Sonoff dual r2 + DALLAS in GPIO9 Failed getting lock

[reydecopas]

Hi,
I am trying to add a dallas sensor to a sonoff dual r2, after compiling with -DDALLAS_PIN=9 -DDALLAS_SUPPORT=1 -DSENSOR_SUPPORT=1
and modifying hardware.h to
//#define BUTTON2_PIN 9 // Button 1 on header
#define BUTTON2_PIN GPIO_NONE // Button 1 on header

I am getting in the console:
[294200] [SENSOR] Initializing Dallas @ GPIO9
[294201] [GPIO] Failed getting lock for GPIO9
[294201] [SENSOR] -> ERROR 7

What am I doing wrong?

With tasmota I can read temperature in GPIO9

[mcspr]

Firmware tracks Dallas GPIO usage via some helper methods here:

espurna/code/espurna/gpio.ino

Lines 17 to 28 in e17ee61

	bool gpioGetLock(unsigned char gpio) {
	if (gpioValid(gpio)) {
	unsigned int mask = 1 << gpio;
	if ((_gpio_locked & mask) == 0) {
	_gpio_locked |= mask;
	DEBUG_MSG_P(PSTR("[GPIO] GPIO%u locked\n"), gpio);
	return true;
	}
	}
	DEBUG_MSG_P(PSTR("[GPIO] Failed getting lock for GPIO%u\n"), gpio);
	return false;
	}

But it does not even get to the locking part, because GPIO number is less than 12:

espurna/code/espurna/gpio.ino

Lines 12 to 13 in e17ee61

	if (gpio <= 5) return true;
	if (12 <= gpio && gpio <= 15) return true;

Adjusting 12 to 9 will fix the specific issue, because 8285 does not have GPIO9 connected to the SPI

[reydecopas]

perfect!!! thank you!! it works!!!