DigitalInfinity/ESP32-PaxCounter
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GPS support added (experimental)

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This commit is contained in:
Klaus K Wilting 2018-06-08 22:41:37 +02:00
parent 95be6bc192
commit f7ee3f85b0
11 changed files with 187 additions and 80 deletions
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19
README.md
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@ -159,10 +159,10 @@ Note: all settings are stored in NVRAM and will be reloaded when device starts.
1 = cumulative counter, mac counter is never reset
2 = cyclic confirmed, like 0 but data is resent until confirmation by network received
0x03 (NOT YET IMPLEMENTED) set screen saver mode
0x03 set GPS on/off
0 = screen saver off [default]
1 = screen saver on
0 = GPS off [default]
1 = GPS on, GPS data set (if present) added to payload
0x04 set display on/off
@ -232,7 +232,7 @@ Note: all settings are stored in NVRAM and will be reloaded when device starts.
0x80 get device configuration
device answers with it's current configuration. The configuration is a C structure declared in file [globals.h](src/globals.h#L27-L44) with the following definition:
device answers with it's current configuration. The configuration is a C structure declared in file [globals.h](src/globals.h#L27-L45) with the following definition:
byte 1: Lora SF (7..12)
byte 2: Lora TXpower (2..15)
@ -248,7 +248,8 @@ device answers with it's current configuration. The configuration is a C structu
byte 13: Wifi antenna switch (0=internal, 1=external)
byte 14: Vendorfilter mode (0=disabled, 1=enabled)
byte 15: RGB LED luminosity (0..100 %)
bytes 16-26: Software version (ASCII format, terminating with zero)
byte 16: GPS status (1=on, 0=off)
bytes 17-27: Software version (ASCII format, terminating with zero)
0x81 get device uptime
@ -262,6 +263,14 @@ device answers with it's current configuration. The configuration is a C structu
bytes 1-2: battery voltage in millivolt, 0 if unreadable (little endian format)
0x84 get device GPS status (NOT YET IMPLEMENTED)
bytes 1-4: latitude
bytes 5-8: longitude
byte 9: number of satellites
byte 10: HDOP
bytes 11-12: altidute [meter]
# License
Copyright 2018 Oliver Brandmueller <ob@sysadm.in>

16
platformio.ini
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@ -27,11 +27,12 @@ description = Paxcounter is a proof-of-concept ESP32 device for metering passeng
[common_env_data]
platform_espressif32 = espressif32@>=1.0.2
board_build.partitions = no_ota.csv
board_upload.maximum_size = 2097152
lib_deps_display =
U8g2@>=2.22.14
lib_deps_rgbled =
SmartLeds
SmartLeds@>=1.1.3
lib_deps_gps =
TinyGPSPlus@>=1.0.0
build_flags =
; we need build_flag for logging, otherwise we can't use ESP_LOGx in arduino framework
; ---> NOTE: For production run set DEBUG_LEVEL level to NONE! <---
@ -51,7 +52,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = heltec_wifi_lora_32
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 115200
lib_deps =
@ -65,7 +65,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 115200
lib_deps =
@ -79,7 +78,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =
@ -93,7 +91,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =
@ -107,11 +104,11 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =
${common_env_data.lib_deps_display}
${common_env_data.lib_deps_gps}
build_flags =
${common_env_data.build_flags}
-include "src/hal/ttgobeam.h"
@ -121,7 +118,6 @@ platform = espressif32@1.0.1
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =
@ -135,7 +131,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =
@ -149,7 +144,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = esp32dev
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =
@ -163,7 +157,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = lolin32
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 256000
lib_deps =
@ -177,7 +170,6 @@ platform = ${common_env_data.platform_espressif32}
framework = arduino
board = lolin32
board_build.partitions = ${common_env_data.board_build.partitions}
board_upload.maximum_size = ${common_env_data.board_upload.maximum_size}
monitor_speed = 115200
upload_speed = 921600
lib_deps =

