@CamilaSouza Thanks a lot.

@gyps Thank you very much, it works !

Hi, @maxieaussie-0
I already replied in the other post, but I'll just replicate the answer here for reference.

Physically upgrading the Flash will not work because Secure CPU defined fixed size of partitions, for SPK area and User area.
So even if you re-worked SPI Flash, it is the same size on software side.

Hello, @Beckmx

Currently the code for the License Plate Recognition example is not ready to be published.
This situation might change in the future, but on the meantime I encourage you to look at the projects published on the Spresense Developer Challenge 2022
https://www.hackster.io/contests/Spresense2022

There are a lot of interesting examples to draw inspiration from 🙂

@Noor and @jp04

You two are using two different WiFi board options, but you are dealing with the same issue of how to upload the certificates related to SSL connections by using AT command.

I thought you might benefit from getting in touch.

Hey, @Ajit01

In the past when I got random results from analog signals I had forgotten to connect the sensor GND with Spresense GND. Please check this.

But to make sure that everything is good with the spresense analog in, you can test connecting the 3.3V pin to A0 and then the 5V pin to A0 and printing the value.

Doing this here I got 658 with 3.3V and 986 with 5V.

Code I used to test mine:

int sensorPin = A0; // select the input pin for the potentiometer int sensorValue = 0; // variable to store the value coming from the sensor void setup() { Serial.begin(9600); } void loop() { // read the value from the sensor: sensorValue = analogRead(sensorPin); Serial.println(sensorValue); delay(1000); }

Hello, @Sean-Phillips!

Good to see that you're enjoying your Spresense learning process 🙂

About the interrupts, there are some resources that might help you!
In https://developer.sony.com/develop/spresense/docs/arduino_developer_guide_en.html#_functional_differences, check out the section on Interrupts. It has a lot of important information.

Also, check out the Arduino example that's under "Low Power -> External Wake Up"
https://github.com/sonydevworld/spresense-arduino-compatible/blob/master/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/LowPower/examples/ExternalWakeup/ExternalWakeup.ino

To choose the pins from the Extension board, you only need to change the pin number for a pin in the extension board. If you're unsure about the pin numbers of the extension board, check out the extension board section in our introduction https://developer.sony.com/develop/spresense/docs/introduction_en.html#_extension_board.

Let me know if the material makes sense to you or if I can help you with anything else.

Have fun!

Hi, @nimish

It should be possible.
You would need to implement the USB device class driver in NuttX.

See this documentation: https://nuttx.apache.org/docs/latest/components/drivers/special/usbdev.html

As examples they mention drivers/usbdev/pl2303.c and drivers/usbdev/usbmsc.c.
You could create a driver called drivers/usbdev/audio.c for instance.

Hey @Benediction-1-2,

Yeah I'm currently researching in this topic and would to collaborate. Any ideas to move forward with regard to this?

Thanks

Hi @gyps

Sorry for the delayed answer.
Here is a basic way to add another worker:

Copy hello directory under spresense/examples/asmp/worker/hello with another name in the same directory
(For example: hello2)

Rename the target binary name in the Makefile in the directory you copied
(For example:
Under spresense/examples/asmp/worker/hello2/Makefile
Line 50:
BIN = hello2)

Add a new target (hello2) in worker/Makefile in WORKER_ELFS parameter
(For example:
Under spresense/examples/asmp/worker/Makefile
Line 40:
WORKER_ELFS = hello/hello hello2/hello2
Line 73:

# Build workers hello/hello: lib $(Q) $(MAKE) -C $(dir $@) TOPDIR="$(TOPDIR)" SDKDIR="$(SDKDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV) hello2/hello2: lib $(Q) $(MAKE) -C $(dir $@) TOPDIR="$(TOPDIR)" SDKDIR="$(SDKDIR)" APPDIR="$(APPDIR)" CROSSDEV=$(CROSSDEV) )

Then, build.

OBS:
In current asmp example, worker binaries are stored in ROM-FS. If the you want to use the SD Card for storing worker binaries, you need to remove FS_ROM config and add CXD56_SDIO config, and modify worker/Makefile to avoid making romfs.h.

To do so, binary of each worker is generated in the worker directory. (In this case, hello/hello and hello2/hello2).

Hi @Ajit01

Do you have AT command firmware on the ESP8266 board?

Best Regards,
Kamil Tomaszewski

@DevMarcial

Thanks for the info!

Hi, @Sean-Phillips

Thanks for sharing your solution here!
It will be helpful for other developers in the future.

I will try this myself to validate the issue so the documentation can be updated.

Hi, @mashw

I haven't done this myself, but I found this part of the documentation that might provide further insight: https://developer.sony.com/develop/spresense/docs/sdk_developer_guide_en.html#_MIC_CHANNEL_SELECT_MAP

Let me know if this was useful. If not, I can investigate further.

Hello, @mashw
I'm sorry that you have felt a lack of support for the board.
We are working on improving our documentation so that we have even more examples to help out our users.

The code @DevMarcial mentioned is a good place to start I think.
Are you still struggling with this issue?

Let me know more information about the project so I can try to help out.
Maybe diagrams showing the microphone connections, what code you are trying to run and what is your result.