17 - ADC Channel17 selected.
*
* @return none
*/
u16 Get_ADC_Val(u8 ch);
/*********************************************************************
* @fn Get_ADC_Average
*
* @brief Returns ADCx conversion result average data.
*
* @param ch - ADC channel.
* ADC_Channel_0 - ADC Channel0 selected.
* ADC_Channel_1 - ADC Channel1 selected.
* ADC_Channel_2 - ADC Channel2 selected.
* ADC_Channel_3 - ADC Channel3 selected.
* ADC_Channel_4 - ADC Channel4 selected.
* ADC_Channel_5 - ADC Channel5 selected.
* ADC_Channel_6 - ADC Channel6 selected.
* ADC_Channel_7 - ADC Channel7 selected.
* ADC_Channel_8 - ADC Channel8 selected.
* ADC_Channel_9 - ADC Channel9 selected.
* ADC_Channel_10 - ADC Channel10 selected.
* ADC_Channel_11 - ADC Channel11 selected.
* ADC_Channel_12 - ADC Channel12 selected.
* ADC_Channel_13 - ADC Channel13 selected.
* ADC_Channel_14 - ADC Channel14 selected.
* ADC_Channel_15 - ADC Channel15 selected.
* ADC_Channel_16 - ADC Channel16 selected.
* ADC_Channel_17 - ADC Channel17 selected.
*
* @return val - The Data conversion value.
*/
u16 Get_ADC_Average(u8 ch,u8 times);
/*********************************************************************
* @fn Get_ConversionVal
*
* @brief Get Conversion Value.
*
* @param val - Sampling value
*
* @return val+Calibrattion_Val - Conversion Value.
*/
u16 Get_ConversionVal(s16 val);
s32 getTemperature(void);
s16 getDeciTemperature(void);
s32 getVoltage(void);
void encode_gps(uint8_t channel, float lat, float lon, float alt, uint8_t *payload);
#endif

33
User/lib/config.h
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@@ -9,32 +9,23 @@
#define AESKeyCount 8
#define CONTACT_COUNT 100
typedef struct {
char name[32];
unsigned char pubKey[32];
unsigned char secret[32];
int32_t gps_latitude;
int32_t gps_longitude;
Path path;
uint8_t flags;
uint8_t type;
uint8_t authenticated;
uint32_t last_seen_rt; //remote timestamp
uint32_t last_seen_lt; //local timestamp
uint32_t sync_timestamp;
} NodeEntry;
typedef struct {
uint32_t magic; // e.g. 0xDEADBEEF
uint8_t privkey[32]; // Ed25519 private
uint8_t pubkey[32]; // Ed25519 public
uint8_t nodeType;
int32_t latitude;
int32_t longitude;
int32_t altitude;
int8_t txPowerInDbm;
uint32_t frequencyInHz;
uint8_t spreadingFactor;
uint8_t bandwidth;
uint8_t codingRate;
uint16_t preambleLength;
float tcxoVoltage;
uint8_t aesKeys[AESKeyCount][17];
uint8_t password[16];
char nodeName[32];

31
User/lib/ed25519/ed_25519.h
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@@ -4,34 +4,21 @@
// Nightcracker's Ed25519 - https://github.com/orlp/ed25519
#include <stddef.h>
#if defined(_WIN32)
#if defined(ED25519_BUILD_DLL)
#define ED25519_DECLSPEC __declspec(dllexport)
#elif defined(ED25519_DLL)
#define ED25519_DECLSPEC __declspec(dllimport)
#else
#define ED25519_DECLSPEC
#endif
#else
#define ED25519_DECLSPEC
#endif
#include "meshcore/packetstructs.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifndef ED25519_NO_SEED
int ED25519_DECLSPEC ed25519_create_seed(unsigned char *seed);
#endif
void ED25519_DECLSPEC ed25519_create_keypair(unsigned char *public_key, unsigned char *private_key, const unsigned char *seed);
void ED25519_DECLSPEC ed25519_derive_pub(unsigned char *public_key, const unsigned char *private_key);
void ED25519_DECLSPEC ed25519_sign(unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key, const unsigned char *private_key);
int ED25519_DECLSPEC ed25519_verify(const unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key);
void ED25519_DECLSPEC ed25519_add_scalar(unsigned char *public_key, unsigned char *private_key, const unsigned char *scalar);
void ED25519_DECLSPEC ed25519_key_exchange(unsigned char *shared_secret, const unsigned char *public_key, const unsigned char *private_key);
void ed25519_create_keypair(unsigned char *public_key, unsigned char *private_key, const unsigned char *seed);
void ed25519_derive_pub(unsigned char *public_key, const unsigned char *private_key);
void ed25519_sign(unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key, const unsigned char *private_key);
void ed25519_sign_ad(FrameStruct *frame);
int ed25519_verify(const unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key);
int ed25519_verify_ad(const FrameStruct *frame);
void ed25519_add_scalar(unsigned char *public_key, unsigned char *private_key, const unsigned char *scalar);
void ed25519_key_exchange(unsigned char *shared_secret, const unsigned char *public_key, const unsigned char *private_key);
#ifdef __cplusplus

