How do I install OpenCV on NuttX? Or how can I compile an OpenCV Program into the SPresense?

How I make use of the SPresence's Audio library to record audio with the Main Board? (The documentation only describes the extension board's use) I currently have an electret microphone in one of the GPIO pins and want to record the audio in a MP3 file.

Hi,

I am trying to run a multi-threaded program on the SPresence microcontroller using the Arduino SDK however, I am not sure how to create threads using the SDK. Would anyone be able to do a simple demonstrate how to create & end threads, wait for a thread, and send information to a thread with some code?

@TE-KarlKomierowski Thank you for all your help! Really appreciate it.

@TE-KarlKomierowski Okay but I still have one concern, the specifications say that the SPresence camera operates at 3.7V and the board takes only a 3.7 to 4.4V battery via the CN1 connector. Is this a problem if I order a 3.7V battery? What voltage should the battery be? Note, I am not using the extension board and I noticed most of the projects have used the extension board with the camera, I am hoping it is not necessary.

Hi,

This is my first time using the SPresence Main Board (CXD5602PWBMAIN1) and SPresence Camera Board and I am using it for a project. In this project the SPresence devices will be part of a mobile battery powered system and I have the following questions I would like to have answered before I start working with the device:

1. If I were to power the SPresence Main Board with an external power supply, what is the minimum and maximum voltage and current I should feed into the device assuming no additional devices are attached? Do I use the EXT_VDD pin to power the board with an external supply (I assume yes)? I see that it can take a 5V power supply from the USB can I also use a external 5V Power Supply to power the device?

2. Product 1: How much current do the GPIO pins individually output when used as an output? What is the voltage of a logic 1 output on an individual GPIO pin? How much current should I be feeding into the GPIO pin if I use the individual pin as an input? What voltage should I be feeding into the GPIO pin if I use the individual pin as an input?

3. How much current does the SPresence 5MP Camera Board draw/use?