@tamer_ae
This is the direct link
https://github.com/ds-dyad/10n2-app/blob/master/sdk.config

This is not my project, so I cannot give details.

I do not know if the speed plays an important role here. I added it to my code. (I interface LSM303)

Wire.setClock(400000); // 400KHz

On the first glance the code looks good.

I would try out one of the Arduino libraries like this https://github.com/adafruit/Adafruit_MPU6050. Just the given example to check if the hardware connections are good before writing own code.

@gyps
Also try to increase the upload speed.
There is a configuration ${config:spresense.serial.port}. I have no clue how to set it.
The alternative is hack it into the file spresense-sdk/spresense/sdk/tools/flash.sh

UART_BAUDRATE="230400"

Higher speeds are not successful.

Also do not forget the clean "make clean -j".

@CamilaSouza
Hi Camila, I still hope to get an answer for the previous question.

The mics are connected on the mic pins of the extension board (followed the instruction here: https://developer.sony.com/develop/spresense/tutorials-sample-projects/spresense-tutorials/using-multiple-microphone-inputs-with-spresense)

The earphone is connected to the headphone connector on the extension board (for audio output).

Since this project is for SNR measurement, I use the audio recorder mode. My question is: Can I generate an audio beep to earphone through headphone connector as an alarm? I do not know how to combine the audio recorder mode and the audio player mode together.

Thank you in advance for any help,

Best,

Larry

@dshilov-1-1 Thank you for your reply.
I only have the extension board. I thought that was a different sensing add-on as the accelerometer included in the EVK-701 is not BMI160.

I do have another IMU which I tried to use but I keep getting the failed to connect to I2c error. is there a way to check if the hardware is fine or not?
Many thanks!

Hi, @jens6151-0-1-1

Thank you for your feedback!
I'll share your feedback internally and investigate if there is a reason why it is done this way.

Hi @jens6151-0-1-1

Let me investigate this questions internally and get back to you as soon as possible.

@jp04 No I do not know the precission of the GNSS. I did not measure it.
So we need to believe the documentation. See

GNSS Performance GNSS Performance

If you can use QZSS-L1S then it says <2m 95% accuracy in Japan. Otherwise <7.8m in the city.

If I ever should do any measurements with I can post them. However sorry, there is currently no plan to do so.

Hi @jens6151-0-1-1

We have reproduced the issue, and it will be fixed in next SDK release 🙂

Thank you for your support in finding this issues so we can improve our SDK.

@CamilaSouza I have built the camera program since then, but only when enabling multi_webcam from the Kconfig file or from the OS settings, it does not work and I often get the aforementioned error.
Also If I do the following, I can enable it successfully without any problem.

. /tools/config.py examples/multiwebcam

@nimish

I see your point.
We are always trying to improve our documentation and all feedback is valuable.
I'll share your feedback with the responsible parties.

The answer is at https://forum.developer.sony.com/topic/798/wifi-add-board-connection-problem/22

@UoGTFranklin-0-1-1-1 You can define the SS pin before including the SdFat library. You can define the SS pin as a constant, for example:

const uint8_t SS = 46;

The SS pin number to the chip select pin of the SD card on the Spresence board is pin 46.

@eatbas
Although I have a different microphone (link). I experienced very low input. It was better after setting the gain to max. Can you try?

theRecorder->setMicGain(210);

Otherwise please double check the instructions
https://developer.sony.com/develop/spresense/docs/hw_docs_lte_en.html#_microphone_usage

For analog MEMS microphones the bias pins on JP10 provide power to the MEMS microphone, connect the bias pin of JP10 to the MEMS microphones power supply pin.

@NavaneethRao-2
I'm glad 🙂

@maxieaussie-0 would it be possible for you to try the recovery tool with an unmodified Spresense board?
That way we can check if the tool is working on the regular board.
Because in your case it's probably caused by the flash memory update.

@jens6151-0-1-1 Thanks for your suggestion, It worked with that program.

@CamilaSouza Thank you very much for your kind answer.
Your answers are helpful to understand.