40
User/lib/ed25519/seed.c
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@@ -1,40 +0,0 @@
#include "ed_25519.h"
#ifndef ED25519_NO_SEED
#ifdef _WIN32
#include <windows.h>
#include <wincrypt.h>
#else
#include <stdio.h>
#endif
int ed25519_create_seed(unsigned char *seed) {
#ifdef _WIN32
HCRYPTPROV prov;
if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
return 1;
}
if (!CryptGenRandom(prov, 32, seed)) {
CryptReleaseContext(prov, 0);
return 1;
}
CryptReleaseContext(prov, 0);
#else
FILE *f = fopen("/dev/urandom", "rb");
if (f == NULL) {
return 1;
}
fread(seed, 1, 32, f);
fclose(f);
#endif
return 0;
}
#endif

33
User/lib/ed25519/sign.c
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@@ -1,4 +1,5 @@
#include "ed_25519.h"
#include "lib/config.h"
#include "sha512.h"
#include "ge.h"
#include "sc.h"
@@ -29,3 +30,35 @@ void ed25519_sign(unsigned char *signature, const unsigned char *message, size_t
sc_reduce(hram);
sc_muladd(signature + 32, hram, private_key, r);
}
void ed25519_sign_ad(FrameStruct *frame) {
sha512_context hash;
unsigned char hram[64];
unsigned char r[64];
ge_p3 R;
unsigned char *signature = &(frame->payload[36]);
sha512_init(&hash);
sha512_update(&hash, persistent.privkey + 32, 32);
sha512_update(&hash, frame->payload, 32);
sha512_update(&hash, frame->payload, 36); // pubkey and timestamp combined (32 bytes pubkey, 4 bytes timestamp)
sha512_update(&hash, &(frame->payload[100]), frame->payloadLen - 100);
sha512_final(&hash, r);
sc_reduce(r);
ge_scalarmult_base(&R, r);
ge_p3_tobytes(signature, &R);
sha512_init(&hash);
sha512_update(&hash, signature, 32);
sha512_update(&hash, frame->payload, 32);
sha512_update(&hash, frame->payload, 36); // pubkey and timestamp combined (32 bytes pubkey, 4 bytes timestamp)
sha512_update(&hash, &(frame->payload[100]), frame->payloadLen - 100);
sha512_final(&hash, hram);
sc_reduce(hram);
sc_muladd(signature + 32, hram, persistent.privkey, r);
}

35
User/lib/ed25519/verify.c
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@@ -75,3 +75,38 @@ int ed25519_verify(const unsigned char *signature, const unsigned char *message,
return 1;
}
int ed25519_verify_ad(const FrameStruct *frame) {
unsigned char h[64];
unsigned char checker[32];
sha512_context hash;
ge_p3 A;
ge_p2 R;
const unsigned char *signature = &(frame->payload[36]);
if (signature[63] & 224) {
return 0;
}
if (ge_frombytes_negate_vartime(&A, frame->payload) != 0) { //pubkey is at start
return 0;
}
sha512_init(&hash);
sha512_update(&hash, signature, 32);
sha512_update(&hash, frame->payload, 32);
sha512_update(&hash, frame->payload, 36); // pubkey and timestamp combined (32 bytes pubkey, 4 bytes timestamp)
sha512_update(&hash, &(frame->payload[100]), frame->payloadLen - 100);
sha512_final(&hash, h);
sc_reduce(h);
ge_double_scalarmult_vartime(&R, h, &A, signature + 32);
ge_tobytes(checker, &R);
if (!consttime_equal(checker, signature)) {
return 0;
}
return 1;
}

