Setting neopixel color with function

Troubleshooting
1

I’m using ws2812fx for the pixel strip…

This is how I setting the color:
ws2812fx.setColor(flashColor);

Here is my function code:

int setColor(String command)
    {
        unsigned long cmd = strtol(command, NULL, 64);
        if(cmd >= 0 && cmd <= 0xffffff)
            {
                flashColor = cmd;
            }
        return flashColor;
    }

I can get blues and greens but if I put values for red they aren’t taking, i.e. “ff0000” should be RED

2

Cleaned things up a bit, but it didn't help...

int flashColor = 0xff6700;

Particle.function("lightColorHex", setColor);

int setColor(String command)
    {
        int cmd = (int)strtol(command, NULL, 32);
        if(cmd >= 0 && cmd <= 0xffffff)
            {
                flashColor = cmd;
            }
        return flashColor;
    }
3

I misunderstood the syntax of strtol the last parameter isn’t bits, it’s the base

Changed my code to this…

int cmd = (int)strtoll(command, NULL, 0);

…and now it works, but I do have to put the values in with “0x” at the front which is fine “0xff00ff” now shows up as violet

4

As you found out strtol() takes the base, so when you know you will pass HEX numbers you can set the base as 16 - this way you should not need the 0x