BME280 Not working on v2.1.1

[RodWatt]

Hi,

I have recently updated to V2.1.1 and I can no longer get my BME280 sensor to work.

I am using the standard code from the samples  directory, 

#include <zephyr/zephyr.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <zephyr/drivers/sensor.h>
#include <stdio.h>

/*
 * Get a device structure from a devicetree node with compatible
 * "bosch,bme280". (If there are multiple, just pick one.)
 */

static const struct device *get_bme280_device(void)
{
	const struct device *dev = DEVICE_DT_GET_ANY(bosch_bme280);

	if (dev == NULL) {
		/* No such node, or the node does not have status "okay". */
		printk("\nError: no device found.\n");
		return NULL;
	}

	if (!device_is_ready(dev)) {
		printk("\nError: Device \"%s\" is not ready; "
		       "check the driver initialization logs for errors.\n",
		       dev->name);
		return NULL;
	}

	printk("Found device \"%s\", getting sensor data\n", dev->name);
	return dev;
}

void main(void)
{
	const struct device *dev = get_bme280_device();

	if (dev == NULL) {
		return;
	}

	while (1) {
		struct sensor_value temp, press, humidity;

		sensor_sample_fetch(dev);
		sensor_channel_get(dev, SENSOR_CHAN_AMBIENT_TEMP, &temp);
		sensor_channel_get(dev, SENSOR_CHAN_PRESS, &press);
		sensor_channel_get(dev, SENSOR_CHAN_HUMIDITY, &humidity);

		printk("temp: %d.%06d; press: %d.%06d; humidity: %d.%06d\n",
		      temp.val1, temp.val2, press.val1, press.val2,
		      humidity.val1, humidity.val2);

		k_sleep(K_MSEC(1000));
	}
}

 

my overlay file is this

&pinctrl {
	uart0_default_alt: uart0_default_alt {
		group0 {
			psels = <NRF_PSEL(UART_TX, 0, 24)>, <NRF_PSEL(UART_RX, 0, 22)>;
		};
	};

	uart0_sleep_alt: uart0_sleep_alt {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 24)>, <NRF_PSEL(UART_RX, 0, 22)>;
			low-power-enable;
		};
	};
	i2c0_default_alt: i2c0_default_alt {
		group2 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 17)>, <NRF_PSEL(TWIM_SCL, 0, 20)>;
		};
	};

	i2c0_default_sleep: i2c0_default_sleep {
		group3 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 17)>, <NRF_PSEL(TWIM_SCL, 0, 20)>;
			low-power-enable;
		};
	};
};

&uart0 {
	pinctrl-0 = <&uart0_default_alt>;
	pinctrl-1 = <&uart0_sleep_alt>;	
	pinctrl-names = "default", "sleep";

	compatible = "nordic,nrf-uart";
	current-speed = <115200>;
	status = "okay";
};

&i2c0 {
	status = "okay";
	compatible = "nordic,nrf-twim";
	pinctrl-0 = <&i2c0_default_alt>;
	pinctrl-1 = <&i2c0_default_sleep>;
	pinctrl-names = "default", "sleep";
	clock-frequency = < I2C_BITRATE_STANDARD >;
	bme280@76 {
		compatible = "bosch,bme280";
		reg = <0x76>;
		label = "BME280";
	};
};

my prj file looks like this

CONFIG_PINCTRL=y
CONFIG_ASSERT=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_GPIO=y
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_NEWLIB_LIBC=y
CONFIG_CONSOLE_SUBSYS=y
CONFIG_CONSOLE_GETCHAR=y
CONFIG_STDOUT_CONSOLE=y
CONFIG_CONSOLE=y

CONFIG_CPLUSPLUS=y
CONFIG_LOG=y
CONFIG_SHELL=y
CONFIG_REBOOT=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_PRINTK=y
CONFIG_PM_DEVICE=y

CONFIG_I2C=y
CONFIG_I2C_NRFX=y
CONFIG_SENSOR=y
CONFIG_BME280=y
CONFIG_BOOT_BANNER=n

CONFIG_HEAP_MEM_POOL_SIZE=16384

 I am using VS and the line "CONFIG_BME280=y" shows a warning

CONFIG_BME280 was assigned the value y, but got the value n. Missing dependencies:
DT_HAS_BOSCH_BME280_ENABLED

What am I missing?

Rod

[Vidar Berg]

Hello,

The error indicates that the BM280 is not enabled in your DT. Please add the "status = "okay";  line to your overlay as shown here: https://github.com/nrfconnect/sdk-zephyr/blob/d9f99ed1951a973c691cd5d6bd70aecb597b2030/boards/arm/bl654_sensor_board/bl654_sensor_board.dts#L87

Best regards,

Vidar

[RodWatt]

Hi Vidar,

Thanks for the suggestion. I have updated my overlay file as suggested but still seeing the same error.

Rod

[Vidar Berg]

Hi Rod,

OK, this is a good step in the right direction. I have only been focusing on the "CONFIG_DT_HAS_BOSCH_BME280_ENABLED not defined" warning until now. The 2nd error which you are seeing now is a runtime error and comes from the driver here: https://github.com/nrfconnect/sdk-zephyr/blob/main/drivers/i2c/i2c_nrfx_twim.c#L171, and it occurs during initialisation of the driver on startup.

It sounds like you were able to interface with the sensor before you updated to SDK v2.1.1. What version did you use previously? Also, is there anything else that have changed? Pin assignments, etc?

The best way to troubleshoot this further may be to use a logic analyzer and probe the bus lines, if you have one available.

