Tracker One "CAN 5V" wire on the M8 connector

I am trying to figure out the simplest way to turn on/off the “CAN 5V” wire on the M8 connector on the Tracker One.

I saw that that it may be able to be called with CAN_PWR.

Triggering through the console would be fine for my initial prototyping.

Anyone know a good solution?

You can’t do it from the console with the default tracker edge firmware. However, from your own firmware you can turn it on using:

digitalWrite(CAN_PWR, HIGH);

and turn it off with

digitalWrite(CAN_PWR, LOW);

You could do that from a Particle.function or a Particle edge command handler to do it remotely from the console if you needed to be able to do that with your firmware.

I am getting an out of scope error, not sure where I am going wrong.

Code below

#include "Particle.h"

#include "tracker_config.h"
#include "tracker.h"



SerialLogHandler logHandler(115200, LOG_LEVEL_TRACE, {
    { "app.gps.nmea", LOG_LEVEL_INFO },
    { "app.gps.ubx",  LOG_LEVEL_INFO },
    { "", LOG_LEVEL_INFO },
    { "net.ppp.client", LOG_LEVEL_INFO },

void setup()
    Particle.function("Relay", RelayControl);
    pinMode(CAN_PWR, OUTPUT);
    digitalWrite(CAN_PWR, LOW);

void loop()

int RelayControl(String command)
   int state = LOW;

   // find out the state of the relay
   if(command == "HIGH"){
	   state = HIGH;
   }else if(command == "LOW"){ 
	   state = LOW;
	   return -1;

   // write to the appropriate pin
   digitalWrite(CAN_PWR, state);
   return 1;

Could you copy and paste the actual error?

c:/Users/XXX/tracker-edge//src/main.cpp: In function 'void setup()':
c:/Users/XXX/tracker-edge//src/main.cpp:39:32: error: 'RelayControl' was not declared in this scope
   39 |     Particle.function("Relay", RelayControl);
      |                                ^~~~~~~~~~~~
make[3]: *** [../build/ ../build/target/user/platform-26-m/tracker-edge/src/main.o] Error 1
make[2]: *** [../../../build/ user] Error 2
make[1]: *** [../build/ modules/tracker/user-part] Error 2
make: *** [C:\Users\XXX\.particle\toolchains\buildscripts\1.9.2\Makefile:54: compile-user] Error 2
The terminal process "C:\Users\XXX\.particle\toolchains\buildtools\1.1.1\bin\bash.exe '-c', 'make -f 'C:\Users\XXX\.particle\toolchains\buildscripts\1.9.2\Makefile' compile-user -s'" terminated with exit code: 2.

Just add a function prototype before setup().

Normally that would be a C/C++ requirement anyway.
It’s only not required for the primary .ino file in a project as this undergoes some pre-processing which - among other things - adds any missing prototypes.
But for .cpp files it is/was always needed.

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