0
User/lib/telemetry/telemetry.c Normal file
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93
User/lib/telemetry/telemetry.h Normal file
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@@ -0,0 +1,93 @@
#ifndef TELEMETRY_HEADER
#define TELEMETRY_HEADER
#define TELEM_CHANNEL_SELF 1 // LPP data channel for 'self' device
#define LPP_DIGITAL_INPUT 0 // 1 byte
#define LPP_DIGITAL_OUTPUT 1 // 1 byte
#define LPP_ANALOG_INPUT 2 // 2 bytes, 0.01 signed
#define LPP_ANALOG_OUTPUT 3 // 2 bytes, 0.01 signed
#define LPP_GENERIC_SENSOR 100 // 4 bytes, unsigned
#define LPP_LUMINOSITY 101 // 2 bytes, 1 lux unsigned
#define LPP_PRESENCE 102 // 1 byte, bool
#define LPP_TEMPERATURE 103 // 2 bytes, 0.1¡ãC signed
#define LPP_RELATIVE_HUMIDITY 104 // 1 byte, 0.5% unsigned
#define LPP_ACCELEROMETER 113 // 2 bytes per axis, 0.001G
#define LPP_BAROMETRIC_PRESSURE 115 // 2 bytes 0.1hPa unsigned
#define LPP_VOLTAGE 116 // 2 bytes 0.01V unsigned
#define LPP_CURRENT 117 // 2 bytes 0.001A unsigned
#define LPP_FREQUENCY 118 // 4 bytes 1Hz unsigned
#define LPP_PERCENTAGE 120 // 1 byte 1-100% unsigned
#define LPP_ALTITUDE 121 // 2 byte 1m signed
#define LPP_CONCENTRATION 125 // 2 bytes, 1 ppm unsigned
#define LPP_POWER 128 // 2 byte, 1W, unsigned
#define LPP_DISTANCE 130 // 4 byte, 0.001m, unsigned
#define LPP_ENERGY 131 // 4 byte, 0.001kWh, unsigned
#define LPP_DIRECTION 132 // 2 bytes, 1deg, unsigned
#define LPP_UNIXTIME 133 // 4 bytes, unsigned
#define LPP_GYROMETER 134 // 2 bytes per axis, 0.01 ¡ã/s
#define LPP_COLOUR 135 // 1 byte per RGB Color
#define LPP_GPS 136 // 3 byte lon/lat 0.0001 ¡ã, 3 bytes alt 0.01 meter
#define LPP_SWITCH 142 // 1 byte, 0/1
#define LPP_POLYLINE 240 // 1 byte size, 1 byte delta factor, 3 byte lon/lat 0.0001¡ã * factor, n (size-8) bytes deltas
// Only Data Size
#define LPP_DIGITAL_INPUT_SIZE 1
#define LPP_DIGITAL_OUTPUT_SIZE 1
#define LPP_ANALOG_INPUT_SIZE 2
#define LPP_ANALOG_OUTPUT_SIZE 2
#define LPP_GENERIC_SENSOR_SIZE 4
#define LPP_LUMINOSITY_SIZE 2
#define LPP_PRESENCE_SIZE 1
#define LPP_TEMPERATURE_SIZE 2
#define LPP_RELATIVE_HUMIDITY_SIZE 1
#define LPP_ACCELEROMETER_SIZE 6
#define LPP_BAROMETRIC_PRESSURE_SIZE 2
#define LPP_VOLTAGE_SIZE 2
#define LPP_CURRENT_SIZE 2
#define LPP_FREQUENCY_SIZE 4
#define LPP_PERCENTAGE_SIZE 1
#define LPP_ALTITUDE_SIZE 2
#define LPP_POWER_SIZE 2
#define LPP_DISTANCE_SIZE 4
#define LPP_ENERGY_SIZE 4
#define LPP_DIRECTION_SIZE 2
#define LPP_UNIXTIME_SIZE 4
#define LPP_GYROMETER_SIZE 6
#define LPP_GPS_SIZE 9
#define LPP_SWITCH_SIZE 1
#define LPP_CONCENTRATION_SIZE 2
#define LPP_COLOUR_SIZE 3
#define LPP_MIN_POLYLINE_SIZE 8
// Multipliers
#define LPP_DIGITAL_INPUT_MULT 1
#define LPP_DIGITAL_OUTPUT_MULT 1
#define LPP_ANALOG_INPUT_MULT 100
#define LPP_ANALOG_OUTPUT_MULT 100
#define LPP_GENERIC_SENSOR_MULT 1
#define LPP_LUMINOSITY_MULT 1
#define LPP_PRESENCE_MULT 1
#define LPP_TEMPERATURE_MULT 10
#define LPP_RELATIVE_HUMIDITY_MULT 2
#define LPP_ACCELEROMETER_MULT 1000
#define LPP_BAROMETRIC_PRESSURE_MULT 10
#define LPP_VOLTAGE_MULT 100
#define LPP_CURRENT_MULT 1000
#define LPP_FREQUENCY_MULT 1
#define LPP_PERCENTAGE_MULT 1
#define LPP_ALTITUDE_MULT 1
#define LPP_POWER_MULT 1
#define LPP_DISTANCE_MULT 1000
#define LPP_ENERGY_MULT 1000
#define LPP_DIRECTION_MULT 1
#define LPP_UNIXTIME_MULT 1
#define LPP_GYROMETER_MULT 100
#define LPP_GPS_LAT_LON_MULT 10000
#define LPP_GPS_ALT_MULT 100
#define LPP_SWITCH_MULT 1
#define LPP_CONCENTRATION_MULT 1
#define LPP_COLOUR_MULT 1
#endif