Vidar

[RodWatt]

Hi Vidar,

Sorry, I was mistaken, the "CONFIG_DT_HAS_BOSCH_BME280_ENABLED not defined" is still there.

I cant recall when this stopped working, I know it worked before the changes to the overlay file.

 Errors when using BME680 Sample Code 

Since then, the board hasn't changed, the pinout hasn't changed, 

Rod

[Vidar Berg]

Hi Rod,

I notice you are setting the i2c address to 0x77 in the overlay you posted here:  RE: Errors when using BME680 Sample Code and 0x76 in the one you posted here. Could this be the reason? I guess you could also try to use the TWI instead of the TWIM peripheral by changing "compatible" from "compatible = "nordic,nrf-twim"; to compatible = "nordic,nrf-twi";

Best regards,

Vidar

[RodWatt]

Hi Vidar,

Sorry, maybe that was a bad example. The '680 is 0x77, the '280 is 0x76.I have tried both. I have also tried both twi and twin.

Rod 

[RodWatt]

Hi Vidar,

I got it working! I think the change was to move to using I2c1. I also actively disabled some other peripherals. For completeness, I have shared my overlay file below. I am using the standard code from the samples.

Rod

&pinctrl {
	uart0_default_alt: uart0_default_alt {
		group0 {
			psels = <NRF_PSEL(UART_TX, 0, 24)>, <NRF_PSEL(UART_RX, 0, 22)>;
		};
	};

	uart0_sleep_alt: uart0_sleep_alt {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 24)>, <NRF_PSEL(UART_RX, 0, 22)>;
			low-power-enable;
		};
	};


	i2c1_default_alt: i2c1_default_alt {
		group2 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 17)>, <NRF_PSEL(TWIM_SCL, 0, 20)>;
		};
		
	};

	i2c1_sleep_alt: i2c1_sleep_alt {
		group3 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 17)>, <NRF_PSEL(TWIM_SCL, 0, 20)>;
			low-power-enable;
		};
		
	};
};

&uart0 {
	pinctrl-0 = <&uart0_default_alt>;
	pinctrl-1 = <&uart0_sleep_alt>;	
	pinctrl-names = "default", "sleep";
	compatible = "nordic,nrf-uart";
	current-speed = <115200>;
	status = "okay";
};

&i2c1 {
	status = "okay";
	compatible = "nordic,nrf-twim";
	pinctrl-0 = <&i2c1_default_alt>;
	pinctrl-1 = <&i2c1_sleep_alt>;
	pinctrl-names = "default", "sleep";
	clock-frequency = <I2C_BITRATE_STANDARD>;
	bme280@76 {
		compatible = "bosch,bme280";
		reg = <0x76>;
		label = "BME280";
		status = "okay";
	};
};

&i2c0 {
	status = "disabled";
 };

 &spi0 {
	status = "disabled";
 };

&spi1 {
	status = "disabled";
 };

 &gpio0 {
	status = "disabled";
 };

 &gpio1 {
	status = "disabled";
 };

 &usbd {
	status = "disabled";
 };

[Vidar Berg]

Hi Rod,

Thank your for the update, I'm glad to hear that it finally works now! Although, it would have been nice to understand why i2c0 did not work.

The build should have triggered an error at compile if another peripheral  with a shared ID such as spi0 had been enabled. The peripheral also seems to get initialized correctly when I run it here. I will make sure to update this ticket if I figure out what may have caused this.

Vidar

[RodWatt]

Hi Vidar,

Yes, I am also not 100% convinced that this was the actual fix, it could be a coincidence. Previously, I had used !2C0. I will put it back to I2C0 and see if it still works.

Since posting my "fix", i have tried to get the BME680 sensor to work and the CFB display, both peripherals I have previously had working, also fail with !2C errors. I think there is someone more fundamental  going on here.    

Can you open this ticket up again?

Rod

[Vidar Berg]

Hi Rod,

The ticket is open now, so we can continue here.

Are you able to check the TWIM0/1 registers like shown in my previous comment to see if there are any differences when you change from instance 1 to 0?

It is also worth checking if the GPIO configuration for the SDA and SCL pin matches this : Master mode pin configuration.  

Vidar

Edit: In case you don't have external pull-ups on the SDA/SCL lines, please add the 'bias-pull-up' property to your overlay (ref. https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/build/dts/api/bindings/pinctrl/nordic,nrf-pinctrl.html#grandchild-node-properties)

&pinctrl {

	i2c0_default_alt: i2c0_default_alt {
		group2 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 17)>, <NRF_PSEL(TWIM_SCL, 0, 20)>;
			bias-pull-up;
		};
	};

	i2c0_default_sleep: i2c0_default_sleep {
		group3 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 17)>, <NRF_PSEL(TWIM_SCL, 0, 20)>;
			low-power-enable;
		};
	};
};

Also, I don't think I have asked you earlier, but what board do you build for, is it the '52840dk_nrf52840'?

[RodWatt]

Hi Vidar,

I will check the registers later when i get a chance. I do have external pull ups, this is a board that has been working previously. My board is a nrf52840dongle_nrf52840.

Rod

[RodWatt]

Hi Vidar,

I have moved back to I2C0 and its all working fine. I still cannot get my BME680 sensor to work but I have got both the BME280 and my CFD display, which are both on the !2C0 bus working so am starting to think the '680 could be damaged. So, I am still at a loss to explain what the initial problem was. I am very methodical now about deleting my build directory after major changes. Maybe previously I was picking up some stale settings?

I am using Visual Studio, I assume I can update the build commands so I can force a pristine build every time.

Rod