14
src/configmanager.cpp
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@ -22,7 +22,7 @@ void defaultConfig() {
cfg.txpower = 15; // 2-15, lora tx power
cfg.adrmode = 1; // 0=disabled, 1=enabled
cfg.screensaver = 0; // 0=disabled, 1=enabled
cfg.screenon = 1; // 0=disbaled, 1=enabled
cfg.screenon = 1; // 0=disabled, 1=enabled
cfg.countermode = 0; // 0=cyclic, 1=cumulative, 2=cyclic confirmed
cfg.rssilimit = 0; // threshold for rssilimiter, negative value!
cfg.sendcycle = SEND_SECS; // payload send cycle [seconds/2]
@ -32,6 +32,7 @@ void defaultConfig() {
cfg.wifiant = 0; // 0=internal, 1=external (for LoPy/LoPy4)
cfg.vendorfilter = 1; // 0=disabled, 1=enabled
cfg.rgblum = RGBLUMINOSITY; // RGB Led luminosity (0..100%)
cfg.gpsmode = 1; // 0=disabled, 1=enabled
strncpy( cfg.version, PROGVERSION, sizeof(cfg.version)-1 );
}
@ -120,6 +121,9 @@ void saveConfig() {
if( nvs_get_i8(my_handle, "rgblum", &flash8) != ESP_OK || flash8 != cfg.rgblum )
nvs_set_i8(my_handle, "rgblum", cfg.rgblum);
if( nvs_get_i8(my_handle, "gpsmode", &flash8) != ESP_OK || flash8 != cfg.gpsmode )
nvs_set_i8(my_handle, "gpsmode", cfg.gpsmode);
if( nvs_get_i16(my_handle, "rssilimit", &flash16) != ESP_OK || flash16 != cfg.rssilimit )
nvs_set_i16(my_handle, "rssilimit", cfg.rssilimit);
@ -284,6 +288,14 @@ void loadConfig() {
saveConfig();
}
if( nvs_get_i8(my_handle, "gpsmode", &flash8) == ESP_OK ) {
cfg.gpsmode = flash8;
ESP_LOGI(TAG, "GPSmode = %d", flash8);
} else {
ESP_LOGI(TAG, "GPSmode set to default %d", cfg.gpsmode);
saveConfig();
}
nvs_close(my_handle);
ESP_LOGI(TAG, "Done");

28
src/globals.h
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@ -11,6 +11,11 @@
#include <U8x8lib.h>
#endif
//GPS
#ifdef HAS_GPS
#include <TinyGPS++.h>
#endif
// LMIC-Arduino LoRaWAN Stack
#include <lmic.h>
#include <hal/hal.h>
@ -32,7 +37,7 @@ typedef struct {
uint8_t screensaver; // 0=disabled, 1=enabled
uint8_t screenon; // 0=disabled, 1=enabled
uint8_t countermode; // 0=cyclic unconfirmed, 1=cumulative, 2=cyclic confirmed
int16_t rssilimit; // threshold for rssilimiter, negative value!
int16_t rssilimit; // threshold for rssilimiter, negative value!
uint8_t sendcycle; // payload send cycle [seconds/2]
uint8_t wifichancycle; // wifi channel switch cycle [seconds/100]
uint8_t blescantime; // BLE scan cycle duration [seconds]
@ -40,14 +45,29 @@ typedef struct {
uint8_t wifiant; // 0=internal, 1=external (for LoPy/LoPy4)
uint8_t vendorfilter; // 0=disabled, 1=enabled
uint8_t rgblum; // RGB Led luminosity (0..100%)
char version[10]; // Firmware version
uint8_t gpsmode; // 0=disabled, 1=enabled
char version[10]; // Firmware version
} configData_t;
#ifdef HAS_GPS
typedef struct {
uint32_t latitude;
uint32_t longitude;
uint8_t hdop;
uint8_t satellites;
uint16_t altitude;
} gpsStatus_t;
extern gpsStatus_t gps_status; // struct for storing gps data
extern TinyGPSPlus my_gps; // Make TinyGPS++ instance globally availabe
#endif
extern configData_t cfg;
extern uint64_t uptimecounter;
extern osjob_t sendjob;
extern osjob_t sendjob, rcmdjob;
extern char display_lora[], display_lmic[];
extern int countermode, screensaver, adrmode, lorasf, txpower, rlim;
extern uint16_t macs_total, macs_wifi, macs_ble; // MAC counters
extern std::set<uint16_t> macs;
extern hw_timer_t * channelSwitch; // hardware timer used for wifi channel switching
extern hw_timer_t * channelSwitch; // hardware timer used for wifi channel switching
extern xref2u1_t rcmd_data; // buffer for rcommand results size
extern u1_t rcmd_data_size; // buffer for rcommand results size

