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.

Hi @maxieaussie-0

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 🙂

Hi @CamilaSouza Unfortunately, I still get the following error message when trying to flash the firmware using command "sudo ./tools/flash.sh -c /dev/ttyUSB0 nuttx.spk" :

Cannot open port : /dev/ttyUSB0
could not open port '/dev/ttyUSB0': FileNotFoundError(2,...

Hello, @Jolle
I haven't tried to do that myself.
I can try it on my side and see if I get the same error, but on the meantime I have tagged you in an old topic where some users were also trying to use wsl2.
Maybe they've seen this before.

@gyps

Thank you for the feedback!

Hi @jp04,

I had the same situation here. 3-4 satellites are not enough to get a fix. I got a fix quickly when the readings showed 7-10 satellites.

I recommend to try the following.

You might have bad luck with the sight of the satellites. Therefore try again at another location or another time. Attach a battery and go outside or at least near a window. You can use an augmented reality app on your phone that shows where the satellites are. Add other satellites than the default. For example set satType to eSatGpsQz1cQz1S if you are in Japan. See the comments in the demo. Try to attach an external GPS antenna. It requires additional parts (available at Adafruit or Akizukidenshi) and requires soldering. I can give you some advice if you want. Check if the wifi board or anything you place around the antenna causes interference.

Should you get a fix, you can save the satellite data for a hot start the next time. This call persists the data to flash memory in case you power off. Don't use the function on each update as it will wear off the flash memory.

Gnss.saveEphemeris();

Btw. I would be interested your opinion on the wifi addon board you ask for in another post. Will you send large data like images? Is it fast and reliable?
I flashed the AT firmware to one of my ESP-32 boards and connected it via UART. It works but the transfer rate is pretty slow due to the limitting UART.

@jp04

Oh, so you already saw the code patches in this website:
https://idy-design.com/product/is110b.html

I'm sorry you got no support from the manufacturer. I'm investigating internally what to do about this situation.

I've tagged in another topic where a user is trying to achieve the same thing, but with a different wifi board.
I thought you two might benefit from getting in touch since your projects might have similar components.

@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.

Hi, @Stlim-0-1

Can I ask you.. how long was the process halted before you disconnected the board from your computer?

Have you tried to run the process more than once, just in case?

If positive..
Can you describe which issues you were having with the main board that led you to try the recovery tool?

@NavaneethRao-2

Also
About AREF.
It's an output and it changes depending on whether your jumper is at 3.3V or 5V.

It is generally used as an extra voltage output.

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