27
src/gpsread.cpp Normal file
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@ -0,0 +1,27 @@
#ifdef HAS_GPS
#include "globals.h"
// Local logging tag
static const char TAG[] = "main";
// GPS Read FreeRTos Task
void gps_loop(void * pvParameters) {
configASSERT( ( ( uint32_t ) pvParameters ) == 1 ); // FreeRTOS check
HardwareSerial GPS_Serial(1);
//GPS_Serial.begin(9600, SERIAL_8N1, 12, 15);
GPS_Serial.begin(HAS_GPS);
while(1) {
while (GPS_Serial.available()) {
my_gps.encode(GPS_Serial.read());
}
vTaskDelay(1/portTICK_PERIOD_MS); // reset watchdog
}
}
#endif // HAS_GPS

5
src/hal/ttgobeam.h
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@ -3,11 +3,10 @@
#define CFG_sx1276_radio 1 // HPD13A LoRa SoC
#define HAS_LED 21 // on board green LED_G1
#define HAS_BUTTON GPIO_NUM_39 // button on board next to battery indicator LED (other one is reset)
#define HAS_BUTTON GPIO_NUM_0 // on board button "BOOT" (next to reset button)
#define HAS_BATTERY_PROBE ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7
#define BATT_FACTOR 2 // voltage divider 100k/100k on board
// #define HAS_GPS // to be done
// GSP serial (9600, SERIAL_8N1, 12, 15); //17-TX 18-RX
#define HAS_GPS 9600, SERIAL_8N1, 12, 15 //17-TX 18-RX
// re-define pin definitions of pins_arduino.h
#define PIN_SPI_SS 18 // ESP32 GPIO18 (Pin18) -- HPD13A NSS/SEL (Pin4) SPI Chip Select Input

23
src/lorawan.cpp
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@ -109,7 +109,7 @@ void do_send(osjob_t* j){
// Check if there is a pending TX/RX job running
if (LMIC.opmode & OP_TXRXPEND) {
ESP_LOGI(TAG, "OP_TXRXPEND, not sending");
ESP_LOGI(TAG, "LoRa busy, rescheduling");
sprintf(display_lmic, "LORA BUSY");
goto end;
}
@ -129,11 +129,25 @@ void do_send(osjob_t* j){
mydata[3] = 0;
}
// Prepare upstream data transmission at the next possible time.
LMIC_setTxData2(1, mydata, sizeof(mydata), (cfg.countermode & 0x02));
ESP_LOGI(TAG, "Packet queued");
LMIC_setTxData2(COUNTERPORT, mydata, sizeof(mydata), (cfg.countermode & 0x02));
ESP_LOGI(TAG, "%d bytes queued to send", sizeof(mydata));
sprintf(display_lmic, "PACKET QUEUED");
#ifdef HAS_GPS
if (cfg.gpsmode && my_gps.location.isValid()) {
gps_status.latitude = my_gps.location.lat();
gps_status.longitude = my_gps.location.lng();
gps_status.satellites = my_gps.satellites.value();
gps_status.hdop = my_gps.hdop.value();
gps_status.altitude = my_gps.altitude.meters();
LMIC_setTxData2(GPSPORT, (byte*)&gps_status, sizeof(gps_status), (cfg.countermode & 0x02));
ESP_LOGI(TAG, "HDOP=%d, SATS=%d, LAT=%d, LON=%d", gps_status.hdop, gps_status.satellites, gps_status.latitude, gps_status.longitude );
}
#endif
// clear counter if not in cumulative counter mode
if (cfg.countermode != 1) {
reset_counters(); // clear macs container and reset all counters
@ -200,8 +214,9 @@ void onEvent (ev_t ev) {
unsigned char* buffer = new unsigned char[MAX_LEN_FRAME];
memcpy(buffer, LMIC.frame, MAX_LEN_FRAME); //Copy data from cfg to char*
int i, k = LMIC.dataBeg, l = LMIC.dataBeg+LMIC.dataLen-2;
for (i=k; i<=l; i+=2)
for (i=k; i<=l; i+=2) {
rcommand(buffer[i], buffer[i+1]);
}
delete[] buffer; //free memory
}
}

50
src/main.cpp
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@ -39,7 +39,7 @@ Refer to LICENSE.txt file in repository for more details.
// Initialize global variables
configData_t cfg; // struct holds current device configuration
osjob_t sendjob; // LMIC job handler
osjob_t sendjob, rcmdjob; // LMIC job handler
uint64_t uptimecounter = 0; // timer global for uptime counter
uint8_t DisplayState = 0; // globals for state machine
uint16_t macs_total = 0, macs_wifi = 0, macs_ble = 0; // MAC counters globals for display
@ -52,6 +52,13 @@ uint16_t LEDBlinkDuration = 0; // How long the blink need to be
uint16_t LEDColor = COLOR_NONE; // state machine variable to set RGB LED color
hw_timer_t * displaytimer = NULL; // configure hardware timer used for cyclic display refresh
hw_timer_t * channelSwitch = NULL; // configure hardware timer used for wifi channel switching
xref2u1_t rcmd_data; // buffer for rcommand results size
u1_t rcmd_data_size; // buffer for rcommand results size
#ifdef HAS_GPS
gpsStatus_t gps_status; // struct for storing gps data
TinyGPSPlus my_gps; // create TinyGPS++ instance
#endif
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED; // sync main loop and ISR when modifying shared variable DisplayIRQ
@ -130,37 +137,14 @@ void lorawan_loop(void * pvParameters) {
configASSERT( ( ( uint32_t ) pvParameters ) == 1 ); // FreeRTOS check
//static uint16_t lorawait = 0;
while(1) {
// execute LMIC jobs
os_runloop_once();
/*
// check if payload is sent
while(LMIC.opmode & OP_TXRXPEND) {
if(!lorawait)
sprintf(display_lora, "LoRa wait");
lorawait++;
// in case sending really fails: reset LMIC and rejoin network
if( (lorawait % MAXLORARETRY ) == 0) {
ESP_LOGI(TAG, "Payload not sent, resetting LMIC and rejoin");
lorawait = 0;
LMIC_reset(); // Reset the MAC state. Session and pending data transfers will be discarded.
};
vTaskDelay(1000/portTICK_PERIOD_MS);
}
*/
vTaskDelay(1/portTICK_PERIOD_MS); // reset watchdog
os_runloop_once(); // execute LMIC jobs
vTaskDelay(1/portTICK_PERIOD_MS); // reset watchdog
}
}
/* end LMIC specific parts --------------------------------------------------------------- */
/* beginn hardware specific parts -------------------------------------------------------- */
#ifdef HAS_DISPLAY
@ -498,7 +482,6 @@ void setup() {
delay(1000);
#endif
// initialize button handling if needed
#ifdef HAS_BUTTON
strcat(features, " BTN_");
@ -521,6 +504,11 @@ void setup() {
antenna_init();
#endif
// initialize gps if present
#ifdef HAS_GPS
strcat(features, " GPS");
#endif
#ifdef HAS_DISPLAY
strcat(features, " OLED");
// initialize display
@ -589,6 +577,14 @@ xTaskCreatePinnedToCore(sniffer_loop, "wifisniffer", 2048, ( void * ) 1, 1, NULL
}
#endif
// if device has GPS and GPS function is enabled, start GPS reader task on core 0
#ifdef HAS_GPS
if (cfg.gpsmode) {
ESP_LOGI(TAG, "Starting GPS task on core 0");
xTaskCreatePinnedToCore(gps_loop, "gpsreader", 2048, ( void * ) 1, 1, NULL, 0);
}
#endif
// kickoff sendjob -> joins network and rescedules sendjob for cyclic transmitting payload
do_send(&sendjob);

11
src/main.h
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@ -1,6 +1,6 @@
// program version - note: increment version after modifications to configData_t struct!!
#define PROGVERSION "1.3.71" // use max 10 chars here!
#define PROGVERSION "1.3.8" // use max 10 chars here!
#define PROGNAME "PAXCNT"
//--- Declarations ---
@ -42,6 +42,11 @@ void wifi_sniffer_packet_handler(void *buff, wifi_promiscuous_pkt_type_t type);
// defined in blescan.cpp
#ifdef BLECOUNTER
void start_BLEscan(void);
void stop_BLEscan(void);
void start_BLEscan(void);
void stop_BLEscan(void);
#endif
//defined in gpsread.cpp
#ifdef HAS_GPS
void gps_loop(void * pvParameters);
#endif

3
src/paxcounter.conf
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@ -37,11 +37,14 @@
// LoRa payload send cycle --> take care of duty cycle of LoRaWAN network! <--
#define SEND_SECS 120 // [seconds/2] -> 240 sec.
#define MEM_LOW 2048 // [Bytes] low memory threshold triggering a send cycle
#define RETRANSMIT_RCMD 5 // [seconds] wait time before retransmitting rcommand results
// Default LoRa Spreadfactor
#define LORASFDEFAULT 9 // 7 ... 12 SF, according to LoRaWAN specs
#define MAXLORARETRY 500 // maximum count of TX retries if LoRa busy
#define RCMDPORT 2 // LoRaWAN Port on which device listenes for remote commands
#define GPSPORT 3 // LoRaWAN Port on which device sends gps data
#define COUNTERPORT 1 // LoRaWAN Port on which device sends counts
// Default RGB LED luminosity (in %)
#define RGBLUMINOSITY 30 // 30%

65
src/rcommand.cpp
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@ -29,6 +29,25 @@ typedef struct {
uint32_t read_voltage(void);
#endif
// function sends result of get commands to LoRaWAN network
void do_transmit(osjob_t* j){
// check if there is a pending TX/RX job running, if yes then reschedule transmission
if (LMIC.opmode & OP_TXRXPEND) {
ESP_LOGI(TAG, "LoRa busy, rescheduling");
sprintf(display_lmic, "LORA BUSY");
os_setTimedCallback(&rcmdjob, os_getTime()+sec2osticks(RETRANSMIT_RCMD), do_transmit);
}
LMIC_setTxData2(RCMDPORT, rcmd_data, rcmd_data_size, 0); // send data unconfirmed on RCMD Port
ESP_LOGI(TAG, "%d bytes queued to send", rcmd_data_size);
sprintf(display_lmic, "PACKET QUEUED");
}
// help function to transmit result of get commands, since callback function do_transmit() cannot have params
void transmit(xref2u1_t mydata, u1_t mydata_size){
rcmd_data = mydata;
rcmd_data_size = mydata_size;
do_transmit(&rcmdjob);
}
// help function to assign LoRa datarates to numeric spreadfactor values
void switch_lora (uint8_t sf, uint8_t tx) {
@ -141,6 +160,14 @@ void set_display(uint8_t val) {
}
};
void set_gps(uint8_t val) {
ESP_LOGI(TAG, "Remote command: set GPS to %s", val ? "on" : "off");
switch (val) {
case 1: cfg.gpsmode = val; break;
default: cfg.gpsmode = 0; break;
}
};
void set_lorasf(uint8_t val) {
ESP_LOGI(TAG, "Remote command: set LoRa SF to %d", val);
switch_lora(val, cfg.txpower);
@ -204,30 +231,20 @@ void set_lorapower(uint8_t val) {
switch_lora(cfg.lorasf, val);
};
void set_noop (uint8_t val) {
ESP_LOGI(TAG, "Remote command: noop - doing nothing");
};
void get_config (uint8_t val) {
ESP_LOGI(TAG, "Remote command: get configuration");
int size = sizeof(configData_t);
LMIC_setTxData2(RCMDPORT, (byte*)&cfg, size, 0); // send data unconfirmed on RCMD Port
ESP_LOGI(TAG, "%d bytes queued in send queue", size);
transmit((byte*)&cfg, sizeof(cfg));
};
void get_uptime (uint8_t val) {
ESP_LOGI(TAG, "Remote command: get uptime");
int size = sizeof(uptimecounter);
LMIC_setTxData2(RCMDPORT, (byte*)&uptimecounter, size, 0); // send data unconfirmed on RCMD Port
ESP_LOGI(TAG, "%d bytes queued in send queue", size);
transmit((byte*)&uptimecounter, sizeof(uptimecounter));
};
void get_cputemp (uint8_t val) {
ESP_LOGI(TAG, "Remote command: get cpu temperature");
float temp = temperatureRead();
int size = sizeof(temp);
LMIC_setTxData2(RCMDPORT, (byte*)&temp, size, 0); // send data unconfirmed on RCMD Port
ESP_LOGI(TAG, "%d bytes queued in send queue", size);
transmit((byte*)&temp, sizeof(temp));
};
void get_voltage (uint8_t val) {
@ -237,9 +254,20 @@ void get_voltage (uint8_t val) {
#else
uint16_t voltage = 0;
#endif
int size = sizeof(voltage);
LMIC_setTxData2(RCMDPORT, (byte*)&voltage, size, 0); // send data unconfirmed on RCMD Port
ESP_LOGI(TAG, "%d bytes queued in send queue", size);
transmit((byte*)&voltage, sizeof(voltage));
};
void get_gps (uint8_t val) {
ESP_LOGI(TAG, "Remote command: get gps status");
#ifdef HAS_GPS
gps_status.latitude = my_gps.location.lat();
gps_status.longitude = my_gps.location.lng();
gps_status.satellites = my_gps.satellites.value();
gps_status.hdop = my_gps.hdop.value();
gps_status.altitude = my_gps.altitude.meters();
transmit((byte*)&gps_status, sizeof(gps_status));
ESP_LOGI(TAG, "HDOP=%d, SATS=%d, LAT=%d, LON=%d", gps_status.hdop, gps_status.satellites, gps_status.latitude, gps_status.longitude );
#endif
};
@ -249,7 +277,7 @@ void get_voltage (uint8_t val) {
cmd_t table[] = {
{0x01, set_rssi, true},
{0x02, set_countmode, true},
{0x03, set_noop, false},
{0x03, set_gps, true},
{0x04, set_display, true},
{0x05, set_lorasf, true},
{0x06, set_lorapower, true},
@ -266,7 +294,8 @@ cmd_t table[] = {
{0x80, get_config, false},
{0x81, get_uptime, false},
{0x82, get_cputemp, false},
{0x83, get_voltage, false}
{0x83, get_voltage, false},
{0x84, get_gps, false}
};
// check and execute remote command